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FR2865268A1 - Solar hot air producing device for drying biological product e.g. fruit, has ventilator and circulating pump regulating temperature of produced hot air, and bypass rerouting preheated air directly to input of air-water exchanger - Google Patents

Solar hot air producing device for drying biological product e.g. fruit, has ventilator and circulating pump regulating temperature of produced hot air, and bypass rerouting preheated air directly to input of air-water exchanger Download PDF

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Publication number
FR2865268A1
FR2865268A1 FR0400385A FR0400385A FR2865268A1 FR 2865268 A1 FR2865268 A1 FR 2865268A1 FR 0400385 A FR0400385 A FR 0400385A FR 0400385 A FR0400385 A FR 0400385A FR 2865268 A1 FR2865268 A1 FR 2865268A1
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FR
France
Prior art keywords
air
water
solar
hot air
hot water
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
FR0400385A
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French (fr)
Inventor
Frederic Dupont
Leon Philis
Ruddy Blonbou
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.)
ANTILLES GUYANE, University of
Original Assignee
ANTILLES GUYANE, University of
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 ANTILLES GUYANE, University of filed Critical ANTILLES GUYANE, University of
Priority to FR0400385A priority Critical patent/FR2865268A1/en
Publication of FR2865268A1 publication Critical patent/FR2865268A1/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
    • F26B3/283—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun in combination with convection
    • F26B3/286—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun in combination with convection by solar radiation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D11/00—Central heating systems using heat accumulated in storage masses
    • F24D11/006—Central heating systems using heat accumulated in storage masses air heating system
    • F24D11/007—Central heating systems using heat accumulated in storage masses air heating system combined with solar 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/90—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in food processing or handling, e.g. food conservation
    • Y02A40/924—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in food processing or handling, e.g. food conservation using renewable energies
    • Y02A40/926—Cooking stoves or furnaces using solar heat
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/20—Solar thermal
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
    • Y02B40/18—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers using renewables, e.g. solar cooking stoves, furnaces or solar heating

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Toxicology (AREA)
  • Microbiology (AREA)
  • Health & Medical Sciences (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

The device has a solar plate collector (4) producing hot air through an air-water exchanger at night time. A ventilator (6) and a circulating pump (2) regulate the temperature of the produced hot air. An air-air heat exchanger (5) is disposed at an output of a drying chamber (7) that preheats the air entering the collector during day time. A bypass (9) reroutes the preheated air directly to an input of an air-water exchanger (1).

Description

La présente invention concerne un dispositif de production d'air chaud àThe present invention relates to a device for producing hot air to

température asservie, en fonctionnement jour et nuit, à partir de l'énergie solaire comme seule source d'énergie.  temperature controlled, operating day and night, from solar energy as the sole source of energy.

Les systèmes antérieurs de production d'air chaud solaire ne fonctionnent que pen- dant la période d'ensoleillement, avec des capteurs à air. De plus, ils ne donnent pas la possibilité d'imposer une température seuil pour l'air chaud, ce qui est nécessaire pour le séchage de produits biologiques.  Previous solar hot air systems only operate during the period of sunshine with air sensors. In addition, they do not give the possibility of imposing a threshold temperature for hot air, which is necessary for the drying of biological products.

Le dispositif selon l'invention permet de remédier à ces inconvénients. En effet, de l'eau chaude solaire est produite et stockée le jour puis est utilisée la nuit pour obtenir de l'air chaud par l'intermédiaire d'un échangeur eau-air. Le jour, l'air chaud est produit avec des capteurs solaires. Des pompes de circulation d'eau et un ventilateur, à débit variable, alimentés à partir de capteurs photovoltaïques permettent de contrôler la température seuil à ne pas dépasser dans l'air. L'utilisation d'un récupérateur de chaleur dans le circuit d'air, en aval de l'enceinte de séchage permet de minimiser la surface de captation du rayonnement solaire et d'optimiser la production d'air chaud la nuit. Un circuit bipasse permet de diriger l'air préchauffé vers les capteurs plans le jour ou directement vers l'échangeur eau-air la nuit.  The device according to the invention overcomes these disadvantages. Indeed, solar hot water is produced and stored during the day and is used at night to obtain hot air through a water-air heat exchanger. During the day, hot air is produced with solar collectors. Water circulation pumps and a fan, variable flow, powered from photovoltaic sensors to control the threshold temperature not to exceed in the air. The use of a heat recovery unit in the air circuit, downstream of the drying chamber, makes it possible to minimize the surface area for capturing solar radiation and to optimize the production of hot air at night. A bypass circuit directs the preheated air to the flat sensors during the day or directly to the water-air heat exchanger at night.

Selon trois modes particuliers de réalisation le système de production d'eau chaude peut se présenter sous la forme: - d'un capteur auto-stockeur à peinture sélective.  According to three particular embodiments, the system for producing hot water may be in the form of: a self-storage sensor with selective painting.

- d'une association de capteurs plans à peinture sélective ou non sélective reliés à un réservoir de stockage calorifugé. L'eau chaude est stockée à la pression atmosphérique. La circulation de l'eau entre le réservoir et les capteurs est assurée par thermosiphon.  - A combination of flat selective or non-selective paint sensors connected to an insulated storage tank. Hot water is stored at atmospheric pressure. The circulation of water between the tank and the sensors is provided by thermosiphon.

- d'une association de capteurs plans à peinture sélective ou non sélective reliés à un réservoir de stockage calorifugé. L'eau chaude est stockée à la pression atmosphérique. Une pompe avec une régulation différentielle assure la circulation de l'eau entre le réservoir et les capteurs.  - A combination of flat selective or non-selective paint sensors connected to an insulated storage tank. Hot water is stored at atmospheric pressure. A pump with differential regulation ensures the circulation of water between the tank and the sensors.

Les schémas annexés illustrent l'invention.  The attached drawings illustrate the invention.

La figure 1 représente le dispositif de l'invention.  Figure 1 shows the device of the invention.

La figure 2 représente une variante de ce dispositif.  Figure 2 shows a variant of this device.

En référence à ces dessins, pour le chauffage de l'air la nuit (ou lors de passages nuageux le jour), le dispositif selon l'invention comporte: - un échangeur eau-air (1) - une pompe de circulation de l'eau chaude à débit variable (2) - un système d'asservissement du débit d'eau chaude et du débit d'air en fonction de la température en consigne à l'entrée de la chambre de séchage (3).  With reference to these drawings, for the heating of the air at night (or during daytime cloudy periods), the device according to the invention comprises: - a water-air exchanger (1) - a circulation pump of the variable flow hot water (2) - a control system for the hot water flow rate and the air flow rate as a function of the temperature set at the entrance of the drying chamber (3).

Pour la production d'air chaud, le jour, le dispositif selon l'invention comporte: - un capteur solaire plan à air (4) - un échangeur récupérateur air-air (5) pour le préchauffage de l'air avant son entrée dans les capteurs, - un ventilateur assurant l'écoulement de l'air (6) - une chambre de séchage (7) - un ensemble de production d'électricité solaire (8) comprenant des panneaux solaires photovoltaïques, un régulateur de charge, des batteries de stockage pour l'alimentation des pompes de circulation, du ventilateur et du système de régulation.  For the production of hot air, during the day, the device according to the invention comprises: - a solar air-plane sensor (4) - an air-to-air heat exchanger (5) for preheating the air before entering the air the sensors, - a fan for the flow of air (6) - a drying chamber (7) - a solar power generation unit (8) comprising photovoltaic solar panels, a charge regulator, batteries storage for supplying the circulation pumps, the fan and the control system.

- un bipasse (9) permet de diriger l'air préchauffé suivant l'utilisation jour ou nuit vers les capteurs plans ou vers l'échangeur eau-air.  - A bypass (9) directs the preheated air according to the day or night use to the flat collectors or to the water-air heat exchanger.

Dans le mode de réalisation selon la figure 1, pour la production d'eau chaude solaire le dispositif comporte: - un capteur autostockeur (10) Dans le mode de réalisation selon la figure 2, pour la production d'eau chaude solaire le dispositif comporte: - un réservoir calorifugé (10bis) permettant le stockage de l'eau chaude à la pression atmosphérique (ce qui diminue le coût), - des capteurs plans (11) à peinture non sélective ou si besoin à peinture sélective 20 afin d'améliorer le rendement des capteurs, - une pompe de circulation (12) - un système de régulation différentielle (13) Selon une variante non illustrée la production d'eau chaude solaire peut être assurée par thermosiphon ce qui permet de supprimer les composants (12) et (13) de la figure 2.  In the embodiment according to FIG. 1, for the production of solar hot water the device comprises: - a self-cocking sensor (10) In the embodiment according to FIG. 2, for the production of solar hot water the device comprises : - an insulated tank (10a) for storing hot water at atmospheric pressure (which reduces the cost), - non-selective paint planar collectors (11) or, if necessary, selective painting to improve the efficiency of the sensors, - a circulation pump (12) - a differential control system (13) According to a variant not illustrated, the production of solar hot water can be provided by thermosiphon, which makes it possible to eliminate the components (12) and (13) of Figure 2.

Le dispositif selon l'invention est particulièrement destiné à la production d'air chaud solaire de manière continue et à une température contrôlée. Il trouve des applications dans tous les domaines de séchage ne nécessitant pas des températures très élevées. On peut citer pour exemple, le séchage de matières végétales tels les fruits.  The device according to the invention is particularly intended for the production of solar hot air continuously and at a controlled temperature. It finds applications in all areas of drying that do not require very high temperatures. For example, the drying of vegetable matter such as fruits.

Claims (1)

3 REVENDICATIONS3 claims 1. Dispositif solaire de production d'air chaud à température asservie en continue jour et nuit, caractérisé en ce qu'il comporte un échangeur eauair utilisé pour chauffer l'air la nuit et réguler la température le jour (1), une pompe de circulation à débit variable (2), un système de régulation des débits d'eau et d'air (3), un système de production d'air chaud par captation de l'énergie solaire rayonnée le jour (4), un échangeur air-air récupérateur de chaleur (5), un système de mise en circulation de l'air à débit commandé (6), une chambre de séchage (7), un ensemble photovoltaïque (8) utilisé pour alimenter en électricité les composants qui le nécessitent, un bipasse (9) afin de diriger l'air préchauffé suivant le mode d'utilisation jour ou nuit et un système de production d'eau chaude par captation du rayonnement solaire (10) ou (10bis), (11), (12) et (13).  1. Solar device for producing hot air at continuously temperature controlled day and night, characterized in that it comprises a water exchanger used to heat the air at night and regulate the temperature day (1), a pump of variable flow circulation (2), a system for regulating water and air flow rates (3), a system for producing hot air by capturing solar energy radiated during the day (4), an air exchanger -air heat recuperator (5), a controlled flow air circulation system (6), a drying chamber (7), a photovoltaic unit (8) used to supply electricity to the components that require it , a bypass (9) for directing the preheated air according to the mode of use day or night and a system for producing hot water by capturing the solar radiation (10) or (10a), (11), (12) ) and (13). 2. Dispositif selon la revendication 1 caractérisé en ce que le système de production de l'eau chaude solaire s'effectue par captation du rayonnement solaire avec un capteur autostockeur.  2. Device according to claim 1 characterized in that the system for producing solar hot water is effected by capturing solar radiation with a self-cocking sensor. 3. Dispositif selon la revendication 1 caractérisé en ce que le système de production d'eau chaude solaire le jour est composé d'un réservoir calorifugé de stockage de l'eau chaude à la pression atmosphérique (10bis) , de capteurs à peinture sélective ou non sélective (11), la circulation de l'eau se faisant soit par thermosiphon soit avec une pompe de circulation (12) couplée à une régulation différentielle (13).  3. Device according to claim 1 characterized in that the system for producing solar hot water during the day is composed of an insulated tank for storing hot water at atmospheric pressure (10a), selective paint sensors or non-selective (11), the circulation of water being either by thermosiphon or with a circulation pump (12) coupled to a differential control (13). 4. Dispositif selon l'une quelconque des revendications précédentes caractérisé en ce que l'eau chaude solaire est utilisée pour produire de l'air chaud la nuit.  4. Device according to any one of the preceding claims characterized in that the solar hot water is used to produce hot air at night. 5. Dispositif selon l'une quelconque des revendications précédentes caractérisé en ce qu'un échangeur de chaleur eau-air (1) soit placé en amont de l'enceinte de séchage et en aval des capteurs plans à air.  5. Device according to any one of the preceding claims characterized in that a water-air heat exchanger (1) is placed upstream of the drying chamber and downstream of the air plane sensors. 6. Dispositif selon l'une quelconque des revendications précédentes caractérisé en ce que la température de consigne de l'air chaud est contrôlée par un système d'asservissement (3) du débit d'air et du débit d'eau chaude dans l'échangeur air-eau (1) le jour et la nuit.  6. Device according to any one of the preceding claims, characterized in that the set temperature of the hot air is controlled by a servo system (3) of the air flow and hot water flow in the air-water heat exchanger (1) day and night. 7. Dispositif selon la revendication 5 caractérisé en ce qu'une pompe à débit com-30 mandé (2) est placée entre le réservoir de stockage d'eau chaude et l'échangeur de chaleur eau-air.  7. Device according to claim 5 characterized in that a com-mandé flow pump (2) is placed between the hot water storage tank and the water-air heat exchanger. 8. Dispositif selon la revendication 1 caractérisé en ce qu'un récupérateur de chaleur constitué d'un échangeur de chaleur air-air soit placé en aval de l'enceinte de séchage et en amont des capteurs plans à air afin de préchauffer l'air et de minimiser la dimension des capteurs plans à air.  8. Device according to claim 1 characterized in that a heat recovery unit consisting of an air-air heat exchanger is placed downstream of the drying chamber and upstream of the air-cooled sensors to preheat the air and to minimize the size of the air plane sensors.
FR0400385A 2004-01-15 2004-01-15 Solar hot air producing device for drying biological product e.g. fruit, has ventilator and circulating pump regulating temperature of produced hot air, and bypass rerouting preheated air directly to input of air-water exchanger Pending FR2865268A1 (en)

Priority Applications (1)

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FR0400385A FR2865268A1 (en) 2004-01-15 2004-01-15 Solar hot air producing device for drying biological product e.g. fruit, has ventilator and circulating pump regulating temperature of produced hot air, and bypass rerouting preheated air directly to input of air-water exchanger

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FR0400385A FR2865268A1 (en) 2004-01-15 2004-01-15 Solar hot air producing device for drying biological product e.g. fruit, has ventilator and circulating pump regulating temperature of produced hot air, and bypass rerouting preheated air directly to input of air-water exchanger

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2927693A1 (en) * 2008-02-15 2009-08-21 Egis Eau Sa Installation for drying sludge obtained from sewage treatment and liquid effluents, comprises greenhouse with a heat floor, solar heating device in greenhouse, device for geothermally heating coolant fluid, and device for returning sludge
CN102155844A (en) * 2010-12-28 2011-08-17 沈阳东嘉科技开发有限公司 Solar high-temperature air-liquid combined drying system
FR2965338A1 (en) * 2010-09-23 2012-03-30 Air Tech Franco Suisse METHOD AND DEVICE FOR DRYING MATERIAL
WO2010150006A3 (en) * 2009-06-23 2013-06-13 Smith's Environmental Products Limited Heating installation
FR2992057A1 (en) * 2012-06-13 2013-12-20 Jacquis Suzanne Dewatering e.g. muds from a dairy industry, by depositing a volume of wet material in tank, and compressing the volume of deposited wet material through openings of sector to transform the volume of wet material into elongated elements
CN111923386A (en) * 2020-10-15 2020-11-13 佛山市盟思拉伸机械有限公司 Film production line and ventilation distribution oven
CN117433273A (en) * 2023-09-06 2024-01-23 深圳技术大学 A zero-carbon photovoltaic drying system

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US4135491A (en) * 1975-12-26 1979-01-23 Tokyo Shibaura Electric Co., Ltd. Dwellings equipped with a room-heating device and hot water feeder based on solar heat
US4273102A (en) * 1979-05-29 1981-06-16 Anthony Myron L Solar energy system
US4281639A (en) * 1980-01-31 1981-08-04 Kuronen Seppo K Solar heating system
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FR2548336A1 (en) * 1983-06-28 1985-01-04 Barret Jean Louis Improved method of heating a gaseous fluid for heating and renewing the air of rooms, of the type comprising a coupling of solar energy and thermodynamic energy. Devices for implementing the method and installations comprising application thereof
JPS6080037A (en) * 1983-10-07 1985-05-07 Sekisui Chem Co Ltd Heat accumulating device and use thereof
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DE19827511A1 (en) * 1997-12-11 1999-06-24 Fraunhofer Ges Forschung Ventilation and heating energy supply system, with heat accumulator

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US4343296A (en) * 1979-10-15 1982-08-10 Karl Wojcik Solar heating system
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JPS57153159A (en) * 1981-03-16 1982-09-21 Kubota Ltd Solar house
FR2548336A1 (en) * 1983-06-28 1985-01-04 Barret Jean Louis Improved method of heating a gaseous fluid for heating and renewing the air of rooms, of the type comprising a coupling of solar energy and thermodynamic energy. Devices for implementing the method and installations comprising application thereof
JPS6080037A (en) * 1983-10-07 1985-05-07 Sekisui Chem Co Ltd Heat accumulating device and use thereof
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DE19730691A1 (en) * 1997-07-17 1999-01-21 Burkhard Dipl Ing Suchy Domestic air conditioning system
DE19827511A1 (en) * 1997-12-11 1999-06-24 Fraunhofer Ges Forschung Ventilation and heating energy supply system, with heat accumulator

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2927693A1 (en) * 2008-02-15 2009-08-21 Egis Eau Sa Installation for drying sludge obtained from sewage treatment and liquid effluents, comprises greenhouse with a heat floor, solar heating device in greenhouse, device for geothermally heating coolant fluid, and device for returning sludge
WO2010150006A3 (en) * 2009-06-23 2013-06-13 Smith's Environmental Products Limited Heating installation
FR2965338A1 (en) * 2010-09-23 2012-03-30 Air Tech Franco Suisse METHOD AND DEVICE FOR DRYING MATERIAL
CN102155844A (en) * 2010-12-28 2011-08-17 沈阳东嘉科技开发有限公司 Solar high-temperature air-liquid combined drying system
CN102155844B (en) * 2010-12-28 2012-05-30 沈阳东嘉科技开发有限公司 Solar high-temperature air-liquid combined drying system
FR2992057A1 (en) * 2012-06-13 2013-12-20 Jacquis Suzanne Dewatering e.g. muds from a dairy industry, by depositing a volume of wet material in tank, and compressing the volume of deposited wet material through openings of sector to transform the volume of wet material into elongated elements
CN111923386A (en) * 2020-10-15 2020-11-13 佛山市盟思拉伸机械有限公司 Film production line and ventilation distribution oven
CN117433273A (en) * 2023-09-06 2024-01-23 深圳技术大学 A zero-carbon photovoltaic drying system

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