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WO2024240841A1 - Geothermal system comprising an energy production system - Google Patents

Geothermal system comprising an energy production system Download PDF

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Publication number
WO2024240841A1
WO2024240841A1 PCT/EP2024/064138 EP2024064138W WO2024240841A1 WO 2024240841 A1 WO2024240841 A1 WO 2024240841A1 EP 2024064138 W EP2024064138 W EP 2024064138W WO 2024240841 A1 WO2024240841 A1 WO 2024240841A1
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WO
WIPO (PCT)
Prior art keywords
geothermal
tube
heat transfer
energy
transfer fluid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/EP2024/064138
Other languages
French (fr)
Inventor
Hervé LAUTRETTE
Pascal DANTHONY
Antoine Manuel DA ROCHA DIAS
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Absolar
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Absolar
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Filing date
Publication date
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Publication of WO2024240841A1 publication Critical patent/WO2024240841A1/en
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
    • F24T10/00—Geothermal collectors
    • F24T10/10—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground
    • F24T10/13—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes
    • F24T10/17—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes using tubes closed at one end, i.e. return-type tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
    • F24T50/00—Geothermal systems 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
    • F24T10/00—Geothermal collectors
    • F24T2010/50—Component parts, details or accessories
    • F24T2010/56—Control arrangements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/10—Geothermal energy

Definitions

  • the invention relates to the technical field of geothermal systems.
  • Geothermal energy is a method of producing energy and electricity based on the exploitation of the natural heat of the subsoil which benefits from a thermal gradient of the order of 30°C every 1000m of average depth and the deeper the geothermal exchangers are, the more the geothermal gradient increases the operating temperature of the geothermal resource.
  • Geothermal energy can produce heating, electricity, hot water and air conditioning.
  • the dimensioning of the energy device requires defining the quantities of energy exchanged between the surface equipment and the buried equipment. From the quantity of energy exploited by the underground device, it is necessary to determine the thermal behavior of the underground device with respect to the environmental context.
  • the devices known until now do not make it possible to protect the environment from the underground elements of the device. In particular, heat exchanges can appear at the level of underground water tables and rivers, leading to a harmful environmental change.
  • the invention is therefore placed in this context and seeks to resolve all of the aforementioned drawbacks.
  • the invention seeks to propose a geothermal system making it possible to combat global warming by eliminating the use of fossil fuels and reducing greenhouse gas emissions and protecting the environment in which the system is integrated while producing heat, and/or cooling and/or electrical energy.
  • the invention relates to a geothermal system, comprising an energy production system capable of heating a heat transfer fluid; a system for transforming thermal energy from a heat transfer fluid; a geothermal energy storage system comprising at least one closed circuit for circulating a heat transfer fluid comprising at least a first heat transfer section connected to the energy production system, a second heat transfer section connected to the transformation system and at least one vertical geothermal probe comprising a first tube and a second tube arranged coaxially around said first tube, said probe being arranged in a borehole made in a ground and capable of storing or extracting thermal energy from this ground; a system for controlling a charge and discharge cycle of the storage system, arranged to control the circulation of the heat transfer fluid in the closed circulation circuit from the first section to the geothermal probe or from the geothermal probe to the second section according to a charge or discharge instruction of the geothermal system.
  • the invention is remarkable in that the vertical geothermal probe comprises a first cold portion extending into the borehole and a second transfer portion extending into the borehole while being arranged below the first cold portion and in that the geothermal energy storage system comprises a thermal insulation member inserted against a wall of the second tube extending into the borehole only at the level of the first cold portion.
  • the energy production system may be a thermal energy production system.
  • the heat transfer fluid may be a liquid heat transfer fluid.
  • the heat transfer fluid may be a gaseous heat transfer fluid.
  • the heat transfer fluid may allow circulation in a closed circuit inside the tubes to collect or inject energy from the subsoil.
  • the first heat transfer section may be a first circulation member of a heat transfer fluid heated by the energy production system in the vertical geothermal exchanger to store thermal energy in the ground.
  • the second heat transfer section may be a second circulation member of a heat transfer fluid stored in the geothermal energy storage system to the transformation system to extract thermal energy from the ground.
  • the energy storage system may allow heat to be stored by exploiting the thermal inertia of the subsoil through the heat capacity of the elements composing the subsoil in which the vertical geothermal probes are installed.
  • the charge and discharge control system may in particular include a short-term intermediate storage tank which can temporarily store the accumulated energy.
  • Each geothermal probe can be placed in a borehole formed by cementing by grout injection. This cementing can prevent any superficial infiltration of pollution or connection of the water tables crossed. This cementing can allow the transfer of thermal energy between the subsoil and the tubes constituting the underground exchanger.
  • the geothermal probe can be a closed loop geothermal exchanger.
  • the thermal insulation member can limit energy losses.
  • the thermal insulation member can limit the thermal impact of the device in contact with free or confined groundwater tables crossed.
  • the thermal insulation member can limit the influence of the fluctuation of the temperatures of the outside air in contact with the surface of the natural ground constituting a source of loss.
  • the insulation member can limit the thermal impact of the device on the surface of the ground covering the storage device.
  • the thermal insulation member can be inserted against a wall of the second tube.
  • the thermal insulation member can be mounted against an internal wall of said second tube and at a distance from the first tube at the first cold portion.
  • the thermal insulation member can be mounted against an external wall of said second tube and at a distance from the first tube at the first cold portion. Therefore, the use of the thermal insulation member can prevent heat transfer from occurring from the probe towards the surrounding ground and in particular towards groundwater so as to preserve said water by not thermally impacting it.
  • the second transfer portion without thermal insulation member can allow its heat to be transferred to the substrate surrounding it.
  • the heating part can thus be positioned outside the influence of groundwater flows, but also in a suitable geological substrate. This specific positioning of the heating part can make it possible to increase the efficiency of the storage volume and to adapt the injected energy power according to needs.
  • the geothermal system can make it possible to exploit injection temperature levels in the subsoil, in particular up to 250°C. Therefore, the probe can include materials suitable for withstanding this type of temperature.
  • the geothermal system may be designed to eliminate any risk of thermal impacts on the groundwater resource.
  • the geothermal system may be designed to limit thermal losses from the device into the subsoil.
  • the geothermal system may be designed to limit the thermal impact on underground microbial life.
  • the geothermal system may be adapted to support the injection of heat transfer fluid to raise the temperature of a predefined volume of elements constituting the subsoil, in particular rocks.
  • the geothermal system may generate cycles of injection and extraction of energy in the subsoil.
  • the closed circulation circuit of the energy storage system comprises a plurality of vertical geothermal probes connected in parallel and/or in series to a collector connected to the first and second transfer sections and arranged to distribute the heat transfer fluid to each of the vertical geothermal probes.
  • the collector may in one embodiment comprise a distributor function.
  • the collector can be arranged to distribute the heat transfer fluid to each of the vertical geothermal probes.
  • the energy storage system may allow for the recovery of an excess thermal energy source so that the heat produced can be stored for several months before being reused.
  • the energy production system comprises a solar power plant and/or an energy recovery plant.
  • the energy production system may advantageously comprise a solar thermal power plant.
  • the energy production system may comprise a photovoltaic solar power plant.
  • the energy production system may comprise solar collectors for the production of heat, cooling and/or electrical energy.
  • the energy production system may comprise any so-called renewable energy source and/or recovery energy source, intermittent or continuous, local, decarbonized and renewable.
  • the energy production system may comprise a renewable thermal energy source.
  • the energy production system may comprise a recovery thermal energy source.
  • the energy production system may comprise a recovery thermal energy source greater than 70°, in particular greater than 90°.
  • the energy recovery plant can advantageously be based on the principle of recovering fatal energies.
  • the vertical geothermal probe comprises a first tube and a second tube arranged coaxially around the first tube, the tubes together forming said first and second portions of the vertical geothermal probe, the internal volume of the first tube defining a volume for injecting the heat transfer fluid heated by the energy production system and the volume formed between the first tube and the second tube defining a volume for transferring thermal energy to the ground for its storage during a charging cycle; and the volume formed between the first tube and the second tube defining a volume for transferring thermal energy from the ground and the internal volume of the first tube defining an extraction volume of the heat transfer fluid heated by the ground towards the transformation system during a discharge cycle.
  • the first tube may be pre-insulated steel.
  • the first tube may be evacuated.
  • the first tube may not be evacuated.
  • the second tube may be pre-insulated steel.
  • the second tube may be evacuated.
  • the second tube may not be evacuated.
  • the first and second tubes may comprise a plurality of layers.
  • the first and second tubes may be adapted to reduce heat transfer by convection and/or conduction and/or radiation between the interior and the exterior.
  • the injection temperature of the heat transfer fluid at the probe inlet can be between 90 and 250°C.
  • the injection temperature of the heat transfer fluid at the inlet of the probe may be greater than 40°C and the temperature of the heat transfer fluid at the outlet of the probe may be greater than 90°C.
  • the transformation system can make it possible to direct the energy produced towards homes and/or agricultural buildings and/or industrial buildings and/or heating, cooling and/or electrical energy networks.
  • the vertical geothermal probe comprises an external heat exchange layer arranged between an internal wall of the borehole and an external wall of the second tube.
  • the outer layer may be an outer surface of the vertical geothermal probe.
  • the outer heat exchange layer may have a diameter substantially similar to the borehole and adapted to surround said heat exchanger.
  • the external exchange layer can allow homogeneous filling over the height of the drilling and can prevent superficial infiltration of pollution or connection of the water tables crossed.
  • the external heat exchange surface of said SGV whose diameter is substantially similar to the borehole and adapted to surround said geothermal exchanger with injection cementing between the borehole and the exchanger geothermal allowing a homogeneous filling over the height of the borehole and avoiding the risk of superficial infiltration of pollution or connection of the water tables crossed ensures the transfer of energy between the subsoil and the tubes constituting the underground exchanger.
  • the first tube comprises a plurality of tube sections arranged one after the other and held two by two by a fixing element.
  • the fixing elements may advantageously be clip connectors.
  • the fixing elements may be of the screwed and/or notched sleeve type.
  • the fixing elements may be watertight.
  • the fixing elements may be pre-insulated.
  • the arrangement using a plurality of tubes held two by two by fixing elements can allow the use of a probe of 30 m depth.
  • the probe can be 2000 m deep.
  • the second tube comprises a plurality of tube sections arranged one after the other and held two by two by a fixing element.
  • the vertical geothermal probe comprises a filtration member mounted on the first tube at the lower end of the second transfer portion.
  • the filtration member may comprise on the first tube, at the level of the lower end of the second transfer portion, a segment of perforated tube distributing the heat transfer fluid adapted for charging and discharging and the sum of the flow rates of each hole being equal to the flow rate of the heat transfer fluid.
  • the filtration member may be arranged to allow the passage of the heat transfer fluid from the internal volume of the first tube to the volume formed between the first tube and the second tube, and vice versa.
  • the vertical geothermal probe comprises a member for closing the second tube, mounted on the second tube at the lower end of the second transfer portion.
  • the closure member may comprise a solid tube segment.
  • the closure member may be sealed.
  • the closure member may be mounted at a lower end of the second tube, in particular in the transfer portion.
  • the heat transfer fluid comprises a liquid or gaseous fluid.
  • the heat transfer fluid may allow the exchange of energy between the tubes and the subsoil.
  • the heat transfer fluid may be adapted to circulate in the tubes in a sufficiently slow manner to allow the transfer of heat energy by conduction.
  • the heat transfer fluid may comprise water, glycol, thermal oil and/or any other liquid capable of accepting a biodegradable heat load without impact on the environment.
  • the system for transforming thermal energy from a heat transfer fluid comprises a heat pump, a refrigeration machine, and/or a turbine.
  • the transformation system may comprise, depending on the energy uses to be covered, a direct supply of heat energy and/or a supply of heat energy associated with a heat pump and/or a production of refrigeration energy associated with a refrigeration machine and/or a supply of electricity associated with an electricity production module.
  • FIG. 1 schematically represents a sectional view of two coaxial vertical probes inserted into a ground, one of the probes being in a charging state and the other of the probes being in a discharging state, according to one embodiment.
  • FIG. 2 schematically represents a perspective view in section of a vertical probe head according to one embodiment
  • FIG. 3 schematically represents a perspective view in section of a vertical probe foot according to one embodiment.
  • FIG. 4 schematically represents a perspective view in section of a vertical probe integrated into a borehole in the ground, according to one embodiment.
  • FIG. 5 schematically represents a perspective view in section of a geothermal system for storing underground energy from solar energy and comprising a plurality of vertical probes according to one embodiment.
  • FIG. 6 schematically represents a perspective view in section of a geothermal system for storing underground energy from fatal energy and comprising a plurality of vertical probes according to one embodiment.
  • FIG. 1 describes a set of coaxial vertical probes 120 according to an embodiment of the invention.
  • the vertical probes 120 are described in connection with [Fig. 2], [Fig. 3] and [Fig. 4],
  • the vertical probes 120 are adapted to be included in a geothermal system 1 described in [Fig. 5] and [Fig. 6],
  • FIG. 5 describes a geothermal system 1, comprising an energy production system 10 capable of heating a heat transfer fluid.
  • the heat transfer fluid allows circulation in a closed circuit to collect or inject energy from a subsoil.
  • the energy production system 10 of this embodiment comprises a solar power plant.
  • the solar power plant comprises thermal solar collectors for the production of heat, cooling and/or electrical energy.
  • FIG. 6 describes a geothermal system 1, comprising an energy production system 10 capable of heating a heat transfer fluid.
  • the heat transfer fluid allows circulation in a closed circuit to draw or inject energy from a subsoil.
  • the energy production system 10 of this embodiment uses fatal energy.
  • the geothermal system 1 comprises a transformation system 11 of thermal energy from the heat transfer fluid.
  • the transformation system 11 comprises a heat pump, a refrigeration machine, and/or a turbine.
  • the geothermal system 1 comprises a geothermal energy storage system 12 described in [Fig. 2] and in [Fig. 4],
  • the energy storage system 12 comprises a closed circuit for circulating the heat transfer fluid.
  • the energy storage system 12 comprises a first heat transfer section connected to the energy production system 10, a second heat transfer section connected to the transformation system 11 and at least one vertical geothermal probe 120 arranged in a borehole made in a ground and capable of storing or extracting thermal energy from this ground.
  • the energy storage system 12 comprises two probes 120 and in the embodiment described in [Fig. 5] and in [Fig. 6], the energy storage system 12 comprises a plurality of vertical geothermal probes 120.
  • the first heat transfer section is a first circulation member of a heat transfer fluid heated by the energy production system 10 in the vertical geothermal probe 120 to store thermal energy in the ground S.
  • the second heat transfer section is a second circulation member of a heat transfer fluid stored in the geothermal energy storage system 12 to the transformation system 11 to extract thermal energy from the ground S.
  • the energy storage system 12 makes it possible to store heat by exploiting the thermal inertia of the subsoil S through the heat capacity of the elements making up the subsoil S in which the vertical geothermal probes 120 are installed.
  • the vertical geothermal probe 120 comprises a first cold portion 120.1 extending into a borehole and a second transfer portion 120.2 extending into the borehole while being arranged below the first cold portion 120.1.
  • the vertical geothermal probe 120 comprises a first tube 120.4 and a second tube 120.5 arranged coaxially around the first tube 120.4.
  • the tubes together form the first 120.1 and second 120.2 portions of the vertical geothermal probe 120.
  • the geothermal energy storage system 12 comprises a thermal insulation member 120.3 extending into the borehole only at the first cold portion 120.1.
  • the second transfer portion 120.2 without thermal insulation member 120.3 gives off its heat to the substrate surrounding it.
  • the thermal insulation member 120.3 is inserted inside the second tube 120.5.
  • the thermal insulation member 120.3 is mounted against an internal wall of the second tube 120.5 and at a distance from the first tube 120.4.
  • the internal volume of the first tube 120.4 defines a volume for injecting the heat transfer fluid heated by the energy production system 10 and the volume formed between the first tube 120.4 and the second tube 120.5 defines a volume for transferring thermal energy to the ground S for its storage during a charging cycle.
  • the volume formed between the first tube 120.4 and the second tube 120.5 defines a volume for transferring thermal energy from the ground S.
  • the internal volume of the first tube 120.4 defines a volume for extracting the heat transfer fluid heated by the ground S to the transformation system 11 during a discharging cycle.
  • the injection temperature of the heat transfer fluid at the inlet of the probe 120 is between 90 and 250°C.
  • the injection temperature of the heat transfer fluid at the inlet of the probe 120 is greater than 60°C and the temperature of the heat transfer fluid at the outlet of the probe 120 is greater than 90°C.
  • the geothermal system 1 comprises a system for controlling a charge and discharge cycle of the storage system 12, arranged to control the circulation of the heat transfer fluid in the closed circulation circuit from the first section to the geothermal probe 120 or from the geothermal probe 120 to the second section as a function of a charge or discharge instruction from the geothermal system 1.
  • the first tube 120.4 comprises a plurality of tube sections arranged one after the other and held two by two by a fixing element 120.6.
  • the second tube 120.5 comprises a plurality of tube sections arranged one after the other and held two by two by a fixing element 120.6. one after the other and held in pairs by a fixing element 120.6.
  • the fixing elements 120.6 are advantageously clip connectors.
  • the fixing elements 120.6 are watertight.
  • the fixing elements 120.6 are pre-insulated.
  • the use of a plurality of tubes held in pairs by fixing elements allows the use of a probe 120 of 1000 m depth.
  • the vertical geothermal probe 120 comprises a closing member 120.8 of the second tube 120.5.
  • the closing member 120.8 is mounted on the second tube 120.5 at the lower end of the second transfer portion.
  • the closing member 120.8 comprises a solid tube segment.
  • the closing member 120.8 is watertight.
  • the closing member 120.8 is mounted at a lower end of the second tube 120.5, in particular in the transfer portion.
  • the vertical geothermal probe 120 comprises an external heat exchange layer arranged between an internal wall of the borehole and an external wall of the second tube 120.5.
  • the vertical geothermal probe 120 comprises a filtration member 120.7 mounted on the first tube 120.4 at the lower end of the second transfer portion.
  • the filtration member 120.7 comprises on the first tube 120.4, at the lower end of the second transfer portion, a segment of perforated tube distributing the heat transfer fluid adapted for charging and discharging and the sum of the flow rates of each hole of which is equal to the flow rate of the heat transfer fluid.
  • the filtration member 120.7 is arranged to allow the passage of the heat transfer fluid from the internal volume of the first tube 120.4 to the volume formed between the first tube 120.4 and the second tube 120.5, and vice versa.
  • the transformation system 11 directs the energy produced to the buildings to be supplied.
  • the closed circulation circuit of the energy storage system 12 comprises a plurality of vertical geothermal probes 120 connected in parallel and/or in series to a collector 13 connected to the first and second transfer sections.
  • the collector 13 is arranged to distribute the heat transfer fluid to each of the geothermal probes.
  • vertical 120 The collector 13 is arranged to distribute the heat transfer fluid to each of the vertical geothermal probes 120.
  • the closed circulation circuit of the energy storage system 12 comprises a plurality of vertical geothermal probes 120 connected in parallel and/or in series to a collector 13 connected to the first and second transfer sections.
  • the collector 13 is arranged to distribute the heat transfer fluid to each of the vertical geothermal probes 120.
  • the collector 13 is arranged to distribute the heat transfer fluid to each of the vertical geothermal probes 120.
  • a geothermal system making it possible to combat global warming by eliminating the use of fossil fuels and reducing greenhouse gas emissions and protecting the environment in which the system is integrated while producing heat, and/or cooling and/or electrical energy, by proposing a geothermal system, comprising an energy production system capable of heating a heat transfer fluid; a system for transforming thermal energy from a heat transfer fluid; a geothermal energy storage system comprising at least one closed circuit for circulating a heat transfer fluid comprising at least one vertical geothermal probe comprising a first tube and a second tube arranged coaxially around said first tube, said probe being arranged in a borehole made in a ground and capable of storing or extracting thermal energy from this ground; a system for controlling a charge and discharge cycle of the storage system characterized in that the geothermal probe comprises a first cold portion and a second transfer portion arranged below the first cold portion and in that the geother
  • the heat transfer fluid can be a liquid heat transfer fluid.
  • the heat transfer fluid can be a gaseous heat transfer fluid.
  • the energy production system may include a fatal energy recovery plant.
  • the energy production system may comprise any so-called renewable energy source and/or intermittent or continuous, local, decarbonized and renewable energy source.
  • the energy production system may include a renewable thermal energy source.
  • the energy production system may comprise a source of recovery thermal energy greater than 70°, in particular greater than 90°.
  • the first tube may be pre-insulated steel.
  • the first tube may be vacuum.
  • the first tube may not be vacuum.
  • the second tube may be pre-insulated steel.
  • the second tube may be evacuated.
  • the second tube may not be evacuated.
  • the fixing elements can be of the screwed sleeve and/or notched type.

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Abstract

The invention relates to a geothermal system (1) comprising: an energy production system (10) capable of heating a heat-transfer fluid; a system (11) for converting thermal energy from a heat-transfer fluid; a geothermal energy storage system (12) comprising at least one closed circuit for circulating a heat-transfer fluid, which comprises at least one vertical geothermal probe (120) which is arranged in a borehole (F) provided in the ground (S) and is capable of storing or extracting thermal energy from the ground (S); and a system for controlling a charge and discharge cycle of the storage system (12), characterised in that the probe (1) comprises a first cold portion (120.1) and a second transfer portion (120.2) which is arranged below the first cold portion (120.1), and in that the geothermal energy storage system (1) comprises a thermal insulation member (120.3) which extends in the borehole (F) only to the height of the first cold portion (120.1).

Description

Description Description

SYSTEME GEOTHERMIQUE COMPORTANT UN SYSTEME DE PRODUCTION D'ENERGIE GEOTHERMAL SYSTEM COMPRISING AN ENERGY PRODUCTION SYSTEM

Domaine technique Technical field

[0001] L'invention se rapporte au domaine technique des systèmes géothermiques. [0001] The invention relates to the technical field of geothermal systems.

Etat de la technique State of the art

[0002] La géothermie est une méthode de production d'énergie et d'électricité basée sur l'exploitation de la chaleur naturelle du sous-sol qui bénéficie d'un gradient thermique de l'ordre de 30°C tous les 1000m de profondeur moyenne et plus les échangeurs géothermiques sont profonds, plus le gradient géothermique augmente la température d'exploitation de la ressource géothermique. Il existe plusieurs filières de géothermie en fonction du niveau de température d'exploitation. La géothermie permet de produire du chauffage de l'électricité et de l'eau chaude et de la climatisation. [0002] Geothermal energy is a method of producing energy and electricity based on the exploitation of the natural heat of the subsoil which benefits from a thermal gradient of the order of 30°C every 1000m of average depth and the deeper the geothermal exchangers are, the more the geothermal gradient increases the operating temperature of the geothermal resource. There are several geothermal energy sectors depending on the operating temperature level. Geothermal energy can produce heating, electricity, hot water and air conditioning.

[0003] Toutefois le dimensionnement du dispositif énergétique nécessite de définir les quantités d'énergies échangées entre les équipements de surface et les équipements enterrés. A partir de la quantité d'énergie exploitée par le dispositif souterrain il faut déterminer le comportement thermique du dispositif sous terrain vis-à-vis du contexte environnemental. Les dispositifs connus jusqu'alors ne permettent pas de protéger l'environnement des éléments sous terrains du dispositif. Notamment des échanges de chaleur peuvent apparaître au niveau des nappes phréatiques et rivières sous terraines, entraînant une modification environnementale néfaste. [0003] However, the dimensioning of the energy device requires defining the quantities of energy exchanged between the surface equipment and the buried equipment. From the quantity of energy exploited by the underground device, it is necessary to determine the thermal behavior of the underground device with respect to the environmental context. The devices known until now do not make it possible to protect the environment from the underground elements of the device. In particular, heat exchanges can appear at the level of underground water tables and rivers, leading to a harmful environmental change.

[0004] L'invention se place donc dans ce contexte et cherche à résoudre l'ensemble des inconvénients précités. Ainsi, l'invention cherche à proposer un système géothermique permettant de lutter contre le réchauffement climatique par la suppression d'utilisation des énergies fossiles et la réduction des émissions de gaz à effet de serre et protégeant l'environnement dans lequel est intégré le système tout en produisant de l'énergie calorifique, et/ou frigorifique et/ou électrique.[0004] The invention is therefore placed in this context and seeks to resolve all of the aforementioned drawbacks. Thus, the invention seeks to propose a geothermal system making it possible to combat global warming by eliminating the use of fossil fuels and reducing greenhouse gas emissions and protecting the environment in which the system is integrated while producing heat, and/or cooling and/or electrical energy.

Présentation de l'invention. [0005] L'invention a pour objet un système géothermique, comportant un système de production d'énergie apte à chauffer un fluide caloporteur ; un système de transformation d'une énergie thermique d'un fluide caloporteur ; un système de stockage d'énergie géothermique comportant au moins un circuit fermé de circulation d'un fluide caloporteur comportant au moins une première section de transfert thermique reliée au système de production d'énergie, une deuxième section de transfert thermique reliée au système de transformation et au moins une sonde géothermique verticale comportant un premier tube et un deuxième tube agencé coaxialement autour dudit premier tube, ladite sonde étant agencée dans un forage ménagé dans un sol et apte à stocker ou extraire de l'énergie thermique depuis ce sol ; un système de contrôle d'un cycle de charge et de décharge du système de stockage, agencé pour contrôler la circulation du fluide caloporteur dans le circuit fermé de circulation de la première section vers la sonde géothermique ou de la sonde géothermique vers la deuxième section en fonction d'une instruction de charge ou de décharge du système géothermique. L'invention est remarquable en ce que la sonde géothermique verticale comporte une première portion froide s'étendant dans le forage et une deuxième portion de transfert s'étendant dans le forage en étant agencée en-dessous de la première portion froide et en ce que le système de stockage d'énergie géothermique comporte un organe d'isolation thermique inséré contre une paroi du deuxième tube s'étendant dans le forage uniquement au niveau de la première portion froide. [0006] Le système de production d'énergie peut être un système de production d'énergie thermique. Le fluide caloporteur peut être un fluide caloporteur liquide. Le fluide caloporteur peut être un fluide caloporteur gazeux. Le fluide caloporteur peut permettre de circuler en circuit fermé à l'intérieur des tubes pour prélever ou injecter l'énergie provenant du sous-sol. Presentation of the invention. [0005] The invention relates to a geothermal system, comprising an energy production system capable of heating a heat transfer fluid; a system for transforming thermal energy from a heat transfer fluid; a geothermal energy storage system comprising at least one closed circuit for circulating a heat transfer fluid comprising at least a first heat transfer section connected to the energy production system, a second heat transfer section connected to the transformation system and at least one vertical geothermal probe comprising a first tube and a second tube arranged coaxially around said first tube, said probe being arranged in a borehole made in a ground and capable of storing or extracting thermal energy from this ground; a system for controlling a charge and discharge cycle of the storage system, arranged to control the circulation of the heat transfer fluid in the closed circulation circuit from the first section to the geothermal probe or from the geothermal probe to the second section according to a charge or discharge instruction of the geothermal system. The invention is remarkable in that the vertical geothermal probe comprises a first cold portion extending into the borehole and a second transfer portion extending into the borehole while being arranged below the first cold portion and in that the geothermal energy storage system comprises a thermal insulation member inserted against a wall of the second tube extending into the borehole only at the level of the first cold portion. [0006] The energy production system may be a thermal energy production system. The heat transfer fluid may be a liquid heat transfer fluid. The heat transfer fluid may be a gaseous heat transfer fluid. The heat transfer fluid may allow circulation in a closed circuit inside the tubes to collect or inject energy from the subsoil.

[0007] La première section de transfert thermique peut être un premier organe de circulation d'un fluide caloporteur chauffé par le système de production d'énergie dans l'échangeur géothermique vertical pour stocker de l'énergie thermique dans le sol. [0008] La deuxième section de transfert thermique peut être un deuxième organe de circulation d'un fluide caloporteur stocké dans le système de stockage d'énergie géothermique vers le système de transformation pour extraire de l'énergie thermique du sol. Le système de stockage d'énergie peut permettre de stocker de la chaleur en exploitant l'inertie thermique du sous-sol à travers la capacité calorifique des éléments composant le sous-sol dans lequel les sondes géothermiques verticales sont installées. [0007] The first heat transfer section may be a first circulation member of a heat transfer fluid heated by the energy production system in the vertical geothermal exchanger to store thermal energy in the ground. [0008] The second heat transfer section may be a second circulation member of a heat transfer fluid stored in the geothermal energy storage system to the transformation system to extract thermal energy from the ground. The energy storage system may allow heat to be stored by exploiting the thermal inertia of the subsoil through the heat capacity of the elements composing the subsoil in which the vertical geothermal probes are installed.

[0009] Le système de contrôle de charge et de décharge peut notamment comporter une ballon de stockage intermédiaire de courte durée qui peut permettre de stockée temporairement l'énergie accumulée. [0009] The charge and discharge control system may in particular include a short-term intermediate storage tank which can temporarily store the accumulated energy.

[0010] Chaque sonde géothermique peut être disposée dans un forage formé par cimentation par injection de coulis. Cette cimentation peut permettre d'éviter toute infiltration superficielle de pollution ou de mise en connexion des nappes traversées. Cette cimentation peut permettre le transfert d'énergie thermique entre le sous-sol et les tubes constituant l'échanger souterrain. [0010] Each geothermal probe can be placed in a borehole formed by cementing by grout injection. This cementing can prevent any superficial infiltration of pollution or connection of the water tables crossed. This cementing can allow the transfer of thermal energy between the subsoil and the tubes constituting the underground exchanger.

[0011] La sonde géothermique peut être un échangeur géothermique sur boucle fermée. [0011] The geothermal probe can be a closed loop geothermal exchanger.

[0012] L'organe d'isolation thermique peut permettre de limiter les déperditions énergétiques. L'organe d'isolation thermique peut permettre de limiter l'incidence thermique du dispositif au contact de nappes d'eaux souterraines libres ou captives traversées. L'organe d'isolation thermique peut permettre de limiter l'influence de la fluctuation des températures de l'air extérieur au contact de la surface du terrain naturel constituant une source de déperdition. L'organe d'isolation peut permettre de limiter l'incidence thermique du dispositif sur la surface du terrain qui recouvre le dispositif de stockage. L'organe d'isolation thermique peut être inséré contre une paroi du deuxième tube. Dans un mode de réalisation, l'organe d'isolation thermique peut être monté contre une paroi interne dudit deuxième tube et à distance du premier tube au niveau de la première portion froide. Dans un autre mode de réalisation, l'organe d'isolation thermique peut être monté contre une paroi externe dudit deuxième tube et à distance du premier tube au niveau de la première portion froide. Dès lors, l'utilisation de l'organe d'isolation thermique peut permettre d'éviter qu'un transfert thermique puisse être effectué depuis la sonde vers le sol environnant et en particulier vers les eaux souterraines de manière à préserver lesdites eaux en ne les impactant pas thermiquement. [0012] The thermal insulation member can limit energy losses. The thermal insulation member can limit the thermal impact of the device in contact with free or confined groundwater tables crossed. The thermal insulation member can limit the influence of the fluctuation of the temperatures of the outside air in contact with the surface of the natural ground constituting a source of loss. The insulation member can limit the thermal impact of the device on the surface of the ground covering the storage device. The thermal insulation member can be inserted against a wall of the second tube. In one embodiment, the thermal insulation member can be mounted against an internal wall of said second tube and at a distance from the first tube at the first cold portion. In another embodiment, the thermal insulation member can be mounted against an external wall of said second tube and at a distance from the first tube at the first cold portion. Therefore, the use of the thermal insulation member can prevent heat transfer from occurring from the probe towards the surrounding ground and in particular towards groundwater so as to preserve said water by not thermally impacting it.

[0013] La deuxième portion de transfert sans organe d'isolation thermique peut permettre de céder sa chaleur au substrat qui l'entoure. La partie chauffante peut ainsi être positionnée en dehors de l'influence des écoulements des eaux souterraines, mais également dans un substrat géologique adapté. Ce positionnement spécifique de la partie chauffante peut permettre d'augmenter l'efficience du volume de stockage et d'adapter la puissance d'énergie injectée selon les besoins. [0013] The second transfer portion without thermal insulation member can allow its heat to be transferred to the substrate surrounding it. The heating part can thus be positioned outside the influence of groundwater flows, but also in a suitable geological substrate. This specific positioning of the heating part can make it possible to increase the efficiency of the storage volume and to adapt the injected energy power according to needs.

[0014] Le système géothermique peut permettre de valoriser des niveaux de températures d'injection dans le sous-sol notamment jusqu'à 250°C. Dès lors, la sonde peut comporter des matériaux adaptés pour supporter ce type de températures. [0014] The geothermal system can make it possible to exploit injection temperature levels in the subsoil, in particular up to 250°C. Therefore, the probe can include materials suitable for withstanding this type of temperature.

[0015] Le système géothermique peut être conçu pour permettre d'écarter tout risque d'incidences thermiques sur la ressource en eau souterraine. Le système géothermique peut être conçu pour permettre de limiter les déperditions thermiques du dispositif dans le sous-sol. Le système géothermique peut être conçu pour permettre de circonscrire l'impact thermique sur la vie microbienne souterraine. [0015] The geothermal system may be designed to eliminate any risk of thermal impacts on the groundwater resource. The geothermal system may be designed to limit thermal losses from the device into the subsoil. The geothermal system may be designed to limit the thermal impact on underground microbial life.

[0016] Le système géothermique peut être adapté pour supporter l'injection de fluide caloporteur pour monter en température un volume prédéfini d'éléments constituant le sous-sol, notamment des roches. Le système géothermique peut générer des cycles d'injection et d'extraction d'énergie dans le sous-sol. [0016] The geothermal system may be adapted to support the injection of heat transfer fluid to raise the temperature of a predefined volume of elements constituting the subsoil, in particular rocks. The geothermal system may generate cycles of injection and extraction of energy in the subsoil.

[0017] Avantageusement, le circuit fermé de circulation du système de stockage d'énergie comporte une pluralité de sondes géothermiques verticales reliées en parallèle et/ou en série à un collecteur relié aux premières et deuxième section de transfert et agencé pour distribuer le fluide caloporteur vers chacune des sondes géothermiques verticales. [0017] Advantageously, the closed circulation circuit of the energy storage system comprises a plurality of vertical geothermal probes connected in parallel and/or in series to a collector connected to the first and second transfer sections and arranged to distribute the heat transfer fluid to each of the vertical geothermal probes.

[0018] Le collecteur peut dans un mode de réalisation comporter une fonction de distributeur. [0018] The collector may in one embodiment comprise a distributor function.

[0019] Le collecteur peut être agencé pour répartir le fluide caloporteur vers chacune des sondes géothermiques verticales. [0020] Le système de stockage d'énergie peut permettre de récupérer une source d'énergie thermique excédentaire de sorte que la chaleur produite puisse être conservée plusieurs mois avant d'être réutilisée. [0019] The collector can be arranged to distribute the heat transfer fluid to each of the vertical geothermal probes. [0020] The energy storage system may allow for the recovery of an excess thermal energy source so that the heat produced can be stored for several months before being reused.

[0021] Avantageusement, le système de production d'énergie comporte une centrale solaire et/ou une centrale de récupération d'énergie. [0021] Advantageously, the energy production system comprises a solar power plant and/or an energy recovery plant.

[0022] Le système de production d'énergie peut avantageusement comporter une centrale solaire thermique. Dans un autre mode de réalisation, le système de production d'énergie peut comporter une centrale solaire photovoltaïque. Le système de production d'énergie peut comporter des capteurs solaires pour la production d'énergie calorifique, frigorifique et/ou électrique. Dans un autre mode de réalisation, le système de production d'énergie peut comporter toute source d'énergie dite renouvelable et/ou source d'énergie de récupération, intermittente ou continue, locale, décarbonée et renouvelable. Dans un autre mode de réalisation, le système de production d'énergie peut comporter une source d'énergie thermique renouvelable. Dans un autre mode de réalisation, le système de production d'énergie peut comporter une source d'énergie thermique de récupération. Dans un mode différent de réalisation, le système de production d'énergie peut comporter une source d'énergie thermique de récupération supérieure à 70°, notamment supérieure à 90°. [0022] The energy production system may advantageously comprise a solar thermal power plant. In another embodiment, the energy production system may comprise a photovoltaic solar power plant. The energy production system may comprise solar collectors for the production of heat, cooling and/or electrical energy. In another embodiment, the energy production system may comprise any so-called renewable energy source and/or recovery energy source, intermittent or continuous, local, decarbonized and renewable. In another embodiment, the energy production system may comprise a renewable thermal energy source. In another embodiment, the energy production system may comprise a recovery thermal energy source. In a different embodiment, the energy production system may comprise a recovery thermal energy source greater than 70°, in particular greater than 90°.

[0023] La centrale de récupération d'énergie peut avantageusement être basée sur le principe de la valorisation d'énergies fatales. [0023] The energy recovery plant can advantageously be based on the principle of recovering fatal energies.

[0024] Avantageusement, la sonde géothermique verticale comporte un premier tube et un deuxième tube agencé coaxialement autour du premier tube, les tubes formant ensemble lesdites première et deuxième portions de la sonde géothermique verticale, le volume interne du premier tube définissant un volume d'injection du fluide caloporteur chauffé par le système de production d'énergie et le volume formé entre le premier tube et le deuxième tube définissant un volume de transfert d'énergie thermique vers le sol pour son stockage lors d'un cycle de charge ; et le volume formé entre le premier tube et le deuxième tube définissant un volume de transfert d'énergie thermique depuis le sol et le volume interne du premier tube définissant un volume d'extraction du fluide caloporteur chauffé par le sol vers le système de transformation lors d'un cycle de décharge. [0024] Advantageously, the vertical geothermal probe comprises a first tube and a second tube arranged coaxially around the first tube, the tubes together forming said first and second portions of the vertical geothermal probe, the internal volume of the first tube defining a volume for injecting the heat transfer fluid heated by the energy production system and the volume formed between the first tube and the second tube defining a volume for transferring thermal energy to the ground for its storage during a charging cycle; and the volume formed between the first tube and the second tube defining a volume for transferring thermal energy from the ground and the internal volume of the first tube defining an extraction volume of the heat transfer fluid heated by the ground towards the transformation system during a discharge cycle.

[0025] Le premier tube peut être en acier pré isolé. Le premier tube peut être sous vide. Le premier tube peut ne pas être sous vide. [0025] The first tube may be pre-insulated steel. The first tube may be evacuated. The first tube may not be evacuated.

[0026] Le deuxième tube peut être en acier pré isolé. Le deuxième tube peut être sous vide. Le deuxième tube peut ne pas être sous vide. [0026] The second tube may be pre-insulated steel. The second tube may be evacuated. The second tube may not be evacuated.

[0027] Le premier et le deuxième tube peuvent comporter une pluralité de couches. Le premier et le deuxième tube peuvent être adaptés pour réduire le transfert de chaleur par convection et/ou conduction et/ou rayonnement entre l'intérieur et l'extérieur. [0027] The first and second tubes may comprise a plurality of layers. The first and second tubes may be adapted to reduce heat transfer by convection and/or conduction and/or radiation between the interior and the exterior.

[0028] Lors d'un cycle de charge, la température d'injection du fluide caloporteur à l'entrée de la sonde peut être compris entre 90 et 250°C. [0028] During a charging cycle, the injection temperature of the heat transfer fluid at the probe inlet can be between 90 and 250°C.

[0029] Lors d'un cycle de décharge, la température d'injection du fluide caloporteur à l'entrée de la sonde peut être supérieur à 40°C et la température du fluide caloporteur à la sortie de la sonde peut être supérieur à 90°C. [0029] During a discharge cycle, the injection temperature of the heat transfer fluid at the inlet of the probe may be greater than 40°C and the temperature of the heat transfer fluid at the outlet of the probe may be greater than 90°C.

[0030] Le système de transformation peut permettre de diriger l'énergie produite vers des habitations et/ou des bâtiments agricoles et/ou des bâtiments industriels et/ou des réseaux d'énergie calorifique, frigorifique et/ou électrique. [0030] The transformation system can make it possible to direct the energy produced towards homes and/or agricultural buildings and/or industrial buildings and/or heating, cooling and/or electrical energy networks.

[0031] Avantageusement, la sonde géothermique verticale comporte une couche externe d'échange thermique agencée entre une paroi interne du forage et une paroi externe du deuxième tube. [0031] Advantageously, the vertical geothermal probe comprises an external heat exchange layer arranged between an internal wall of the borehole and an external wall of the second tube.

[0032] La couche externe peut être une surface externe de la sonde géothermique verticale. La couche externe d'échange thermique peut comporter un diamètre sensiblement similaire au forage et adapté pour entourer ledit échangeur thermique. [0032] The outer layer may be an outer surface of the vertical geothermal probe. The outer heat exchange layer may have a diameter substantially similar to the borehole and adapted to surround said heat exchanger.

[0033] La couche externe d'échange peut permettre un remplissage homogène sur la hauteur du forage et peut permettre d'éviter les infiltrations superficielles de pollution ou de mise en connexion des nappes traversées. [0033] The external exchange layer can allow homogeneous filling over the height of the drilling and can prevent superficial infiltration of pollution or connection of the water tables crossed.

[0034] La surface externe d'échange thermique de ladite SGV dont le diamètre est sensiblement similaire au forage et adapté pour entourer ledit échangeur géothermique avec une cimentation par injection entre le forage et l'échangeur géothermique permettant un remplissage homogène sur la hauteur du forage et d'éviter le risque d'infiltration superficielle de pollution ou de mise en connexion des nappes phréatiques traversées assure le transfert d'énergie entre le sous-sol et les tubes constituants l'échangeur souterrain. [0034] The external heat exchange surface of said SGV whose diameter is substantially similar to the borehole and adapted to surround said geothermal exchanger with injection cementing between the borehole and the exchanger geothermal allowing a homogeneous filling over the height of the borehole and avoiding the risk of superficial infiltration of pollution or connection of the water tables crossed ensures the transfer of energy between the subsoil and the tubes constituting the underground exchanger.

[0035] Avantageusement, le premier tube comporte une pluralité de sections de tubes agencées les unes après les autres et maintenues deux à deux par un élément de fixation. [0035] Advantageously, the first tube comprises a plurality of tube sections arranged one after the other and held two by two by a fixing element.

[0036] Les éléments de fixation peuvent avantageusement être des raccords clips. Les éléments de fixation peuvent être de type manchon vissé et/ou crante. Les éléments de fixation peuvent être étanches. Les éléments de fixation peuvent être pré-isolés. [0036] The fixing elements may advantageously be clip connectors. The fixing elements may be of the screwed and/or notched sleeve type. The fixing elements may be watertight. The fixing elements may be pre-insulated.

[0037] L'agencement par utilisation d'une pluralité de tubes maintenus deux à deux par des éléments de fixation peut permettre l'utilisation d'une sonde de 30 m de profondeur. Dans un autre mode de réalisation, la sonde peut être de 2000 m de profondeur. [0037] The arrangement using a plurality of tubes held two by two by fixing elements can allow the use of a probe of 30 m depth. In another embodiment, the probe can be 2000 m deep.

[0038] Le deuxième tube comporte une pluralité de sections de tubes agencées les unes après les autres et maintenues deux à deux par un élément de fixation. [0038] The second tube comprises a plurality of tube sections arranged one after the other and held two by two by a fixing element.

[0039] Avantageusement, la sonde géothermique verticale comporte un organe de filtration monté sur le premier tube au niveau de l'extrémité inférieure de la deuxième portion de transfert. [0039] Advantageously, the vertical geothermal probe comprises a filtration member mounted on the first tube at the lower end of the second transfer portion.

[0040] L'organe de filtration peut comporter sur le premier tube, au niveau de l'extrémité inférieure de la deuxième portion de transfert un segment de tube perforé répartiteur du fluide caloporteur adapté pour la charge et la décharge et dont la somme des débits de chaque trou est égale au débit du fluide caloporteur. [0040] The filtration member may comprise on the first tube, at the level of the lower end of the second transfer portion, a segment of perforated tube distributing the heat transfer fluid adapted for charging and discharging and the sum of the flow rates of each hole being equal to the flow rate of the heat transfer fluid.

[0041] L'organe de filtration peut être agencée pour autoriser le passage du fluide caloporteur du volume interne du premier tube vers le volume formé entre le premier tube et le deuxième tube, et inversement. [0041] The filtration member may be arranged to allow the passage of the heat transfer fluid from the internal volume of the first tube to the volume formed between the first tube and the second tube, and vice versa.

[0042] Avantageusement, la sonde géothermique verticale comporte un organe de fermeture du deuxième tube, monté sur le deuxième tube au niveau de l'extrémité inférieure de la deuxième portion de transfert. [0043] L'organe de fermeture peut comporter un segment de tube plein. L'organe de fermeture peut être étanche. L'organe de fermeture peut être monté au niveau d'une extrémité inférieure du deuxième tube, notamment dans la portion de transfert. [0042] Advantageously, the vertical geothermal probe comprises a member for closing the second tube, mounted on the second tube at the lower end of the second transfer portion. [0043] The closure member may comprise a solid tube segment. The closure member may be sealed. The closure member may be mounted at a lower end of the second tube, in particular in the transfer portion.

[0044] Avantageusement, le fluide caloporteur comporte un fluide liquide ou gazeux. [0044] Advantageously, the heat transfer fluid comprises a liquid or gaseous fluid.

[0045] Le fluide caloporteur peut permettre d'assurer l'échange d'énergie entre les tubes et le sous-sol. Le fluide caloporteur peut être adapté pour circuler dans les tubes de manière suffisamment lente pour permettre le transfert d'énergie calorifique par conduction. [0045] The heat transfer fluid may allow the exchange of energy between the tubes and the subsoil. The heat transfer fluid may be adapted to circulate in the tubes in a sufficiently slow manner to allow the transfer of heat energy by conduction.

[0046] Le fluide caloporteur peut comporter de l'eau, du glycol, de l'huile thermique et/ou tout autre liquide pouvant accepter une charge calorifique biodégradable et sans impact sur l'environnement. [0046] The heat transfer fluid may comprise water, glycol, thermal oil and/or any other liquid capable of accepting a biodegradable heat load without impact on the environment.

[0047] Avantageusement, le système de transformation d'une énergie thermique d'un fluide caloporteur comporte une pompe à chaleur, une machine frigorifique, et/ou une turbine. [0047] Advantageously, the system for transforming thermal energy from a heat transfer fluid comprises a heat pump, a refrigeration machine, and/or a turbine.

[0048] Le système de transformation peut comporter selon les usages énergétiques à couvrir, une fourniture de l'énergie calorifique en directe et/ou une fourniture d'énergie calorifique associée à une pompe à chaleur et/ou une production d'énergie frigorifique associée à une machine frigorifique et/ou une fourniture d'électricité associée à un module de fabrication d'électricité. [0048] The transformation system may comprise, depending on the energy uses to be covered, a direct supply of heat energy and/or a supply of heat energy associated with a heat pump and/or a production of refrigeration energy associated with a refrigeration machine and/or a supply of electricity associated with an electricity production module.

Brève description des figures. Brief description of the figures.

[0049] D'autres avantages et caractéristiques de la présente invention sont maintenant décrits à l'aide d'exemples uniquement illustratifs et nullement limitatifs de la portée de l'invention, et à partir des dessins annexés, dessins sur lesquels les différentes figures représentent : [0049] Other advantages and characteristics of the present invention are now described with the aid of examples which are purely illustrative and in no way limitative of the scope of the invention, and from the attached drawings, drawings in which the various figures represent:

[0050] [Fig. 1] représente schématiquement une vue en coupe de deux sondes verticales coaxiales insérées dans un sol, l'une des sondes étant dans un état de charge et l'autre des sondes étant dans un état de décharge, selon un mode de réalisation. [0050] [Fig. 1] schematically represents a sectional view of two coaxial vertical probes inserted into a ground, one of the probes being in a charging state and the other of the probes being in a discharging state, according to one embodiment.

[0051] [Fig. 2] représente schématiquement une vue en perspective en coupe d'une tête de sonde verticale selon un mode de réalisation [0052] [Fig. 3] représente schématiquement une vue en perspective en coupe d'un pied de sonde verticale selon un mode de réalisation. [0051] [Fig. 2] schematically represents a perspective view in section of a vertical probe head according to one embodiment [0052] [Fig. 3] schematically represents a perspective view in section of a vertical probe foot according to one embodiment.

[0053] [Fig. 4] représente schématiquement une vue en perspective en coupe d'une sonde verticale intégrée dans un forage dans le sol, selon un mode de réalisation. [0053] [Fig. 4] schematically represents a perspective view in section of a vertical probe integrated into a borehole in the ground, according to one embodiment.

[0054] [Fig. 5] représente schématiquement une vue en perspective en coupe d'un système géothermique de stockage d'énergie souterrain provenant d'énergie solaire et comportant une pluralité de sondes verticales selon un mode de réalisation. [0054] [Fig. 5] schematically represents a perspective view in section of a geothermal system for storing underground energy from solar energy and comprising a plurality of vertical probes according to one embodiment.

[0055] [Fig. 6] représente schématiquement une vue en perspective en coupe d'un système géothermique de stockage d'énergie souterrain provenant d'énergie fatale et comportant une pluralité de sondes verticales selon un mode de réalisation. [0055] [Fig. 6] schematically represents a perspective view in section of a geothermal system for storing underground energy from fatal energy and comprising a plurality of vertical probes according to one embodiment.

[0056] Dans la description qui suit, les éléments identiques, par structure ou par fonction, apparaissant sur différentes figures conservent, sauf précision contraire, les mêmes références. [0056] In the following description, elements which are identical, by structure or by function, appearing in different figures retain, unless otherwise specified, the same references.

Description d'un mode de réalisation. Description of an embodiment.

[0057] La [Fig. 1] décrit un ensemble de sondes verticales 120 coaxiales selon un mode de réalisation de l'invention. Les sondes verticales 120 sont décrites en lien avec les [Fig. 2], [Fig. 3] et [Fig. 4], Les sondes verticales 120 sont adaptées pour être comprises dans un système géothermique 1 décrit en [Fig. 5] et [Fig. 6], [0057] [Fig. 1] describes a set of coaxial vertical probes 120 according to an embodiment of the invention. The vertical probes 120 are described in connection with [Fig. 2], [Fig. 3] and [Fig. 4], The vertical probes 120 are adapted to be included in a geothermal system 1 described in [Fig. 5] and [Fig. 6],

[0058] La [Fig. 5] décrit un système géothermique 1, comportant un système de production d'énergie 10 apte à chauffer un fluide caloporteur. Le fluide caloporteur permet de circuler en circuit fermé pour prélever ou injecter l'énergie provenant d'un sous- sol. Le système de production d'énergie 10 de ce mode de réalisation comporte une centrale solaire. La centrale solaire comporte des capteurs solaires thermiques pour la production d'énergie calorifique, frigorifique et/ou électrique. [0058] [Fig. 5] describes a geothermal system 1, comprising an energy production system 10 capable of heating a heat transfer fluid. The heat transfer fluid allows circulation in a closed circuit to collect or inject energy from a subsoil. The energy production system 10 of this embodiment comprises a solar power plant. The solar power plant comprises thermal solar collectors for the production of heat, cooling and/or electrical energy.

[0059] La [Fig. 6] décrit un système géothermique 1, comportant un système de production d'énergie 10 apte à chauffer un fluide caloporteur. Le fluide caloporteur permet de circuler en circuit fermé pour prélever ou injecter l'énergie provenant d'un sous- sol. Le système de production d'énergie 10 de ce mode de réalisation utilise de l'énergie fatale. [0060] Le système géothermique 1 comporte un système de transformation 11 d'une énergie thermique du fluide caloporteur. Le système de transformation 11 comporte une pompe à chaleur, une machine frigorifique, et/ou une turbine. [0059] [Fig. 6] describes a geothermal system 1, comprising an energy production system 10 capable of heating a heat transfer fluid. The heat transfer fluid allows circulation in a closed circuit to draw or inject energy from a subsoil. The energy production system 10 of this embodiment uses fatal energy. [0060] The geothermal system 1 comprises a transformation system 11 of thermal energy from the heat transfer fluid. The transformation system 11 comprises a heat pump, a refrigeration machine, and/or a turbine.

[0061] Le système géothermique 1 comporte un système de stockage d'énergie 12 géothermique décrit en [Fig. 2] et en [Fig. 4], Le système de stockage d'énergie 12 comporte un circuit fermé de circulation du fluide caloporteur. Le système de stockage d'énergie 12 comporte une première section de transfert thermique reliée au système de production d'énergie 10, une deuxième section de transfert thermique reliée au système de transformation 11 et au moins une sonde géothermique verticale 120 agencée dans un forage ménagé dans un sol et apte à stocker ou extraire de l'énergie thermique depuis ce sol. Dans le mode de réalisation décrit en [Fig. 1], le système de stockage d'énergie 12 comporte deux sondes 120 et dans le mode de réalisation décrit en [Fig. 5] et en [Fig. 6], le système de stockage d'énergie 12 comporte une pluralité de sondes 120 géothermiques verticales. [0061] The geothermal system 1 comprises a geothermal energy storage system 12 described in [Fig. 2] and in [Fig. 4], The energy storage system 12 comprises a closed circuit for circulating the heat transfer fluid. The energy storage system 12 comprises a first heat transfer section connected to the energy production system 10, a second heat transfer section connected to the transformation system 11 and at least one vertical geothermal probe 120 arranged in a borehole made in a ground and capable of storing or extracting thermal energy from this ground. In the embodiment described in [Fig. 1], the energy storage system 12 comprises two probes 120 and in the embodiment described in [Fig. 5] and in [Fig. 6], the energy storage system 12 comprises a plurality of vertical geothermal probes 120.

[0062] La première section de transfert thermique est un premier organe de circulation d'un fluide caloporteur chauffé par le système de production d'énergie 10 dans la sonde géothermique verticale 120 pour stocker de l'énergie thermique dans le sol S. La deuxième section de transfert thermique est un deuxième organe de circulation d'un fluide caloporteur stocké dans le système de stockage d'énergie géothermique 12 vers le système de transformation 11 pour extraire l'énergie thermique du sol S. Le système de stockage d'énergie 12 permet de stocker de la chaleur en exploitant l'inertie thermique du sous-sol S à travers la capacité calorifique des éléments composant le sous-sol S dans lequel les sondes géothermiques verticales 120 sont installées. [0062] The first heat transfer section is a first circulation member of a heat transfer fluid heated by the energy production system 10 in the vertical geothermal probe 120 to store thermal energy in the ground S. The second heat transfer section is a second circulation member of a heat transfer fluid stored in the geothermal energy storage system 12 to the transformation system 11 to extract thermal energy from the ground S. The energy storage system 12 makes it possible to store heat by exploiting the thermal inertia of the subsoil S through the heat capacity of the elements making up the subsoil S in which the vertical geothermal probes 120 are installed.

[0063] La sonde géothermique verticale 120 comporte une première portion froide 120.1 s'étendant dans un forage et une deuxième portion de transfert 120.2 s'étendant dans le forage en étant agencée en-dessous de la première portion froide 120.1. [0063] The vertical geothermal probe 120 comprises a first cold portion 120.1 extending into a borehole and a second transfer portion 120.2 extending into the borehole while being arranged below the first cold portion 120.1.

[0064] La sonde géothermique verticale 120 comporte un premier tube 120.4 et un deuxième tube 120.5 agencé coaxialement autour du premier tube 120.4. Les tubes forment ensemble les première 120.1 et deuxième portions 120.2 de la sonde géothermique verticale 120. [0064] The vertical geothermal probe 120 comprises a first tube 120.4 and a second tube 120.5 arranged coaxially around the first tube 120.4. The tubes together form the first 120.1 and second 120.2 portions of the vertical geothermal probe 120.

[0065] Le système de stockage d'énergie géothermique 12 comporte un organe d'isolation thermique 120.3 s'étendant dans le forage uniquement au niveau de la première portion froide 120.1. La deuxième portion de transfert 120.2 sans organe d'isolation thermique 120.3 cède sa chaleur au substrat qui l'entoure. L'organe d'isolation thermique 120.3 et inséré à l'intérieur du deuxième tube 120.5. l'organe d'isolation thermique 120.3 est monté contre une paroi interne du deuxième tube 120.5 et à distance du premier tube 120.4. [0065] The geothermal energy storage system 12 comprises a thermal insulation member 120.3 extending into the borehole only at the first cold portion 120.1. The second transfer portion 120.2 without thermal insulation member 120.3 gives off its heat to the substrate surrounding it. The thermal insulation member 120.3 is inserted inside the second tube 120.5. The thermal insulation member 120.3 is mounted against an internal wall of the second tube 120.5 and at a distance from the first tube 120.4.

[0066] Le volume interne du premier tube 120.4 définit un volume d'injection du fluide caloporteur chauffé par le système de production d'énergie 10 et le volume formé entre le premier tube 120.4 et le deuxième tube 120.5 définit un volume de transfert d'énergie thermique vers le sol S pour son stockage lors d'un cycle de charge. Le volume formé entre le premier tube 120.4 et le deuxième tube 120.5 définit un volume de transfert d'énergie thermique depuis le sol S. Le volume interne du premier tube 120.4 définit un volume d'extraction du fluide caloporteur chauffé par le sol S vers le système de transformation 11 lors d'un cycle de décharge. [0066] The internal volume of the first tube 120.4 defines a volume for injecting the heat transfer fluid heated by the energy production system 10 and the volume formed between the first tube 120.4 and the second tube 120.5 defines a volume for transferring thermal energy to the ground S for its storage during a charging cycle. The volume formed between the first tube 120.4 and the second tube 120.5 defines a volume for transferring thermal energy from the ground S. The internal volume of the first tube 120.4 defines a volume for extracting the heat transfer fluid heated by the ground S to the transformation system 11 during a discharging cycle.

[0067] Lors d'un cycle de charge, la température d'injection du fluide caloporteur à l'entrée de la sonde 120 est compris entre 90 et 250°C. [0067] During a charging cycle, the injection temperature of the heat transfer fluid at the inlet of the probe 120 is between 90 and 250°C.

[0068] Lors d'un cycle de décharge, la température d'injection du fluide caloporteur à l'entrée de la sonde 120 est supérieur à 60°C et la température du fluide caloporteur à la sortie de la sonde 120 est supérieur à 90°C. [0068] During a discharge cycle, the injection temperature of the heat transfer fluid at the inlet of the probe 120 is greater than 60°C and the temperature of the heat transfer fluid at the outlet of the probe 120 is greater than 90°C.

[0069] Le système géothermique 1 comporte un système de contrôle d'un cycle de charge et de décharge du système de stockage 12, agencé pour contrôler la circulation du fluide caloporteur dans le circuit fermé de circulation de la première section vers la sonde géothermique 120 ou de la sonde géothermique 120 vers la deuxième section en fonction d'une instruction de charge ou de décharge du système géothermique 1. [0069] The geothermal system 1 comprises a system for controlling a charge and discharge cycle of the storage system 12, arranged to control the circulation of the heat transfer fluid in the closed circulation circuit from the first section to the geothermal probe 120 or from the geothermal probe 120 to the second section as a function of a charge or discharge instruction from the geothermal system 1.

[0070] Le premier tube 120.4 comporte une pluralité de sections de tubes agencées les unes après les autres et maintenues deux à deux par un élément de fixation 120.6. Le deuxième tube 120.5 comporte une pluralité de sections de tubes agencées les unes après les autres et maintenues deux à deux par un élément de fixation 120.6. Les éléments de fixation 120.6 sont avantageusement des raccords clips. Les éléments de fixation 120.6 sont étanches. Les éléments de fixation 120.6 sont préisolés. L'utilisation d'une pluralité de tubes maintenus deux à deux par des éléments de fixation permet l'utilisation d'une sonde 120 de 1000 m de profondeur. [0071] La sonde géothermique verticale 120 comporte un organe de fermeture 120.8 du deuxième tube 120.5. L'organe de fermeture 120.8 est monté sur le deuxième tube 120.5 au niveau de l'extrémité inférieure de la deuxième portion de transfert. L'organe de fermeture 120.8 comporte un segment de tube plein. L'organe de fermeture 120.8 est étanche. L'organe de fermeture 120.8 est monté au niveau d'une extrémité inférieure du deuxième tube 120.5, notamment dans la portion de transfert. [0070] The first tube 120.4 comprises a plurality of tube sections arranged one after the other and held two by two by a fixing element 120.6. The second tube 120.5 comprises a plurality of tube sections arranged one after the other and held two by two by a fixing element 120.6. one after the other and held in pairs by a fixing element 120.6. The fixing elements 120.6 are advantageously clip connectors. The fixing elements 120.6 are watertight. The fixing elements 120.6 are pre-insulated. The use of a plurality of tubes held in pairs by fixing elements allows the use of a probe 120 of 1000 m depth. [0071] The vertical geothermal probe 120 comprises a closing member 120.8 of the second tube 120.5. The closing member 120.8 is mounted on the second tube 120.5 at the lower end of the second transfer portion. The closing member 120.8 comprises a solid tube segment. The closing member 120.8 is watertight. The closing member 120.8 is mounted at a lower end of the second tube 120.5, in particular in the transfer portion.

[0072] La sonde géothermique verticale 120 comporte une couche externe d'échange thermique agencée entre une paroi interne du forage et une paroi externe du deuxième tube 120.5. [0072] The vertical geothermal probe 120 comprises an external heat exchange layer arranged between an internal wall of the borehole and an external wall of the second tube 120.5.

[0073] La sonde géothermique verticale 120 comporte un organe de filtration 120.7 monté sur le premier tube 120.4 au niveau de l'extrémité inférieure de la deuxième portion de transfert. L'organe de filtration 120.7 comporte sur le premier tube 120.4, au niveau de l'extrémité inférieure de la deuxième portion de transfert, un segment de tube perforé répartiteur du fluide caloporteur adapté pour la charge et la décharge et dont la somme des débits de chaque trou est égale au débit du fluide caloporteur. L'organe de filtration 120.7 est agencé pour autoriser le passage du fluide caloporteur du volume interne du premier tube 120.4 vers le volume formé entre le premier tube 120.4 et le deuxième tube 120.5, et inversement. [0073] The vertical geothermal probe 120 comprises a filtration member 120.7 mounted on the first tube 120.4 at the lower end of the second transfer portion. The filtration member 120.7 comprises on the first tube 120.4, at the lower end of the second transfer portion, a segment of perforated tube distributing the heat transfer fluid adapted for charging and discharging and the sum of the flow rates of each hole of which is equal to the flow rate of the heat transfer fluid. The filtration member 120.7 is arranged to allow the passage of the heat transfer fluid from the internal volume of the first tube 120.4 to the volume formed between the first tube 120.4 and the second tube 120.5, and vice versa.

[0074] Le système de transformation 11 diriger l'énergie produite vers les bâtiments à alimenter. [0074] The transformation system 11 directs the energy produced to the buildings to be supplied.

[0075] Dans le mode de réalisation décrit en [Fig. 5], le circuit fermé de circulation du système de stockage d'énergie 12 comporte une pluralité de sondes géothermiques verticales 120 reliées en parallèle et/ou en série à un collecteur 13 relié aux premières et deuxième section de transfert. Le collecteur 13 est agencé pour distribuer le fluide caloporteur vers chacune des sondes géothermiques verticales 120. Le collecteur 13 est agencé pour répartir le fluide caloporteur vers chacune des sondes géothermiques verticales 120. [0075] In the embodiment described in [Fig. 5], the closed circulation circuit of the energy storage system 12 comprises a plurality of vertical geothermal probes 120 connected in parallel and/or in series to a collector 13 connected to the first and second transfer sections. The collector 13 is arranged to distribute the heat transfer fluid to each of the geothermal probes. vertical 120. The collector 13 is arranged to distribute the heat transfer fluid to each of the vertical geothermal probes 120.

[0076] Dans le mode de réalisation décrit en [Fig. 6], le circuit fermé de circulation du système de stockage d'énergie 12 comporte une pluralité de sondes géothermiques verticales 120 reliées en parallèle et/ou en série à un collecteur 13 relié aux premières et deuxième section de transfert. Le collecteur 13 est agencé pour distribuer le fluide caloporteur vers chacune des sondes géothermiques verticales 120. Le collecteur 13 est agencé pour répartir le fluide caloporteur vers chacune des sondes géothermiques verticales 120. [0076] In the embodiment described in [Fig. 6], the closed circulation circuit of the energy storage system 12 comprises a plurality of vertical geothermal probes 120 connected in parallel and/or in series to a collector 13 connected to the first and second transfer sections. The collector 13 is arranged to distribute the heat transfer fluid to each of the vertical geothermal probes 120. The collector 13 is arranged to distribute the heat transfer fluid to each of the vertical geothermal probes 120.

[0077] La description qui précède explique clairement comment l'invention permet d'atteindre les objectifs qu'elle s'est fixée, à savoir proposer un système géothermique permettant de lutter contre le réchauffement climatique par la suppression d'utilisation des énergies fossiles et la réduction des émissions de gaz à effet de serre et protégeant l'environnement dans lequel est intégré le système tout en produisant de l'énergie calorifique, et/ou frigorifique et/ou électrique, en proposant un système géothermique, comportant un système de production d'énergie apte à chauffer un fluide caloporteur ; un système de transformation d'une énergie thermique d'un fluide caloporteur ; un système de stockage d'énergie géothermique comportant au moins un circuit fermé de circulation d'un fluide caloporteur comportant au moins une sonde géothermique verticale comportant un premier tube et un deuxième tube agencé coaxialement autour dudit premier tube, ladite sonde étant agencée dans un forage ménagé dans un sol et apte à stocker ou extraire de l'énergie thermique depuis ce sol ; un système de contrôle d'un cycle de charge et de décharge du système de stockage caractérisé en ce que la sonde géothermique comporte une première portion froide et une deuxième portion de transfert agencée en-dessous de la première portion froide et en ce que le système de stockage d'énergie géothermique comporte un organe d'isolation thermique inséré contre une paroi du deuxième tube s'étendant dans le forage uniquement au niveau de la première portion froide. [0077] The foregoing description clearly explains how the invention makes it possible to achieve the objectives it has set for itself, namely to propose a geothermal system making it possible to combat global warming by eliminating the use of fossil fuels and reducing greenhouse gas emissions and protecting the environment in which the system is integrated while producing heat, and/or cooling and/or electrical energy, by proposing a geothermal system, comprising an energy production system capable of heating a heat transfer fluid; a system for transforming thermal energy from a heat transfer fluid; a geothermal energy storage system comprising at least one closed circuit for circulating a heat transfer fluid comprising at least one vertical geothermal probe comprising a first tube and a second tube arranged coaxially around said first tube, said probe being arranged in a borehole made in a ground and capable of storing or extracting thermal energy from this ground; a system for controlling a charge and discharge cycle of the storage system characterized in that the geothermal probe comprises a first cold portion and a second transfer portion arranged below the first cold portion and in that the geothermal energy storage system comprises a thermal insulation member inserted against a wall of the second tube extending into the borehole only at the level of the first cold portion.

[0078] En tout état de cause, l'invention ne saurait se limiter aux modes de réalisation spécifiquement décrits dans ce document, et s'étend en particulier à tous moyens équivalents et à toute combinaison techniquement opérante de ces moyens. On pourra en particulier envisager : [0078] In any event, the invention cannot be limited to the embodiments specifically described in this document, and extends in particular to all means equivalents and any technically effective combination of these means. In particular, we may consider:

Le fluide caloporteur peut être un fluide caloporteur liquide. The heat transfer fluid can be a liquid heat transfer fluid.

Le fluide caloporteur peut être un fluide caloporteur gazeux. The heat transfer fluid can be a gaseous heat transfer fluid.

Le système de production d'énergie peut comporter une centrale de récupération d'énergie fatale. The energy production system may include a fatal energy recovery plant.

Dans un autre mode de réalisation, le système de production d'énergie peut comporter toute source d'énergie dite renouvelable et/ou source d'énergie intermittente ou continue, locale, décarbonée et renouvelable. In another embodiment, the energy production system may comprise any so-called renewable energy source and/or intermittent or continuous, local, decarbonized and renewable energy source.

Dans un autre mode de réalisation, le système de production d'énergie peut comporter une source d'énergie thermique renouvelable. In another embodiment, the energy production system may include a renewable thermal energy source.

Dans un mode différent de réalisation, le système de production d'énergie peut comporter une source d'énergie thermique de récupération supérieure à 70°, notamment supérieure à 90°. In a different embodiment, the energy production system may comprise a source of recovery thermal energy greater than 70°, in particular greater than 90°.

Le premier tube peut être en acier pré isolé. Le premier tube peut être sous vide. Le premier tube peut ne pas être sous vide. The first tube may be pre-insulated steel. The first tube may be vacuum. The first tube may not be vacuum.

Le deuxième tube peut être en acier pré isolé. Le deuxième tube peut être sous vide. Le deuxième tube peut ne pas être sous vide. The second tube may be pre-insulated steel. The second tube may be evacuated. The second tube may not be evacuated.

Les éléments de fixation peuvent être de type manchon vissé et/ou crante. The fixing elements can be of the screwed sleeve and/or notched type.

Claims

Revendications Claims [Revendication 1] Système géothermique (1), comportant : [Claim 1] Geothermal system (1), comprising: Un système de production d'énergie (10) apte à chauffer un fluide caloporteur ; An energy production system (10) capable of heating a heat transfer fluid; Un système de transformation (11) d'une énergie thermique d'un fluide caloporteur ; A system for transforming (11) thermal energy from a heat transfer fluid; Un système de stockage d'énergie géothermique (12) comportant au moins un circuit fermé de circulation d'un fluide caloporteur comportant au moins une première section de transfert thermique reliée au système de production d'énergie (10), une deuxième section de transfert thermique reliée au système de transformation (11) et au moins une sonde géothermique (120) verticale comportant un premier tube (120.4) et un deuxième tube (120.5) agencé coaxialement autour dudit premier tube (120.4), ladite sonde (120) étant agencée dans un forage (F) ménagé dans un sol (S) et apte à stocker ou extraire de l'énergie thermique depuis ce sol (S) ; A geothermal energy storage system (12) comprising at least one closed circuit for circulating a heat transfer fluid comprising at least a first heat transfer section connected to the energy production system (10), a second heat transfer section connected to the transformation system (11) and at least one vertical geothermal probe (120) comprising a first tube (120.4) and a second tube (120.5) arranged coaxially around said first tube (120.4), said probe (120) being arranged in a borehole (F) made in a ground (S) and capable of storing or extracting thermal energy from this ground (S); Un système de contrôle d'un cycle de charge et de décharge du système de stockage (12), agencé pour contrôler la circulation du fluide caloporteur dans le circuit fermé de circulation de la première section vers la sonde géothermique ou de la sonde géothermique vers la deuxième section en fonction d'une instruction de charge ou de décharge du système géothermique (1) ; A system for controlling a charge and discharge cycle of the storage system (12), arranged to control the circulation of the heat transfer fluid in the closed circulation circuit from the first section to the geothermal probe or from the geothermal probe to the second section according to a charge or discharge instruction of the geothermal system (1); Caractérisé en ce que la sonde géothermique (1) verticale comporte une première portion froide (120.1) s'étendant dans le forage (F) et une deuxième portion de transfert (120.Characterized in that the vertical geothermal probe (1) comprises a first cold portion (120.1) extending into the borehole (F) and a second transfer portion (120. 2) s'étendant dans le forage (F) en étant agencée en-dessous de la première portion froide (120.1) et en ce que le système de stockage d'énergie géothermique (1) comporte un organe d'isolation thermique (120.3) inséré contre une paroi du deuxième tube (120.5), s'étendant dans le forage (F) uniquement au niveau de la première portion froide (120.1). [Revendication 2] Système géothermique (1) selon la revendication 3, caractérisé en ce que le circuit fermé de circulation du système de stockage d'énergie (12) comporte une pluralité de sondes géothermiques (120) verticales reliées en parallèle et/ou en série à un collecteur (13) relié aux premières et deuxième section de transfert et agencé pour distribuer le fluide caloporteur vers chacune des sondes géothermiques (120) verticales. 2) extending into the borehole (F) while being arranged below the first cold portion (120.1) and in that the geothermal energy storage system (1) comprises a thermal insulation member (120.3) inserted against a wall of the second tube (120.5), extending into the borehole (F) only at the level of the first cold portion (120.1). [Claim 2] Geothermal system (1) according to claim 3, characterized in that the closed circulation circuit of the energy storage system (12) comprises a plurality of vertical geothermal probes (120) connected in parallel and/or in series to a collector (13) connected to the first and second transfer sections and arranged to distribute the heat transfer fluid to each of the vertical geothermal probes (120). [Revendication 3] Système géothermique (1) selon l'une des revendications précédentes, caractérisé en ce que le système de production d'énergie (10) comporte une centrale solaire et/ou une centrale de récupération d'énergie. [Claim 3] Geothermal system (1) according to one of the preceding claims, characterized in that the energy production system (10) comprises a solar power plant and/or an energy recovery plant. [Revendication 4] Système géothermique (1) selon l'une des revendications précédentes, caractérisé en ce que la sonde géothermique (120) verticale comporte un premier tube (120.4) et un deuxième tube (120.5) agencé coaxialement autour du premier tube (120.4), les tubes (120.4 ; 120.5) formant ensemble lesdites première (120.1) et deuxième (120.2) portions de la sonde géothermique (120) verticale, le volume interne du premier tube (120.4) définissant un volume d'injection du fluide caloporteur chauffé par le système de production d'énergie (10) et le volume formé entre le premier tube (120.4) et le deuxième tube (120.5) définissant un volume de transfert d'énergie thermique vers le sol (S) pour son stockage lors d'un cycle de charge ; et le volume formé entre le premier tube (120.4) et le deuxième tube (120.5) définissant un volume de transfert d'énergie thermique depuis le sol (S) et le volume interne du premier tube (120.4) définissant un volume d'extraction du fluide caloporteur chauffé par le sol (S) vers le système de transformation lors d'un cycle de décharge. [Claim 4] Geothermal system (1) according to one of the preceding claims, characterized in that the vertical geothermal probe (120) comprises a first tube (120.4) and a second tube (120.5) arranged coaxially around the first tube (120.4), the tubes (120.4; 120.5) together forming said first (120.1) and second (120.2) portions of the vertical geothermal probe (120), the internal volume of the first tube (120.4) defining a volume for injecting the heat transfer fluid heated by the energy production system (10) and the volume formed between the first tube (120.4) and the second tube (120.5) defining a volume for transferring thermal energy to the ground (S) for its storage during a charging cycle; and the volume formed between the first tube (120.4) and the second tube (120.5) defining a volume for transferring thermal energy from the ground (S) and the internal volume of the first tube (120.4) defining a volume for extracting the heat transfer fluid heated by the ground (S) towards the transformation system during a discharge cycle. [Revendication 5] Système géothermique (1) selon l'une des revendications précédentes, caractérisé en ce que ladite sonde géothermique (120)verticale comporte une couche externe d'échange thermique agencée entre une paroi interne du forage (F) et une paroi externe du deuxième tube (120.5).[Claim 5] Geothermal system (1) according to one of the preceding claims, characterized in that said vertical geothermal probe (120) comprises an external heat exchange layer arranged between an internal wall of the borehole (F) and an external wall of the second tube (120.5). [Revendication 6] Système géothermique (1) selon l'une des revendications 4 ou 5, caractérisé en ce que le premier tube (120.4) comporte une pluralité de sections de tubes agencées les unes après les autres et maintenues deux à deux par un élément de fixation (120.6). [Claim 6] Geothermal system (1) according to one of claims 4 or 5, characterized in that the first tube (120.4) comprises a plurality of tube sections arranged one after the other and held two by two by a fixing element (120.6). [Revendication 7] Système géothermique (1) selon l'une des revendications 4 à 6, caractérisé en ce que ladite sonde géothermique (120) verticale comporte un organe de filtration (120.7) monté sur le premier tube (120.4) au niveau de l'extrémité inférieure de la deuxième portion de transfert (120.2). [Claim 7] Geothermal system (1) according to one of claims 4 to 6, characterized in that said vertical geothermal probe (120) comprises a filtration member (120.7) mounted on the first tube (120.4) at the lower end of the second transfer portion (120.2). [Revendication 8] Système géothermique (1) selon l'une des revendications 4 à 7, caractérisé en ce que ladite sonde géothermique (120) verticale comporte un organe de fermeture (120.8) du deuxième tube (120.5), monté sur le deuxième tube (120.5) au niveau de l'extrémité inférieure de la deuxième portion de transfert (120.2). [Claim 8] Geothermal system (1) according to one of claims 4 to 7, characterized in that said vertical geothermal probe (120) comprises a closing member (120.8) of the second tube (120.5), mounted on the second tube (120.5) at the lower end of the second transfer portion (120.2). [Revendication 9] Système géothermique (1) selon l'une des revendications précédentes, caractérisé en ce que le fluide caloporteur comporte un fluide liquide ou gazeux. [Claim 9] Geothermal system (1) according to one of the preceding claims, characterized in that the heat transfer fluid comprises a liquid or gaseous fluid. [Revendication 10]Système géothermique (1) selon l'une des revendications précédentes, caractérisé en ce que le système de transformation (11) d'une énergie thermique d'un fluide caloporteur comporte une pompe à chaleur, une machine frigorifique, et/ou une turbine. [Claim 10] Geothermal system (1) according to one of the preceding claims, characterized in that the system (11) for transforming thermal energy from a heat transfer fluid comprises a heat pump, a refrigeration machine, and/or a turbine.
PCT/EP2024/064138 2023-05-25 2024-05-22 Geothermal system comprising an energy production system Pending WO2024240841A1 (en)

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FRFR2305194 2023-05-25

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US20120175077A1 (en) * 2009-06-09 2012-07-12 Reijer Willem Lehmann Geothermal Heat Exchanger
US20150219365A1 (en) * 2012-09-05 2015-08-06 Greenfield Master Ipco Ltd Thermal energy system and method of operation
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