EP3623724A1 - Pompe à chaleur avec pré-chauffage / pré-refroidissement de la source de chaleur / froid - Google Patents

Pompe à chaleur avec pré-chauffage / pré-refroidissement de la source de chaleur / froid Download PDF

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Publication number
EP3623724A1
EP3623724A1 EP19196921.1A EP19196921A EP3623724A1 EP 3623724 A1 EP3623724 A1 EP 3623724A1 EP 19196921 A EP19196921 A EP 19196921A EP 3623724 A1 EP3623724 A1 EP 3623724A1
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EP
European Patent Office
Prior art keywords
heat
heat exchanger
water
transfer medium
circuit
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Withdrawn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
EP19196921.1A
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German (de)
English (en)
Inventor
Rob Hazes
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 EP3623724A1 publication Critical patent/EP3623724A1/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Withdrawn legal-status Critical Current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
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • 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
    • F25B30/02—Heat pumps of the compression type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
    • F24F2005/006—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground receiving heat-exchange fluid from the drinking or sanitary water supply circuit
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/003—Indoor unit with water as a heat sink or heat source
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/004—Outdoor unit with water as a heat sink or heat source
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
    • F25B2313/0233—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units in parallel arrangements
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/19—Pressures
    • F25B2700/195—Pressures of the condenser

Definitions

  • the invention relates to a heat pump, wherein energy is exchanged via a heat transfer medium between a heat or cold source and a room to be heated or cooled by heating or cooling indoor air or water for heating / cooling floor and / or radiators, which heat pump is provided with a first circuit, for circulation of the heat transfer medium between the heat or cold source and the space to be heated or cooled, and a second circuit for water, said heat pump comprising:
  • a heat pump absorbs heat at a low temperature, which is released again at a high temperature. This is usually accomplished by allowing a liquid (heat transfer medium) to evaporate at a low temperature and to allow the vapor to condense at a high temperature.
  • the boiling point must therefore be lowered in the first case and / or increased in the second case.
  • the boiling point can be increased by increasing the pressure with a compressor and lowered by lowering the pressure in an expansion valve.
  • the whole of evaporating, compressing, condensing and expanding forms a closed circuit for the circulating heat transfer medium. Energy is supplied to the heat pump (to the compressor) and heat is transferred from the evaporator to the condenser.
  • a heat pump is a closed cycle of a liquid with a low boiling point, for example Freon, which evaporates in the evaporator and condenses again into liquid in the condenser.
  • the expansion valve allows the liquid to relax to a lower pressure at the evaporating temperature. This causes the liquid to boil and absorb heat from the room to be cooled.
  • the heat transfer medium is colder than the environment, heat is supplied to it. The heat from the room is transferred to the heat transfer medium which evaporates completely.
  • the gaseous heat transfer medium is compressed to a higher pressure and temperature and fed to the condenser. The gas releases the extracted heat to the tap water and condenses back to liquid.
  • the compressor is the driving force in the entire process by moving the heat transfer medium. By moving the heat transfer medium in the opposite direction, heating can also be carried out with a heat pump, whereby heat is extracted from the tap water and released into the room air.
  • a heat pump according to the preamble of claim 1 is known from US2014/0000308A .
  • the second circuit connected to this known heat pump is a hot water circuit for heating a room by means of radiators and the first circuit extracts heat from the ambient air (by the first heat exchanger) and transfers this heat to the water in the hot water circuit (using the second heat exchanger).
  • the water in the hot water circuit must be pre-cooled under certain circumstances. This is done in the third heat exchanger.
  • the temperature of the water in the drinking tap water supply is high on summer days. This means that a lot of tap water is required to be able to release the absorbed heat. In the winter, the temperature of the water in the tap water pipe is low, which means that also a large quantity of tap water is needed from which sufficient heat can be extracted for heating the air. In autumn and spring the temperature of the water in the drinking tap water pipe is good for heating or cooling, but the need for this is then the lowest.
  • the heat pump according to the invention is characterized in that the second circuit forms part of the heat or cold source and is provided with two connections for connection to an open water supply circuit.
  • the drinking water pipe is preferably used for this.
  • An embodiment of the heat pump according to the invention is characterized in that a control valve is in the water supply line with which during cooling the amount of tap water through the second heat exchanger is controlled, which control valve is controlled by the pressure of the heat transfer medium at the second heat exchanger, and that a bypass line is present parallel to the control valve, in which bypass line a further control valve is present with which the amount of tap water is controlled by the second heat exchanger during heating.
  • the second heat exchanger acts as an evaporator and the pressure of the heat transfer medium at the location of the second heat exchanger is such low that the control valve is completely closed. Therefore, during heating, the amount of tap water can be controlled by the further control valve in the bypass line.
  • the invention also relates to a method for heating or cooling a room with the aid of a heat pump according to the invention, wherein heat is extracted from water in the second circuit or heat is released from water in the second circuit using the second heat exchanger, wherein if the water in the second circuit is warmer or colder than a set limit value corresponding to a COP which is defined as a lower limit, the water is pre-cooled or pre-heated using the third heat exchanger, and wherein heat is extracted or released from the room using the first heat exchanger.
  • FIG. 1 shows the heat pump according to the invention schematically.
  • energy is exchanged via a heat transfer medium between a heat or cold source formed by water in the drinking water pipe and indoor air 14 to be heated or cooled.
  • Freon is taken as heat transfer medium, but other known liquids could also be taken for this.
  • the heat pump has a compressor 1 for compressing the heat transfer medium in the gaseous state and an expansion valve 2 for lowering the pressure of the heat transfer medium in the liquid state. Between the compressor and the expansion valve there are two heat exchangers 3 and 5 for effecting a phase transition between liquid and gas (condensing or evaporating) of the heat transfer medium.
  • one heat exchanger effects a phase transition from liquid to gas (evaporation) and the other heat exchanger from gas to liquid (condensing).
  • a first of the heat exchangers 3 exchanges energy with the air to be heated / cooled and is for this purpose provided with a fan 6 for blowing inside air through the first heat exchanger.
  • the second heat exchanger 5 exchanges energy with the tap water and for this purpose is connected to a water supply line 15 and a water discharge line 16.
  • the compressor, the first heat exchanger, the expansion valve and the second heat exchanger form a closed circuit for the heat transfer medium.
  • control valve 11 In the water supply line there is a control valve 11 with which, during the condensation of the heat transfer medium, the amount of tap water going through the second heat exchanger 5 is controlled.
  • This control valve is pressure-controlled and is controlled by the pressure of the heat transfer medium at the location of the second heat exchanger 5.
  • a bypass line with a further control valve 17 and a shut-off valve 18 is parallel to the control valve 11. During the evaporation of the heat transfer medium, the amount of water through the second heat exchanger 5 is controlled by the further control valve 17 by opening shut-off valve 18.
  • the heat pump further has a third heat exchanger 4 for pre-heating or pre-cooling the tap water by the heat transfer medium.
  • This third heat exchanger 4 is present in the heat transfer medium circuit via a bypass line between the expansion valve 2 and the compressor 1 and parallel to the first heat exchanger 3 and can be connected in series with the second heat exchanger 5 in the tap water circuit.
  • the flow of the heat transfer medium through the third heat exchanger 4 can be controlled by a control valve 7 which is present in a bypass line over the first heat exchanger 3.
  • the supply line 15 of the tap water can be led directly via a first branch to the second heat exchanger 5 or via a second branch first through the third heat exchanger 4 and then to the second heat exchanger 5.
  • shut-off valves 9 and 12 in both branches. Depending on whether they are opened or closed, the tap water can be controlled.
  • the temperature of the medium is measured in the bypass line and if the temperature is too low, the valves 8 and 10 in the bypass line are closed, thereby preventing the medium from entering the third heat exchanger to freeze.
  • FIGs 1 and 2 show the situation during cooling the indoor air 14, wherein the first heat exchanger 3 acts as an evaporator and the second heat exchanger 5 acts as a condenser. In this situation, the third heat exchanger 4 also functions as an evaporator.
  • Figure 1 shows the situation without pre-cooling the tap water. In this situation, valve 12 is open and valve 9 is closed. The tap water flows directly via the supply pipe 15 to the second heat exchanger 5.
  • Figure 2 shows the situation in which the tap water is pre-cooled. In this situation, valve 12 is closed and valve 9 is open.
  • the tap water then flows via the supply line 15 first through the third heat exchanger and then to the second heat exchanger 5.
  • the heat transfer medium reduced in temperature by expansion herein cools the tap water that flows to the second heat exchanger. This happens in the summer when the tap water is relatively warm (for example 25 °C), which would otherwise require a lot of tap water to allow the heat transfer medium to condense.
  • the compressor is allowed to work harder. The water saving achieved in this way more than outweighs the costs for the extra energy that the compressor requires.
  • Figures 3 and 4 show the situation during the heating of the indoor air 14, wherein the first heat exchanger 3 acts as a condenser and the second heat exchanger 5 acts as an evaporator. In this situation, the third heat exchanger 4 also functions as a condenser.
  • Figure 3 shows the situation without pre-heating the tap water. In this situation, valve 12 is open and valve 9 is closed. The tap water flows directly via the supply line 15 to the second heat exchanger 5.
  • Figure 4 shows the situation in which the tap water is pre-heated. In this situation, valve 12 is closed and valve 9 is open. The tap water flows through the supply pipe 15 first through the third heat exchanger and then to the second heat exchanger 5.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Other Air-Conditioning Systems (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
EP19196921.1A 2018-09-13 2019-09-12 Pompe à chaleur avec pré-chauffage / pré-refroidissement de la source de chaleur / froid Withdrawn EP3623724A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL2021626A NL2021626B9 (nl) 2018-09-13 2018-09-13 Warmtepomp met voorverwarming / voorkoeling van warmte / koude bron

Publications (1)

Publication Number Publication Date
EP3623724A1 true EP3623724A1 (fr) 2020-03-18

Family

ID=68468533

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19196921.1A Withdrawn EP3623724A1 (fr) 2018-09-13 2019-09-12 Pompe à chaleur avec pré-chauffage / pré-refroidissement de la source de chaleur / froid

Country Status (2)

Country Link
EP (1) EP3623724A1 (fr)
NL (1) NL2021626B9 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111486531A (zh) * 2020-04-07 2020-08-04 华信咨询设计研究院有限公司 多源梯级换热方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1965145A1 (fr) * 2005-12-08 2008-09-03 Sharp Kabushiki Kaisha Dispositif d'alimentation en eau chaude de pompe a chaleur
WO2010143373A1 (fr) * 2009-06-11 2010-12-16 パナソニック株式会社 Système de pompe à chaleur
US20140000308A1 (en) 2007-06-22 2014-01-02 Panasonic Corporation Refrigerant circuit
US20140109611A1 (en) * 2012-10-18 2014-04-24 Mitsubishi Electric Corporation Heat pump apparatus
KR101716320B1 (ko) * 2015-10-30 2017-03-14 에이스냉동공조 주식회사 공간 절약형 냉방장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1965145A1 (fr) * 2005-12-08 2008-09-03 Sharp Kabushiki Kaisha Dispositif d'alimentation en eau chaude de pompe a chaleur
US20140000308A1 (en) 2007-06-22 2014-01-02 Panasonic Corporation Refrigerant circuit
WO2010143373A1 (fr) * 2009-06-11 2010-12-16 パナソニック株式会社 Système de pompe à chaleur
US20140109611A1 (en) * 2012-10-18 2014-04-24 Mitsubishi Electric Corporation Heat pump apparatus
KR101716320B1 (ko) * 2015-10-30 2017-03-14 에이스냉동공조 주식회사 공간 절약형 냉방장치

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111486531A (zh) * 2020-04-07 2020-08-04 华信咨询设计研究院有限公司 多源梯级换热方法

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NL2021626B1 (nl) 2020-05-06
NL2021626B9 (nl) 2020-07-20

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