EP0353410A2 - Verfahren zum Betrieb einer Wärmepumpenanlage - Google Patents

Verfahren zum Betrieb einer Wärmepumpenanlage Download PDF

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Publication number
EP0353410A2
EP0353410A2 EP89109332A EP89109332A EP0353410A2 EP 0353410 A2 EP0353410 A2 EP 0353410A2 EP 89109332 A EP89109332 A EP 89109332A EP 89109332 A EP89109332 A EP 89109332A EP 0353410 A2 EP0353410 A2 EP 0353410A2
Authority
EP
European Patent Office
Prior art keywords
heat transfer
transfer fluid
heat
water
evaporator
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Withdrawn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
EP89109332A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0353410A3 (de
Inventor
Dirk Ohrt
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.)
Rendamax BV
Original Assignee
Rendamax BV
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 Rendamax BV filed Critical Rendamax BV
Publication of EP0353410A2 publication Critical patent/EP0353410A2/de
Publication of EP0353410A3 publication Critical patent/EP0353410A3/de
Withdrawn legal-status Critical Current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
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/006—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass for preventing frost
    • 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

Definitions

  • the invention relates to a method for operating a heat pump system, in which an evaporator of a refrigerant circuit is acted upon by a heat transfer fluid which is conducted in an open circuit and which in turn is warmed up via the ambient air.
  • the evaporator In heat pumps with ambient air as a waste heat source, the evaporator is usually the most expensive component due to the large surface area required.
  • the heat transfer coefficients which differ by several orders of magnitude on the refrigerant side on the one hand and on the air side on the other hand, must be compensated for by differently sized surfaces. Since, depending on the refrigerant used, corrosion problems often have to be taken into account when selecting the material, the evaporator must also be made from very expensive materials.
  • the heat exchange between air and heat transfer fluid can be carried out, for example, in a conventional cooling tower, in which the heat transfer fluid is evenly distributed over a packing installation and trickles down on the packing, while the air is sucked through the packing installation with the aid of a fan. Since the heat transfer fluid has cooled down after passing through the evaporator of the refrigerant circuit, a corresponding warming up now takes place through contact with the sucked-in air, so that the amounts of heat absorbed by the heat transfer fluid from the ambient air are in turn available to act on the evaporator of the refrigerant circuit.
  • water has been used as the heat transfer fluid, to which additives have been added, for example glycols, which lower the freezing point of the water, so that heat pump operation is possible, especially at the temperature levels of interest here, with outside temperatures around 0 ° C.
  • additives for example glycols, which lower the freezing point of the water, so that heat pump operation is possible, especially at the temperature levels of interest here, with outside temperatures around 0 ° C.
  • the disadvantage of the previously used heat transfer fluids is that due to the direct heat exchange between the air on the one hand and the heat transfer fluid emerging from the evaporator of the refrigerant circuit with temperatures below 0 ° C on the other hand, the air falls below the dew point and thus the moisture contained in the air condenses and condenses precipitates on the surface of the packing installation acted upon by the heat transfer fluid and is absorbed by the heat transfer fluid consisting of a glycol-water mixture.
  • the heat transfer fluid is diluted by the condensed water taken up and at the same time the amount of circulating heat transfer fluid is increased, so that the exchanger device for the heat exchange between air and heat transfer fluid freezes under unfavorable climatic conditions.
  • a regulation to keep the mixture concentration constant is complex and the continuous disposal of the heat transfer fluid diluted with water is costly.
  • the invention has for its object to provide an operating method with which the disadvantages described above are avoided.
  • a water-immiscible liquid is used as the heat transfer liquid. It is particularly expedient if, in an embodiment of the invention, the water-immiscible heat transfer fluid has a density that differs significantly from water. This has the advantage that the condensing in the area of the exchanger device Humidity is entrained by the heat transfer fluid, but is not absorbed by it. The water can then be separated from the heat transfer fluid in a simple manner. The separation of water and heat transfer fluid is particularly easy if the density differences between the water and the heat transfer fluid are clearly different.
  • the water can, for example, be drained directly into the sewage system if the separating device is configured accordingly, which can also be, for example, a simple sedimentation basin. You only have to take precautions to ensure that the separation is flawless.
  • an oil is used as the heat transfer fluid.
  • the heat transfer fluid is passed through a device for separating water before the evaporator is acted upon. This avoids, on the one hand, that the condensed water absorbed during the heat exchange of the heat transfer fluid is emulsified with the heat transfer fluid in the pump required for operating the circuit and then crystallized out in the evaporator of the refrigerant circuit as a result of cooling to temperatures below 0 ° C. and causing icing in this area.
  • An evaporator 2 is arranged on a heat pump system 1 of conventional design, through which the refrigerant of the heat pump system flows on the one hand and on the other hand a heat transfer fluid is applied to it.
  • the heat transfer fluid for example a heat transfer oil
  • the heat exchanger device 6 is constructed in the manner of a cooling tower which has a packing installation 7, onto which the heat transfer fluid is sprayed via the nozzles 5.
  • air is drawn through the packing 7 from the bottom up, so that the air comes into direct contact with the heat transfer fluid flowing down through the packing 7.
  • the heat transfer fluid is collected in a collecting container 9, from which it is drawn off with the aid of a pump 10 and pressed through the evaporator 2 of the heat pump system 1 via the pipe 3.
  • a droplet separator 11 of conventional design is arranged above the nozzles 5, by means of which droplets of the heat transfer fluid entrained by the air flow are intercepted.
  • the heat transfer fluid emerging from the evaporator 2 has been cooled by the heat given off to the refrigerant circulating in the heat pump system 1, for example to a temperature of -11 ° C. in the appropriate operating position.
  • the heat transfer fluid which has been cooled to this point is now fed to the packing installation 7, so that it is heated by direct contact with the ambient air, which has a temperature of + 5 ° C, for example.
  • the condensation water which is deposited on the heat transfer fluid is carried along with the heat transfer fluid into the collecting container 9.
  • the heat transfer fluid is not miscible with water, as is the case, for example, with a heat transfer oil, a settling process results in a perfect separation of the condensed water taken up, so that it is separated from the Collection container 9 can be withdrawn at appropriate intervals.
EP19890109332 1988-08-05 1989-05-24 Verfahren zum Betrieb einer Wärmepumpenanlage Withdrawn EP0353410A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3826678U 1988-08-05
DE3826678A DE3826678A1 (de) 1988-08-05 1988-08-05 Verfahren zum betrieb einer waermepumpenanlage

Publications (2)

Publication Number Publication Date
EP0353410A2 true EP0353410A2 (de) 1990-02-07
EP0353410A3 EP0353410A3 (de) 1990-11-14

Family

ID=6360326

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890109332 Withdrawn EP0353410A3 (de) 1988-08-05 1989-05-24 Verfahren zum Betrieb einer Wärmepumpenanlage

Country Status (4)

Country Link
EP (1) EP0353410A3 (zh)
JP (1) JPH02101357A (zh)
DE (1) DE3826678A1 (zh)
NO (1) NO892569L (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4120794A1 (de) * 1991-06-24 1992-01-16 Hans Dr Ing Hoyer Anordnung von funktionselementen fuer abluftenergieversorgten verdampfer

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR706459A (fr) * 1930-02-22 1931-06-24 Liquide véhicule de chaleur ou de froid
US2146343A (en) * 1936-11-23 1939-02-07 Commercial Solvents Corp Heat transfer agent
US2413170A (en) * 1943-04-01 1946-12-24 Gen Electric Liquid stable at low temperatures
US2686407A (en) * 1952-09-05 1954-08-17 Ansul Chemical Co Method of elimination of refrigeration frost
GB1027990A (en) * 1964-01-08 1966-05-04 Chicago Bridge & Iron Co Process and apparatus for continuously dehydrating air
US3554914A (en) * 1967-09-05 1971-01-12 Continental Oil Co Heat transfer oil
FR2272350A1 (en) * 1974-05-21 1975-12-19 Lefebvre Louis Heat pump anti-freeze system - has liquid sprayer preventing ice formation on gas reheating circuit
DE2638367A1 (de) * 1976-08-26 1978-03-09 Motorheizung Gmbh Vor vereisung gesicherter verdampfer fuer waermepumpen zur aufnahme von waerme aus der umgebungsluft
DE2659608A1 (de) * 1976-12-30 1978-07-06 Kulmbacher Klimageraete Vorrichtung zum verhindern der vereisung von verdampfern
FR2409299A1 (fr) * 1977-11-22 1979-06-15 Uniroyal Inc Systemes de fluides de transfert de chaleur

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2723048A1 (de) * 1977-05-21 1978-11-23 Kupczik Guenter Verfahren zur durchfuehrung eines waermeaustausches in einer waermepumpe zwecks erwaermung eines heizmediums aus der umgebung und vorrichtung zur durchfuehrung des verfahrens

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR706459A (fr) * 1930-02-22 1931-06-24 Liquide véhicule de chaleur ou de froid
US2146343A (en) * 1936-11-23 1939-02-07 Commercial Solvents Corp Heat transfer agent
US2413170A (en) * 1943-04-01 1946-12-24 Gen Electric Liquid stable at low temperatures
US2686407A (en) * 1952-09-05 1954-08-17 Ansul Chemical Co Method of elimination of refrigeration frost
GB1027990A (en) * 1964-01-08 1966-05-04 Chicago Bridge & Iron Co Process and apparatus for continuously dehydrating air
US3554914A (en) * 1967-09-05 1971-01-12 Continental Oil Co Heat transfer oil
FR2272350A1 (en) * 1974-05-21 1975-12-19 Lefebvre Louis Heat pump anti-freeze system - has liquid sprayer preventing ice formation on gas reheating circuit
DE2638367A1 (de) * 1976-08-26 1978-03-09 Motorheizung Gmbh Vor vereisung gesicherter verdampfer fuer waermepumpen zur aufnahme von waerme aus der umgebungsluft
DE2659608A1 (de) * 1976-12-30 1978-07-06 Kulmbacher Klimageraete Vorrichtung zum verhindern der vereisung von verdampfern
FR2409299A1 (fr) * 1977-11-22 1979-06-15 Uniroyal Inc Systemes de fluides de transfert de chaleur

Also Published As

Publication number Publication date
JPH02101357A (ja) 1990-04-13
EP0353410A3 (de) 1990-11-14
NO892569L (no) 1990-02-06
NO892569D0 (no) 1989-06-21
DE3826678A1 (de) 1990-02-08

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