FR2693539A1 - Heat pump installation - uses evaporator buried in ground with vertical loop and horizontal loop either in series or in parallel with valves selecting loop. - Google Patents

Heat pump installation - uses evaporator buried in ground with vertical loop and horizontal loop either in series or in parallel with valves selecting loop. Download PDF

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Publication number
FR2693539A1
FR2693539A1 FR9208761A FR9208761A FR2693539A1 FR 2693539 A1 FR2693539 A1 FR 2693539A1 FR 9208761 A FR9208761 A FR 9208761A FR 9208761 A FR9208761 A FR 9208761A FR 2693539 A1 FR2693539 A1 FR 2693539A1
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France
Prior art keywords
vertical
pins
loop
horizontal
installation according
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Granted
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FR9208761A
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French (fr)
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FR2693539B1 (en
Inventor
Barrault Jean-Luc
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SOFATH
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SOFATH
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Publication of FR2693539A1 publication Critical patent/FR2693539A1/en
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Publication of FR2693539B1 publication Critical patent/FR2693539B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • 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
    • F24D3/00—Hot-water central heating systems
    • F24D3/18—Hot-water central heating systems using heat pumps
    • 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
    • F24D3/00—Hot-water central heating systems
    • F24D3/12—Tube and panel arrangements for ceiling, wall, or underfloor heating
    • F24D3/14—Tube and panel arrangements for ceiling, wall, or underfloor heating incorporated in a ceiling, wall or floor
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B30/00—Heat pumps
    • F25B30/06—Heat pumps characterised by the source of low potential heat
    • 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
    • F24D3/00—Hot-water central heating systems
    • F24D3/12—Tube and panel arrangements for ceiling, wall, or underfloor heating
    • 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
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • 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
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/12—Hot water central heating systems using heat pumps
    • 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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Other Air-Conditioning Systems (AREA)

Abstract

The evaporator is buried in the ground outside a house, and has two hair pin loops, one vertical (15) and the other horizontal (14). The vertical loop is situated between the expansion valve (13) and the horizontal loop, or alternately between the horizontal loop and the compressor (11). In an alternative configuration the horizontal and vertical loops are connected in parallel, and valves allow selection of which loop is used at any time. ADVANTAGE - Combines benefits of faster response to external temperature of horizontal loop with reduced sensitivity of vertical loop.

Description

La présente invention concerne un dispositif permettant d'améliorer les performances d'un système de chauffage par capteur évaporateur enterré. Le dispositif permet également un bon fonctionnement quel que soit le climat ou l'altitude du lieu OU est réalisée l'installation. The present invention relates to a device for improving the performance of a heating system using a buried evaporator sensor. The device also allows proper operation whatever the climate or the altitude of the place OR the installation is carried out.

On connait déja les systèmes de chauffage par circuit frigorifique caractérisés en ce que 1 'évaporateur est constitué d'épingles horizontales enterrées å faible profondeur dans le sol extérieur
On connait aussi les systèmes de chauffage par circuit frigorifique caractérisés en ce que 1 'évaporateur est constitué d'épingles ou de serpentins verticaux enterrés dans des forages ou des fosses de plus grande profondeur.We already know the refrigeration circuit heating systems characterized in that the evaporator consists of horizontal pins buried at shallow depth in the exterior soil
There are also known refrigeration circuit heating systems characterized in that the evaporator consists of pins or vertical coils buried in boreholes or pits of greater depth.

Lorsque les épingles de l'évaporateur sont disposées horizontalement a faible pr-ofondeur, on peut constater que le prélèvement d'énergie est plus faible pendant les périodes les plus froides mais que le capteur profite rapidement aux hausses de température extérieure
Lorsque les épingles de l'évaporateur sont disposées verticalement et à une certaine profondeur, on peut constater que le prélèvement d'énergie ne faiblit pas pendant 1 les périodes les plus froides mais réagit moins vite au redoux extérieur et profite moins bien des apports solaires.When the evaporator pins are arranged horizontally at low depth, it can be seen that the energy consumption is lower during the coldest periods but that the sensor quickly benefits from increases in outside temperature
When the pins of the evaporator are arranged vertically and at a certain depth, it can be seen that the energy withdrawal does not weaken during 1 the coldest periods but reacts less quickly to the external warmth and benefits less from the solar gains.

Le dispositif selon l'invention permet de réaliser une i nstal 1 ati on de chauffage par capteur-6vaporateur enterré qui réunit les avantages particuliers des deux utilisations connues. The device according to the invention allows an i nstal 1 ati on heating by buried sensor-6vaporator which combines the particular advantages of the two known uses.

C'est un but principal de l'invention de fournir un système de chauffage par capteur-évaporateur permettant un prélèvement d'énergie plus important pendant les périodes les plus froides de l'hiver. It is a main object of the invention to provide a heating system by sensor-evaporator allowing a higher energy consumption during the coldest periods of winter.

C'est un but principal de l'invention d'améliorer en conséquence les temperatures d'évaporation du fluide frigorigbne en circulation dans les tubes du capteur pour augmenter l'économie réalisée par le client. It is a main object of the invention to consequently improve the evaporation temperatures of the refrigerant circulating in the sensor tubes to increase the savings made by the customer.

C'est aussi un but de l'invention de fournir une installation assurant le retour de l'huile en circulation. It is also an object of the invention to provide an installation ensuring the return of the circulating oil.

Une installation de chauffage par circuit frigorifique selon l'invention est caracte.risée en ce que l'evaporateur est constitué d'épingles horizontales associées a des épingles verticales de telle manière que le prélèvement d'énergie soit maximum tout au long de l'hiver.  A cooling circuit heating installation according to the invention is characterized in that the evaporator consists of horizontal pins associated with vertical pins so that the energy consumption is maximum throughout the winter .

Les dossiers annexés illustrent l'invention
- la figure 1 représente un schéma en série d'une installation selon l'invention.The attached files illustrate the invention
- Figure 1 shows a series diagram of an installation according to the invention.

- la figure 2 représente une variante de la figure 1. - Figure 2 shows a variant of Figure 1.

- la figure .3 représente un schéma en parallèle d'une installation selon l'invention. - Figure .3 shows a parallel diagram of an installation according to the invention.

- la figure 4 représente une variante de la figure .3. - Figure 4 shows a variant of Figure .3.

- la figure 5 représente un schéma à plusieurs épingles verticales en série. - Figure 5 shows a diagram with several vertical pins in series.

- la figure 6 représente un tube dans un forage incliné. - Figure 6 shows a tube in an inclined borehole.

- la figure 7 représente un détail de la figure 6. - Figure 7 shows a detail of Figure 6.

- la figure 8 représente l'association des épingles verticales, horizontales et din module enterré. - Figure 8 shows the association of vertical, horizontal pins and buried module din.

Le dispositif selon l'invention figure t comprend un compresseur de fluide frigorigbne il refoulant par une tuyauterie le gaz comprimé dans le condenseur 12 qui échange sa chaleur avec le béton d'un sol chauffant ou avec l'eau d'un circuit de chauffage ou de production d'eau chaude sanitaire. The device according to the invention in FIG. T comprises a refrigerant compressor which pumps the compressed gas into the condenser 12 through a pipe, which exchanges its heat with the concrete of a heating floor or with the water from a heating circuit or for producing domestic hot water.

Lorsque le fluide frigorigène est condensé dans le condenseur 12, il arrive au détendeur 1.3 puis s'évapore dans une ou plusieurs épingles 15 disposées verticalement. Le fluide frigorigbne non évaporé arrive ensuite dans les épingles horizontales 14 ou il finit de s'évaporer avant de retourner au compresseur 11.When the refrigerant is condensed in the condenser 12, it arrives at the pressure reducer 1.3 and then evaporates in one or more pins 15 arranged vertically. The non-evaporated refrigerant then arrives in the horizontal pins 14 or it finishes evaporating before returning to the compressor 11.

Le dispositif selon l'invention figure 2 comprend un compresseur de fluide frigorigène 21 refoulant dans un condenseur 22 puis un détendeur 23. Le fluide frigorigène s'évapore ensuite dans les épingles horizontales 24, la ou les épingles verticales 25 permettent de terminer l'évaporation ou de surchauffer le fluide frigorigbne à l'aspiration. The device according to the invention in FIG. 2 comprises a refrigerant compressor 21 discharging into a condenser 22 and then a pressure reducer 23. The refrigerant then evaporates in the horizontal pins 24, the vertical pin or pins 25 make it possible to complete the evaporation or overheat the refrigerant on suction.

Le dispositif selon l'invention figure 3 comprend un compresseur de fluide feigorigbne 31 refoulant le gaz comprimé dans un condenseur 32 qui échange sa chaleur avec le béton d'un sol chauffant ou avec l'eau d'un circuit de chauffage ou de production d'eau chaude sanitaire. Lorsque le fluide frigor-lgbne est condensé dans le condenseur 32, il arrive au détendeur 33 puis s'évapore dans une ou plusieurs épingles verticales .35 disposées en parallèle avec les épingles horizontales 34. Des vannes électriques ou manuelles 36 et 37 permettent d'envoyer le fluide frigorigene indifféremment dans les épingles verticales 35 ou dans les épingles horizontales 34 ou dans les deux simultanément.Les vannes 36 et 7 sont commandes par un dispositif qui peut-etre manuel ou automatique en fonction de la température extérieure, de la température d sol près du capteur ou de la temperature du fluide f rigorigène.  The device according to the invention in FIG. 3 comprises a feigorigbne fluid compressor 31 discharging the compressed gas into a condenser 32 which exchanges its heat with the concrete of a heating floor or with the water from a heating or production circuit d 'hot water. When the refrigerant-lgbne is condensed in the condenser 32, it arrives at the pressure reducer 33 then evaporates in one or more vertical pins .35 arranged in parallel with the horizontal pins 34. Electric or manual valves 36 and 37 allow send the refrigerant indifferently in the vertical pins 35 or in the horizontal pins 34 or in both simultaneously. The valves 36 and 7 are controlled by a device which can be manual or automatic depending on the outside temperature, the temperature d ground near the sensor or the temperature of the f rigorigenic fluid.

Le dispositif selon l'invention fige 4 comprend un compresseur de fluide frIgorIgbne 41 refoulant le gaz comprimé dans un condenseur 42 puis distribuant le fluide frigorigéne dans au moins deux détendeurs 4:3 et 44. Le détendeur 43 envoie le fluide trigorigène dans l'épingle verticale 46. Le détendeur 44 envoi? le fluide frigor-igene dans l'épingle horizontale 45. The device according to the invention freezes 4 comprises a compressor for refrigerant fluid 41 discharging the compressed gas into a condenser 42 then distributing the refrigerant fluid in at least two regulators 4: 3 and 44. The regulator 43 sends the trigorigenic fluid in the pin vertical 46. The regulator 44 sending? the refrigerant-igene in the horizontal pin 45.

L'ouverture de chaque détendeur, commandée par des dispositifs mécaniques, thermostatiques ou électroniques permet à chaque type d'épingle, verticale 46 ou horizontale 45, d'trie utilisée au maximum de ses capacités énergétiques.The opening of each regulator, controlled by mechanical, thermostatic or electronic devices allows each type of pin, vertical 46 or horizontal 45, to be used to the maximum of its energy capacities.

Le dispositif selon l'invention figure 5 comprend un compresseur de fluide frigorigene 51 refoulant le gaz comprimé dans un condenseur 52 restituant la chaleur dans le milieu a chauffer. Lorsque le fluide frigorigene est condensé dans le condenseur 52, il arrive au détendeur 53 et s'évapore dans une succession d'épingles horizontales 55 et verticales 54 disposées en série. The device according to the invention in FIG. 5 comprises a refrigerant compressor 51 discharging the compressed gas into a condenser 52 restoring the heat in the medium to be heated. When the refrigerant is condensed in the condenser 52, it arrives at the expansion valve 53 and evaporates in a succession of horizontal pins 55 and vertical pins 54 arranged in series.

Le dispositif selon l'invention figure 6 comprend une épingle verticale inclinée glissée dans un forage 61 tubé ou non tubé et comportant une entrée de fluide +rigorigène 62 descendant au fond du forage, soit directement, soit en serpentin. Le tube remonte ensuite en serpentin vers la sortie 64. L'inclinaison du forage 61 permet, comme défini sur la figure 7, de créer sur le serpentin 73, une suite de points bas 72 permettant une remontée d'huile trés facile. The device according to the invention in FIG. 6 comprises an inclined vertical pin slipped into a cased or uncased borehole 61 and comprising a fluid + rigorigenic inlet 62 descending to the bottom of the borehole, either directly or in a serpentine. The tube then rises in a serpentine direction towards the exit 64. The inclination of the borehole 61 makes it possible, as defined in FIG. 7, to create on the serpentine 73, a series of low points 72 allowing a very easy ascent of oil.

Le dispositif suivant l'invention figure 8 comprend une enveloppe fermée 81 comportant le compresseur et tous les éléments du circuit frigorifique selon la demande de brevet n 9014986. Ce circuit frigorifique comprend un condenseur 82 placé dans le milieu a chauffer. The device according to the invention in FIG. 8 comprises a closed casing 81 comprising the compressor and all the elements of the refrigeration circuit according to patent application No. 9014986. This refrigeration circuit comprises a condenser 82 placed in the medium to be heated.

L'évaporateur est constitué d'épingles verticales 84 et horizontales 83 comme décrit précédemment et comme représenté aux flgures 1, 2, 3, 4 et 5. La particularité de la fulgure 8 est la disposition de la ou des épingles verticales dont les extrémités sont placées dans la bote 85 qui remit l'enveloppe termée 81. The evaporator is made up of vertical 84 and horizontal 83 pins as described above and as shown in FIGS. 1, 2, 3, 4 and 5. The particularity of the flash 8 is the arrangement of the vertical pin or pins, the ends of which are placed in the box 85 which puts back the completed envelope 81.

Le dispositif selon l'invention est particulièrement destiné au chauffage des habitations individuelles et collectives, aux locaux tertiaires industriels et agricoles et à la production d'eau chaude sanitaire.  The device according to the invention is particularly intended for heating individual and collective dwellings, tertiary industrial and agricultural premises and for producing domestic hot water.

Claims (8)

REvENDICATIONS 1) Installation de chauffage par circuit +rigori+ique a évaporateur enterré, caractérisée en ce que 1 'évaporateur est constitué d'épingles verticales 15 et d'épingles horizontales 14. 1) Heating installation by circuit + rigori + ic with buried evaporator, characterized in that the evaporator consists of vertical pins 15 and horizontal pins 14. 2 ) Installation selon la revendication 1, caractérisée en ce que les épingles verticales 15 sont situées entre le détendeur 13 et les épingles horizontales 14. 2) Installation according to claim 1, characterized in that the vertical pins 15 are located between the regulator 13 and the horizontal pins 14. .3) Installation selon la revendication X, caractérisée en ce que les épingles verticales 25 sont situées entre les épingles horizontales 24 et le compresseur 21. .3) Installation according to claim X, characterized in that the vertical pins 25 are located between the horizontal pins 24 and the compressor 21. 4 > Installation selon la revendication 1, caractérisée en ce que les épingles verticales .35 sont raccordées en parallèle avec les épingles horizontales :34, des vannes 36 et 37 facultatives permettant d'envoyer le fluide frigorigene dans les épingles verticales 35 ou dans les épingles horizontales .34 ou dans les de simultanément. 4> Installation according to claim 1, characterized in that the vertical pins .35 are connected in parallel with the horizontal pins: 34, optional valves 36 and 37 for sending the refrigerant in the vertical pins 35 or in the pins horizontal .34 or simultaneously. 5) Installation selon la revendication 1, caractérisée en ce que les épingles verticales 46 sont alimentés par un détendeur 43 et que les épingles horizontales 45 sont alimentées par un détendeur 44. 5) Installation according to claim 1, characterized in that the vertical pins 46 are supplied by a regulator 43 and that the horizontal pins 45 are supplied by a regulator 44. 6) Installation selon la revendication t, caractérisée en ce que une épingle verticale 54 est suivie par une épingle horizontale 55, et ceci pour l'ensemble de l'évaporateur composé de plusieurs épingles verticales et de plusieurs épingles horizontales. 6) Installation according to claim t, characterized in that a vertical pin 54 is followed by a horizontal pin 55, and this for the whole of the evaporator composed of several vertical pins and several horizontal pins. 7) Installation selon la revendication 1, caractérisée en ce que les épingles d'allure verticales 63 sont glissées dans un forage oblique 61, l'enroulage en serpentin de l'épingle verticale créant une multitude de points bas 72. 7) Installation according to claim 1, characterized in that the vertical-looking pins 63 are slid into an oblique bore 61, the coil winding of the vertical pin creating a multitude of low points 72. 8) Installation selon la revendication l, caractérisée en ce que les extrémités des épingles verticales 84 débouchent dans le regard 85 recevant l'enveloppe semée 81 contenant le circuit +rigori+ique.  8) Installation according to claim l, characterized in that the ends of the vertical pins 84 open into the manhole 85 receiving the sown envelope 81 containing the circuit + rigor + ic.
FR9208761A 1992-07-09 1992-07-09 Improvement of the performance of the underground evaporator of a heat pump. Expired - Fee Related FR2693539B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9208761A FR2693539B1 (en) 1992-07-09 1992-07-09 Improvement of the performance of the underground evaporator of a heat pump.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9208761A FR2693539B1 (en) 1992-07-09 1992-07-09 Improvement of the performance of the underground evaporator of a heat pump.

Publications (2)

Publication Number Publication Date
FR2693539A1 true FR2693539A1 (en) 1994-01-14
FR2693539B1 FR2693539B1 (en) 1995-01-06

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FR9208761A Expired - Fee Related FR2693539B1 (en) 1992-07-09 1992-07-09 Improvement of the performance of the underground evaporator of a heat pump.

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2802623A1 (en) * 1999-12-20 2001-06-22 Didier Demercastel Cold food storage circuit in cellar or cave has closed fluid circuit with fluid tank heated geo-thermally to provide power for cooling
EP1582826A1 (en) * 2004-03-29 2005-10-05 Andreas Bangheri Heat pump and method for cyclic vapour compression

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2045909A (en) * 1979-03-30 1980-11-05 Schmidt Paul Heat pump installation
EP0047223A1 (en) * 1980-08-22 1982-03-10 Andreas Dr.-Ing. Hampe Apparatus for extracting geothermal heat
EP0189733A1 (en) * 1985-02-01 1986-08-06 Leo Gut Heat pump installation for heat extraction from the ground

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2045909A (en) * 1979-03-30 1980-11-05 Schmidt Paul Heat pump installation
EP0047223A1 (en) * 1980-08-22 1982-03-10 Andreas Dr.-Ing. Hampe Apparatus for extracting geothermal heat
EP0189733A1 (en) * 1985-02-01 1986-08-06 Leo Gut Heat pump installation for heat extraction from the ground

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2802623A1 (en) * 1999-12-20 2001-06-22 Didier Demercastel Cold food storage circuit in cellar or cave has closed fluid circuit with fluid tank heated geo-thermally to provide power for cooling
EP1582826A1 (en) * 2004-03-29 2005-10-05 Andreas Bangheri Heat pump and method for cyclic vapour compression

Also Published As

Publication number Publication date
FR2693539B1 (en) 1995-01-06

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