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EP1941160A1 - Procede et dispositif pour produire de l'energie mecanique ou electrique a partir de chaleur - Google Patents

Procede et dispositif pour produire de l'energie mecanique ou electrique a partir de chaleur

Info

Publication number
EP1941160A1
EP1941160A1 EP06806086A EP06806086A EP1941160A1 EP 1941160 A1 EP1941160 A1 EP 1941160A1 EP 06806086 A EP06806086 A EP 06806086A EP 06806086 A EP06806086 A EP 06806086A EP 1941160 A1 EP1941160 A1 EP 1941160A1
Authority
EP
European Patent Office
Prior art keywords
heat
fluid
pressure
turbomachine
thermal
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.)
Withdrawn
Application number
EP06806086A
Other languages
German (de)
English (en)
Inventor
Alf Gundermann
Karl Mrukwia
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP1941160A1 publication Critical patent/EP1941160A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
    • F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C1/00—Gas-turbine plants characterised by the use of hot gases or unheated pressurised gases, as the working fluid
    • F02C1/04—Gas-turbine plants characterised by the use of hot gases or unheated pressurised gases, as the working fluid the working fluid being heated indirectly
    • F02C1/05—Gas-turbine plants characterised by the use of hot gases or unheated pressurised gases, as the working fluid the working fluid being heated indirectly characterised by the type or source of heat, e.g. using nuclear or solar energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G4/00—Devices for producing mechanical power from geothermal energy
    • F03G4/074—Safety arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
    • F24T10/00—Geothermal collectors
    • F24T10/30—Geothermal collectors using underground reservoirs for accumulating working fluids or intermediate fluids
    • 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
    • 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
    • Y02E10/40—Solar thermal energy, e.g. solar towers
    • Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines

Definitions

  • the present invention relates to a method for recovering mechanical or electrical energy from heat.
  • the invention relates to a device for carrying out the method.
  • the type of energy production is oil, gas or coal power plants, in which energy stored in chemical compounds is converted into heat, and nuclear power plants in which energy stored in atomic nuclei is converted into heat. A large part of the heat falls as to
  • a power station that is able to use heat at a low temperature level and that can be used, for example, for solar energy is disclosed in DE 101 26 403 A1.
  • the power station comprises a circuit with a high-pressure vessel, a low-pressure vessel, a turbine or piston machine connected between the two pressure vessels and a pressure treatment device.
  • liquid carbon dioxide circulates under high pressure, which drives the turbine or piston engine.
  • the pressure of the liquid carbon dioxide at 10 0 C at 50 atmospheres and at 2O 0 C at 100 atmospheres.
  • the object of the present invention is to provide an improved method and an improved device for recovering mechanical or electrical energy from heat, with which the recovery of mechanical or electrical energy from heat reservoirs with relatively low temperatures and in particular from geothermal energy is possible.
  • the method according to the invention for obtaining mechanical energy from heat comprises the steps:
  • the thermal fluid is selected such that by utilizing a temperature spread with a maximum temperature of not more than 13O 0 C, in particular with a maximum temperature of not more than 60 ° C and preferably a maximum temperature of not more than 30 0 C, a vapor pressure difference of at least 0.5 MPa, preferably at least 1.0 MPa and in particular at least 2.0 MPa.
  • the thermal fluid may be selected such that already at said temperatures and a temperature differential of no more than 5O 0 C, the vapor pressure difference of at least 0.5 MPa, preferably at least 1, 0 MPa and in particular at least 2 MPa can be achieved.
  • thermal fluid are, for example, ammonia (NH 3 ), ethane (C 2 H 6 ), propane (C 3 H 8 ) and in particular carbon dioxide (CO 2 ).
  • NH 3 ammonia
  • ethane C 2 H 6
  • propane C 3 H 8
  • CO 2 carbon dioxide
  • mixtures of the substances mentioned can be used.
  • the heat released when condensing the heat fluid can either be fed back into the circuit, ie together with the Heat of the heat source can be used to evaporate the heat fluid, or serve as heating heat.
  • the heat transfer to the thermal fluid is designed to maximize the pressure increase in the thermal fluid.
  • the turbomachine for example a turbine
  • the turbomachine can be driven.
  • carbon dioxide or ethane is used as a heating fluid
  • the method according to the invention can therefore be used in particular wherever only low temperatures can or should be used for energy production. It is conceivable, for example, to use the waste heat of industrial processes for energy production. In particular, however, the method can be used to obtain mechanical or electrical energy from geothermal energy.
  • a temperature spread of 10 0 C to 2O 0 C is sufficient to drive the turbine.
  • ethane (C 2 He) at 20 0 C has a vapor pressure of about 4 MPa, ie of about 40 atmospheres.
  • Carbon dioxide at 2O 0 C even has a vapor pressure of about 6 MPa, ie 60 atmospheres.
  • the vapor pressures of ethane and carbon dioxide at O 0 C are about 2.5 MPa (ethane), which corresponds to about 25 atmospheres, or about 3.5 MPa (carbon dioxide), which corresponds to about 35 atmospheres.
  • the method according to the invention may comprise the following further steps:
  • the thus configured inventive method makes it possible even at relatively low temperatures in the ground, for example, about 20 0 C, to use the geothermal energy for driving the turbomachine.
  • a refrigerant fluid coming fluids into consideration which at low pressure in a temperature range from 0 ° C to -3O evaporate 0 C, such as ammonia (NH 3), propane (C 3 H 8), butane (C 4 H 10), carbon dioxide ( CO 2 ), etc. Of course, mixtures of these substances can be used.
  • NH 3 ammonia
  • propane C 3 H 8
  • butane C 4 H 10
  • CO 2 carbon dioxide
  • the temperature of the soil in the region of the evaporation chamber is about 20 0 C, so evaporates the refrigerant fluid. Due to the low density of the gaseous refrigerant fluid rises this independently from the evaporation space.
  • the usable temperature spread is 20 0 C and more. In the circuit through which the thermal fluid flows, the heat of condensation of the refrigerant fluid is used to
  • the cooling fluid can be heated by suitable compression before the heat transfer to the thermal fluid even at higher temperatures than the 20 0 C of the soil.
  • suitable compression temperatures of up to 55 0 C in the compressed refrigerant fluid are possible at a temperature of 2O 0 C in the ground.
  • double compression even temperatures of up to about 130 ° C in the compressed refrigerant fluid can be achieved.
  • the high temperatures increase the number of usable as thermal fluid substances.
  • the circuit traversed by the refrigerant fluid represents a so-called compression refrigeration system, which is operated as a heat pump.
  • the mechanical or electrical power of the turbomachine can be regulated via the circulating cooling fluid flow.
  • the method according to the invention can be used, in particular, to drive an electric generator for generating electricity by means of the turbomachine, for example a turbine.
  • the thermal fluid is chosen such that by utilizing a
  • the heat fluid may be chosen so that even at the temperatures mentioned and a temperature spread of not more than 50 0 C the
  • MPa and preferably at least 2 MPa can be achieved.
  • ammonia (NH 3 ), ethane (C 2 H 6 ), propane are suitable as thermal fluid
  • the temperature in the heat fluid is increased, so that the previously liquid heat fluid evaporates, wherein an increase in pressure takes place in the corresponding part of the heat cycle.
  • the heat fluid is recompressed by the compressor and converted into the liquid state to restore the output pressure.
  • the heat generated during compression can be dissipated via a secondary heat circuit, which is coupled to the compressor via a heat exchanger.
  • the transferred in condensing the heat fluid to the secondary heat cycle heat can be recycled to the heat fluid together with the heat of the heat source and thus fed back into the heat cycle.
  • the device according to the invention may in particular be part of a device for obtaining mechanical or electrical energy from geothermal heat as a heat source.
  • a device for obtaining mechanical or electrical energy from geothermal heat as a heat source.
  • Such a device is then additionally equipped with a refrigeration cycle with a circulating refrigerant fluid therein.
  • the refrigeration cycle includes a geothermal probe to be sunk into a well bore into which liquid refrigerant fluid is injected and in which the liquid refrigerant fluid evaporates due to the geothermal heat of the soil surrounding the geothermal probe.
  • the refrigeration cycle includes a heat exchanger in which the vaporous refrigerant fluid condenses and couples the refrigeration cycle with the heat cycle.
  • the refrigeration cycle may also include a compressor connected between the geothermal probe and the heat exchanger.
  • a suitable refrigeration cycle is described, for example, in DE 10 2004 018 480 B3.
  • This configuration allows the use of geothermal energy to generate mechanical or electrical energy even at temperatures in the soil of about 20 ° C. Such temperatures are found almost everywhere in the world at a relatively shallow depth year-round in the ground.
  • the device described is therefore basically used worldwide for energy from geothermal energy.
  • this device may comprise a device for influencing the circulating in the refrigerant circuit cooling fluid flow. By regulating the cold fluid mass flow, the mechanical or electrical power of the system can then be controlled.
  • the at least one heat circuit comprises a pressure build-up space upstream of the turbomachine in the flow direction, in which the heat exchanger is arranged. Downstream of the turbomachine is a reservoir in which the recompressed thermal fluid is collected. The reservoir is connected to the pressure build-up space via a fluid line in which a valve, eg. a check valve is arranged such that a flow is prevented from the pressure build-up space in the reservoir, bypassing the turbomachine.
  • a valve eg. a check valve
  • the pressure build-up space is used to build up the pressure necessary for operating, for example, a turbine as a turbomachine.
  • heat is transferred from the heat source to the thermal fluid, which evaporates due to the heating in the pressure build-up space and experiences an increase in pressure.
  • the high pressure thermal fluid flows through the turbine, working in the turbine under relaxation and cooling. Because the turbine rotates further due to inertia, when the pressure in the pressure build-up space is no longer sufficient to drive the turbine, it still acts for a while as a pump which pumps heat fluid out of the pressure build-up space.
  • the relaxed and cooled thermal fluid is condensed, condensing again, and finally collected in the reservoir.
  • the valve is opened in the fluid line, so that the recompressed heat fluid flows from the reservoir via the fluid line into the pressure build-up space.
  • the heat fluid fed back into the pressure build-up space via the fluid line is then available for renewed heating and pressure increase.
  • the turbine alternately passes through phases in which it is driven by the thermal fluid and phases in which heat fluid from the reservoir is fed back into the pressure build-up space and evaporated in the pressure build-up space.
  • heat circuits are coupled to the heat source via heat exchangers, and these heat circuits each comprise a pressure build-up space, a reservoir and, for example, a turbine as turbomachine, it is possible to control the phases of the pressure build-up in the pressure build-up spaces of the individual circuits out of phase with each other. In this way, the generation of mechanical energy can be made uniform by the device according to the invention.
  • the Controlling the phases can be done in the presence of a refrigeration cycle, for example. By means of control valves in the refrigeration cycle, which enable the supply of refrigerant fluid to the individual heat exchangers phase-shifted and interrupt.
  • the turbomachine When electrical energy is to be generated with the device according to the invention, the turbomachine is coupled to at least one electric generator in order to drive it.
  • the device according to the invention it is possible to associate with the refrigeration cycle a further heat cycle, which is not used for driving the turbine, but for heating a device, for example a machine or a building.
  • the heat transferred to the associated secondary heat cycle when the heat fluid condenses in a compressor can also be used as heating heat, instead of returning it to the heat cycle via the pressure buildup container.
  • This embodiment can be useful and advantageous, in particular, if the device is to be suitable for end users who, for example, want to supply a building both with electricity and with heat.
  • FIG. 1 shows a circuit diagram for a device according to the invention for obtaining mechanical or electrical energy from geothermal energy.
  • Figure 2 shows a geothermal probe, as they can be used in the device according to the invention, in a schematic representation.
  • FIG. 3 shows the vapor pressure curves of various fluids.
  • An exemplary embodiment of the device according to the invention for extracting mechanical energy from geothermal energy is shown in FIG.
  • the device shown comprises a refrigeration cycle 1 and three heat exchangers 100, 200, 300 coupled to the refrigeration cycle 1 via heat exchangers 3, 5, 7.
  • the refrigeration cycle 1 comprises a geothermal probe 9, the three heat exchangers 3, 5, 7 and a compressor 11.
  • the three heat exchangers 3, 5, 7 are arranged in separate branches of the refrigeration circuit 1, which are individually locked by means of controllable shut-off valves 13a, 13b, 13c can be released.
  • In the refrigeration cycle 1 circulates a refrigerant fluid, which serves to absorb geothermal heat in the geothermal probe 9, to transport to the heat exchangers 3, 5, 7 and deliver it to a circulating in the respective heat cycle 100, 200, 300 thermal fluid.
  • the refrigerant fluid undergoes two phase transitions, namely, once a phase transition from liquid to gaseous in the geothermal probe and once a back conversion from the gaseous to the liquid state, which takes place in the heat exchangers.
  • the geothermal probe 9 is sunk in a well, which only needs to have a small depth in the range between 100 m and 1000 m. At these depths, the geothermal energy is already high enough to be able to operate the device according to the invention meaningfully.
  • the geothermal probe 9 comprises an annular space 14 which serves to guide the liquid refrigerant fluid 15 to an evaporation space 17.
  • the annular space 14 is essentially formed by the intermediate space between an outer tube 12 and a riser 16 of the geothermal probe 9.
  • the liquid refrigerant fluid 15 flows mainly on the inner wall of the Outer tube 12 to the evaporation chamber 17.
  • its pressure is adjusted with the entry into the evaporation chamber 17 according to its thermodynamic vapor pressure curve with respect to the temperature prevailing in the evaporation chamber 17.
  • a throttle valve 18 is used at the transition between the annular space 14 and the evaporation chamber 17 for adjusting the pressure.
  • the throttle valve 18 reduces the hydrostatic pressure of the liquid refrigerant fluid 15 in the annulus to evaporation level, so that it evaporates in the evaporation chamber 17 while absorbing heat from the surrounding soil 20.
  • the now gaseous refrigerant fluid 19 rises through the central riser 16 upwards.
  • the riser 16 has a sufficient flow cross-section and is thermally insulated from the annular space 14.
  • the ascended gaseous heat fluid 19 is compressed in the compressor 11.
  • By compressing the condensation temperature of the gaseous heat fluid 19 is raised so far that it condenses in the heat exchangers 3, 5, 7 and transmits the resulting heat of condensation to the circulating in the corresponding heat cycle thermal fluid.
  • liquid refrigerant fluid 15 is then returned to the annular space 14, where it flows due to gravity on the inner wall of the outer tube 12 to the evaporation chamber 17.
  • Suitable refrigeration fluids for circulating in the refrigeration cycle 1 are, for example, carbon dioxide, propane, butane, ammonia, etc.
  • geothermal probe is only an example of a suitable geothermal probe.
  • Other geothermal probes can also be used in the refrigeration cycle 1, as long as they can build a heat pump to be operated condensation refrigeration system.
  • the heat cycle 100 which is coupled via the heat exchanger 3 to the refrigeration cycle 1, represents a conventional heating circuit, for example, for heating a building or a machine and will not be further explained at this point.
  • the heat cycle 200 which is coupled via the heat exchanger 5 to the refrigeration cycle 1, serves to obtain mechanical energy from the geothermal energy stored in the gaseous refrigerant fluid 15.
  • the heat cycle 200 comprises a pressure vessel 201 as a pressure build-up space in which the heat exchanger 5 is arranged, a turbine 22, a two-stage compressor 204a, 204b and a reservoir 205.
  • the turbine 22 is fluidly behind the pressure vessel 201 but before the compressor stages 204a, 204b arranged.
  • a fluid line 207 is provided with a valve 209 disposed therein.
  • valves 211, 213 and 215 By means of further valves 211, 213 and 215, the flow of the thermal fluid between the pressure vessel 201 and the turbine 22, between the compressor 204a, 204b and the reservoir 205 and between the turbine 22 and the compressor 204a, 204b can be prevented.
  • the thermal fluid in the pressure vessel 201 is selected so that it evaporates when the heat of condensation of the refrigerant fluid is absorbed, thereby experiencing a large pressure increase in the pressure vessel 201.
  • carbon dioxide is used as heat fluid, but in principle other fluids are also suitable, as long as they allow sufficient pressure increase in the relevant temperature range.
  • ammonia, ethane and propane may be mentioned as further possible thermal fluids.
  • the closed during the heating valve 211 between the pressure vessel 201 and the turbine 22 is opened and the heat fluid supplied to the turbine 22, where it performs work under relaxation and cooling.
  • the mechanical energy thus generated is then used to drive a generator 24 which generates electrical energy.
  • the valve 209 ensures that the high-pressure thermal fluid can not get into the reservoir 205 via the fluid line 207.
  • the cooled and discharged from the turbine 203 Relaxed thermal fluid is finally liquefied in the compressor stages 204a and 204b by compression and then collected in the reservoir 205.
  • the released during compression heat is dissipated via a secondary heat cycle 206 and used for heating purposes.
  • valve 213 When flow into the reservoir 205 ceases, the valve 213 is closed to prevent backflow of the compressed thermal fluid to the compressor stages 204a, 204b. At this stage, the pressure in the reservoir 205 is higher than in the now empty pressure chamber 201. Now, the valve 209 is opened, so that a pressure equalization between the pressure vessel 201 and the reservoir 205 takes place. In this way, liquid heat fluid from the reservoir 205 is fed back into the pressure vessel 201. After a pressure equalization between the pressure vessel 201 and the reservoir 205 has taken place, the valve 209 is closed again and the valve 13 b is opened.
  • the recirculated heat fluid begins to heat again, eventually leading to re-evaporation of the heat fluid and repressurization in the pressure vessel 201, so that after reopening the valve 211, the turbine 22 can be re-powered by the thermal fluid.
  • a cyclic operation of the heat cycle 200 takes place, which has two phases.
  • work is performed by the thermal fluid flowing through the turbine 22, which is used for energy production. Part of the work is also used to drive the compressor stages 204a, 204b.
  • the second phase in which no work is done in the turbine 22, the return of heat fluid from the reservoir 205 takes place in the pressure vessel 20.
  • the control of the phases by means of the controllable valves 13b, 209, 211 and 213th
  • the third heat cycle 300 has substantially the same structure as the second heat cycle 200. Elements in the third heat loop that correspond to elements of the second heat loop 200 are labeled with reference numbers increased by 100. Only the secondary heat cycle 306 for dissipating the heat of condensation in the compressor stages 304a, 304b is used differently than in the first heat cycle 200. Instead of being used for heating purposes, the heat of condensation is used in addition to the heat of condensation of the refrigerant fluid for heating the heat fluid in the pressure vessel 301. It should be noted that the different configuration of the secondary heat circuits 206, 306 in the present embodiment mainly serves to illustrate the various possibilities of utilizing the heat of condensation occurring in the compressor stages. In reality, however, it will generally be the case that both secondary heat circuits 206, 306 are designed identically.
  • the heat cycle 300 is controlled to undergo the phase of regeneration while the heat fluid in the heat cycle 200 in the turbine 22 performs work. In this way, the power generation by the generator 24 can be made uniform.
  • the soil has a stable temperature of approx. 18 ° C all year round.
  • propane (C 3 H 8 ) or ammonia (NH 3 ) or a mixture thereof, possibly also a mixture of ammonia, propane and carbon dioxide is used as the cooling fluid
  • the refrigerant fluid in its gaseous phase can reach a temperature of 18 ° C. exhibit.
  • CO2 can be used as thermal fluid in this case. This has at 18 ° C a vapor pressure of about 6 MPa, ie of 60 atmospheres (see Figure 3).
  • carbon dioxide only has a vapor pressure of about 3.5 MPa, ie about 35 atmospheres.
  • the pressure difference of 25 atmospheres is sufficient to run a turbine.
  • a temperature difference of 18 ° C in the thermal fluid is easy to achieve with the device according to the invention.
  • the vapor pressure at 18 C C is still about 4 MPa (about 40 atmospheres) and the vapor pressure at 0 ° C. is about 2.5 MPa, ie about 25 atmospheres.
  • the pressure difference with ethane is only 15 atmospheres, but this pressure difference is still sufficient to operate the turbine.
  • the temperature of the condensed thermal fluid will usually actually be below 0 ° C.
  • temperatures of up to 55 0 C in the compressed gaseous refrigerant fluid can be reached in the previous numerical example. With double compression even temperatures of over 100 0 C can be achieved. It is worth mentioning that in the soil 20 around the evaporation space 17 of the geothermal probe 9 around forms an ice jacket. This can be used to build a cooling circuit with which, for example, an air conditioner can be operated. In this way, the actually occurring as waste product cooling capacity of the device according to the invention can be supplied to a meaningful use.
  • the described method for generating mechanical energy from heat can also be used for driving mobile systems, for example vehicles.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

L'invention concerne un procédé pour produire de l'énergie mécanique à partir de chaleur, ce procédé consistant à extraire de la chaleur d'une source de chaleur, à transmettre la chaleur extraite à un fluide thermique circulant dans un circuit thermique fermé (200, 300) et à faire évaporer le fluide thermique au moyen de la chaleur transmise avec augmentation de la pression dans le fluide thermique évaporé. Le fluide thermique sous haute pression traverse une turbomachine (22) et fournit de l'énergie par refroidissement et détente. Le fluide thermique détendu et refroidi après avoir traversé la turbomachine est de nouveau condensé et la pression du fluide thermique condensé est à nouveau augmenté au moyen de la chaleur de la source de chaleur. Le fluide thermique est sélectionné de manière que l'exploitation d'une extension de la température, avec une maximale thermique ne dépassant pas 13 °C, permet de réaliser une différence de pression de vapeur d'au moins 0,5 MPa.
EP06806086A 2005-10-07 2006-10-02 Procede et dispositif pour produire de l'energie mecanique ou electrique a partir de chaleur Withdrawn EP1941160A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005049215A DE102005049215A1 (de) 2005-10-07 2005-10-07 Verfahren und Vorrichtung zur Gewinnung von mechanischer oder elektrischer Energie aus Wärme
PCT/EP2006/009680 WO2007042215A1 (fr) 2005-10-07 2006-10-02 Procede et dispositif pour produire de l'energie mecanique ou electrique a partir de chaleur

Publications (1)

Publication Number Publication Date
EP1941160A1 true EP1941160A1 (fr) 2008-07-09

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EP06806086A Withdrawn EP1941160A1 (fr) 2005-10-07 2006-10-02 Procede et dispositif pour produire de l'energie mecanique ou electrique a partir de chaleur

Country Status (3)

Country Link
EP (1) EP1941160A1 (fr)
DE (1) DE102005049215A1 (fr)
WO (1) WO2007042215A1 (fr)

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