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EP1008821A1 - Dispositif pour le transfert de chaleur par compression et expansion de gaz - Google Patents

Dispositif pour le transfert de chaleur par compression et expansion de gaz Download PDF

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Publication number
EP1008821A1
EP1008821A1 EP98870269A EP98870269A EP1008821A1 EP 1008821 A1 EP1008821 A1 EP 1008821A1 EP 98870269 A EP98870269 A EP 98870269A EP 98870269 A EP98870269 A EP 98870269A EP 1008821 A1 EP1008821 A1 EP 1008821A1
Authority
EP
European Patent Office
Prior art keywords
chamber
gas
cooled
piston
movable element
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Withdrawn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
EP98870269A
Other languages
German (de)
English (en)
Inventor
Paul Alfons Dominique De Vadder
Guido Prosper Richienne De Bock
Hendrik Marie Marcel Eduard Allaert
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.)
Sc Ndr Management Srl
Original Assignee
Sc Ndr Management Srl
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 Sc Ndr Management Srl filed Critical Sc Ndr Management Srl
Priority to EP98870269A priority Critical patent/EP1008821A1/fr
Publication of EP1008821A1 publication Critical patent/EP1008821A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F25B23/00—Machines, plants or systems, with a single mode of operation not covered by groups F25B1/00 - F25B21/00, e.g. using selective radiation effect
    • F25B23/006—Machines, plants or systems, with a single mode of operation not covered by groups F25B1/00 - F25B21/00, e.g. using selective radiation effect boiling cooling systems
    • 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
    • F25B25/00—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
    • F25B25/005—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00 using primary and secondary systems

Definitions

  • This invention relates to a device for heat transfer from an element to be cooled to a heat exchanger.
  • caloducts and more and more performing heat exchangers have been on the market since approximately 20 years.
  • the known devices often use a cycle in which an element (such as a refrigerator or a pump or any device which needs to be cooled) is cooled by a compression-evaporation cycle or compression-expansion cycle.
  • the known devices are limited in the amount of heat (calories) they are able to transport in a given volume.
  • the present invention has as an object increase the heat transport density, i.e. the amount of heat that can be transported in a given volume and without requiring external energy supply.
  • the device in accordance with the invention comprises a first chamber in which a saturated gas is enclosed said chamber being in thermal contact with the element to be cooled, a second chamber in which a second gas is enclosed, the second chamber having a condensation surface and means for cooling the condensation surface, the two chambers being separated by a movable element, the device further comprising a means to transport condensed fluid of the second gas from the condensation surface to the element to be cooled in a third chamber, the first chamber being also in thermal contact with the third chamber and a means for returning second gas from the third to the second chamber in the gaseous phase.
  • the saturated gas is heated by the element to be cooled. This will greatly increase the pressure in the first chamber, causing the movable element to move and compress the second gas in the second chamber. This will cause the second gas will liquefy at the condensation surface, and because of the increased pressure in the second chamber the liquid will be transported by the one-way transport means to the element to be cooled.
  • the liquid will evaporate in the third chamber, cooling the element to be cooled, but also the first chamber. This evaporation increases the pressure in the third chamber, causing the second gas to be forced into the second chamber, at the same time decreasing (because the first gas is cooled) the pressure in the first chamber.
  • the movable element will move back, the saturated gas wilt be heated again, so that the pressure in the first chamber is increased which will start the cycle again.
  • the result is that a evaporation-cooling cycle is started which is in fact driven by the heat supply.
  • a very efficient cooling results.
  • the movable element separates the two chambers and thus separates the two gases preventing mixing of the two gases. Such mixing may have a negative effect on the cooling efficiency of the device.
  • the device comprises a piston having a high magnetic coercivity and a magnetisable liquid is used for sealing. This preferred embodiment enables in a simple, yet efficient and reliable manner to provide a movable element which separates the two gases, while also moving with little friction.
  • the present innovation permits an increased amount of heat to be transported in a very small volume and the possibility of precise adjustment and work, regulated by the feedback of liquid from the condensation side.
  • the means to transport and/or the means for returning comprise one-way systems for instance one-way valves.
  • a part of the first chamber being close to the element to be cooled, and removed from the second chamber, is thermally isolated from the third chamber.
  • first chamber will be described as 'expansion chamber', the second chamber as 'condensation chamber' and the third chamber as 'evaporation chamber'.
  • the first gas will be described as 'saturated gas', the second gas as 'refrigerant gas'.
  • Figure 1 shows schematically a device according to the invention.
  • figure 1 :
  • the expansion chamber 4 comprises a saturated gas, able to exert a big pressure under the action of an increase of temperature. This gas will be rapidly cooled in its expansion phase by thermal contact with the third chamber. This heat exchange forces the gas in the first chamber to re-contract to its initial position.
  • a movable element preferably a special piston as shown in figure 1, transmits the expansion force towards the second condensation chamber.
  • the device according to the invention therefor forms a kind of caloduct (heat conduction duct) in which two gases are used, one expanded by temperature in the expansion chamber 3, the other compressed by the first in the condensation chamber 18. Additionally, the two gases interact in compression - expansion, via a movable element P, acting as a force transmitter that forms a part this device.
  • the movable element separates the two chambers and thus separates the two gases preventing mixing of the two gases. Such mixing may have a negative effect on the cooling efficiency of the device.
  • the element P is preferably a piston having two elements, preferably double inverse cones 5 and 6 that are bound to each other, preferably by means of magnetic forces.
  • the cones preferably have a very high magnetic coercivity.
  • the elements 5 and 6 are preferably made of a material having a high magnetic coercitivity and contains a magnetisable liquid, around its middle, facilitating in this way the translation of the piston forming at the same time hermetic seals. This preferred embodiment enables in a simple, yet efficient and reliable manner to provide a movable element which separates the two gases, while also moving with little friction.
  • the condensation chamber 18 interacts with the piston 10 for transmission of forces in the following way:
  • the part 2 made of thermally isolating material ensures that the gas in chamber 4 is hardly cooled, but instead, due to element 1 heated. This leads to a rapid expansion of the saturated gas in chamber 4, pushing movable element P away from element 1. This causes cooling of the saturated gas in chamber 4, condensation of gas in chamber 18, which condensed liquid then leaves chamber 18 via valve 12 as explained above, after which the cycle recommences.
  • the device therefor is a self-contained device in which a refrigerant gas is cycled not needing any outside energy supply, because the energy for the cycle is in fact supplied by heat from element 1. This enables very compact designs enabling higher refrigerating power per volume, no electrical leads to the outside world and less break-down. Cooling of the condensor 14 can be done by circulation of cooling liquid.
  • a heat transfer device comprises two sub-systems, separated by a movable element P, for instance a piston.
  • the first sub-system is near the element to be cooled and in thermal contact with said element and comprises a first chamber comprising a saturated gas
  • the second sub-system comprises a second chamber in thermal contact with a cooled surface, the first and second chamber being separated by the movable element.
  • a second gas is present which condenses on the cooled surface when the second gas is pressurized by the movable element. Conduits lead the condensed liquid from the second chamber towards the element to be cooled.
  • the liquid evaporates in a third chamber in thermal contact with the element to be cooled and the first chamber.
  • the device comprises a piston having a high magnetic coercivity (thus generating a strong magnetic field) and a magnetisable liquid is used for sealing.
  • a piston having a high magnetic coercivity thus generating a strong magnetic field
  • a magnetisable liquid is used for sealing.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
EP98870269A 1998-12-10 1998-12-10 Dispositif pour le transfert de chaleur par compression et expansion de gaz Withdrawn EP1008821A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP98870269A EP1008821A1 (fr) 1998-12-10 1998-12-10 Dispositif pour le transfert de chaleur par compression et expansion de gaz

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98870269A EP1008821A1 (fr) 1998-12-10 1998-12-10 Dispositif pour le transfert de chaleur par compression et expansion de gaz

Publications (1)

Publication Number Publication Date
EP1008821A1 true EP1008821A1 (fr) 2000-06-14

Family

ID=8237134

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98870269A Withdrawn EP1008821A1 (fr) 1998-12-10 1998-12-10 Dispositif pour le transfert de chaleur par compression et expansion de gaz

Country Status (1)

Country Link
EP (1) EP1008821A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1033860A (en) * 1963-12-13 1966-06-22 Philips Nv Improvements in or relating to devices including a rolling diaphragm seal between two co-axially arranged relatively reciprocable elements
US3491554A (en) * 1968-12-11 1970-01-27 Gas Dev Corp Heat-actuated regenerative compressor system
BE838370R (fr) * 1976-02-09 1976-05-28 Pompe a chaleur
BE843850A (fr) * 1976-07-06 1976-11-03 Pompe a chaleur
US4120172A (en) * 1977-05-05 1978-10-17 The United States Of America As Represented By The United States Department Of Energy Heat transport system
US4450690A (en) * 1983-01-10 1984-05-29 Clark Jr Robert W Thermally powered, gravitationally assisted heat transfer systems
US5339645A (en) * 1992-06-29 1994-08-23 Israel Siegel Solar hot water cooling system
US5720177A (en) * 1993-11-22 1998-02-24 Danny Derrick Multichambered pump for a vapor compression refrigeration system
US5816313A (en) * 1994-02-25 1998-10-06 Lockheed Martin Corporation Pump, and earth-testable spacecraft capillary heat transport loop using augmentation pump and check valves

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1033860A (en) * 1963-12-13 1966-06-22 Philips Nv Improvements in or relating to devices including a rolling diaphragm seal between two co-axially arranged relatively reciprocable elements
US3491554A (en) * 1968-12-11 1970-01-27 Gas Dev Corp Heat-actuated regenerative compressor system
BE838370R (fr) * 1976-02-09 1976-05-28 Pompe a chaleur
BE843850A (fr) * 1976-07-06 1976-11-03 Pompe a chaleur
US4120172A (en) * 1977-05-05 1978-10-17 The United States Of America As Represented By The United States Department Of Energy Heat transport system
US4450690A (en) * 1983-01-10 1984-05-29 Clark Jr Robert W Thermally powered, gravitationally assisted heat transfer systems
US5339645A (en) * 1992-06-29 1994-08-23 Israel Siegel Solar hot water cooling system
US5720177A (en) * 1993-11-22 1998-02-24 Danny Derrick Multichambered pump for a vapor compression refrigeration system
US5816313A (en) * 1994-02-25 1998-10-06 Lockheed Martin Corporation Pump, and earth-testable spacecraft capillary heat transport loop using augmentation pump and check valves

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