EP2489944A1 - Wärmegenerator mit CO2-betriebenem Dampfkompressionszyklus - Google Patents

Wärmegenerator mit CO2-betriebenem Dampfkompressionszyklus Download PDF

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Publication number
EP2489944A1
EP2489944A1 EP11425040A EP11425040A EP2489944A1 EP 2489944 A1 EP2489944 A1 EP 2489944A1 EP 11425040 A EP11425040 A EP 11425040A EP 11425040 A EP11425040 A EP 11425040A EP 2489944 A1 EP2489944 A1 EP 2489944A1
Authority
EP
European Patent Office
Prior art keywords
heat
secondary circuits
compressor
thermo
coolant
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Withdrawn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
EP11425040A
Other languages
English (en)
French (fr)
Inventor
Giuseppe Giovanni Renna
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.)
Thermocold Costruzioni SRL
Original Assignee
Thermocold Costruzioni 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 Thermocold Costruzioni SRL filed Critical Thermocold Costruzioni SRL
Priority to EP11425040A priority Critical patent/EP2489944A1/de
Publication of EP2489944A1 publication Critical patent/EP2489944A1/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Withdrawn legal-status Critical Current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
    • F25B6/00—Compression machines, plants or systems, with several condenser circuits
    • F25B6/04—Compression machines, plants or systems, with several condenser circuits arranged in series
    • 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
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
    • F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
    • 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
    • F25B2309/00—Gas cycle refrigeration machines
    • F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
    • F25B2309/061—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide with cycle highest pressure above the supercritical pressure

Definitions

  • the present patent application relates to a thermal generator with vapor compression cycle optimized for functioning with a CO2 transcritical cycle, studied to make the independent usage of the machine by two different users possible and convenient, which by way of example and in a not limiting way are made up of terminals for heating ambients and for the production of hot water for sanitary usage.
  • a cooling fluid air or water
  • carbon dioxide can be used as any other coolant, operating in a subcritical cycle.
  • the different pressure level requires suitable components and plant measures.
  • the cooling fluid is available at temperatures higher than 20°C it is necessary to operate according to a so-called transcritical cycle, wherein in the high pressure exchanger typical of a vapor compression cycle, it is no more provided the coexistence of the two phases, but only of the vapor phase.
  • the water contained in the tank begins to be heated, since the sole subtraction of heat by the cooling coil cannot be sufficient to compensate the heat intake provided by the heat pump.
  • the heat exchanger efficiency cooling CO2 in gaseous phase by heating water and the heat pump efficiency decrease, until the time of stopping the same heat pump is reached.
  • Object of the present invention is to provide a cooling circuit by which a CO2 transcritical vapor compression cycle is operated, which can guarantee constant efficiency in serving two completely independent users.
  • the circuit according to the present invention comprises at least an air-coolant heat exchanger functioning as an evaporator (1), two water-coolant heat exchangers (2, 3) functioning as gas cooler, since the coolant in the transcritical cycle remains constantly in vapor phase, a fan for the evaporator (4), two pumps (5, 6) for circulating water for the gas cooler, an electronic expansion valve (7), a compressor (8) possibly provided with an exchanger for controlling the temperature of the oil (9), an accumulation tank (10).
  • the solution used according to the state of the art for the production of both sanitary hot water and hot water for heating purpose at the same time is to use a vertical accumulation tank for sanitary hot water connected with the CO2 functioning machine, wherein the inlet of the CO2 functioning machine delivery is at the top of the tank and the intake is carried out on the bottom where there is connected the make-up system.
  • a cooling coil to use the highest temperature and supply terminals with temperatures, which by way of example, can be about 90°C.
  • a lower area of the tank where there is water at lower temperature owing to the stratification, there can be applied another cooling coil to supply radiant panels between 30°C and 35°C.
  • the heat exchanger (2) serving the heating circuit can serve, by way of example, terminals working at water inlet temperature between 80°C and 60°C and output temperature of 30°C, as for example the common radiators, or any kind of water terminal designed for cooling ambients. These terminals working at typical water inlet-output temperatures of 7° and 12°C can work with good thermal performance depending on the heating if supplied between 60° and 80°C at an output temperature of 30°C.
  • the pump (6) mounted in the circuit connected with the heat exchanger (3) for the production of sanitary hot water begins functioning only when there is sanitary hot water demand by the users, and the consequent making up of cold water in the accumulation tank which, by decreasing the inlet water temperature on the user side in the heat exchanger (3) guarantees proper efficiency of the heat exchange in the same exchanger (3).
  • the machine provides the heating function independently from the production of sanitary water.
  • the exchanger (2) is supplied directly by the thermo-vector fluid returning from the ambient terminals, with a temperature difference of at least 30°C between delivery and backflow, which can guarantee an efficient heat exchange in the exchanger (2) and consequently maintain the heat pump efficiency at acceptable levels.
  • a tank (11) with thermal inertia function on the heating water circuit connected with the exchanger (2) can be conveniently mounted on the backflow circuit (12) with an accumulation temperature which, by way of example, can be about 30°C.
EP11425040A 2011-02-18 2011-02-18 Wärmegenerator mit CO2-betriebenem Dampfkompressionszyklus Withdrawn EP2489944A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11425040A EP2489944A1 (de) 2011-02-18 2011-02-18 Wärmegenerator mit CO2-betriebenem Dampfkompressionszyklus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11425040A EP2489944A1 (de) 2011-02-18 2011-02-18 Wärmegenerator mit CO2-betriebenem Dampfkompressionszyklus

Publications (1)

Publication Number Publication Date
EP2489944A1 true EP2489944A1 (de) 2012-08-22

Family

ID=44118520

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11425040A Withdrawn EP2489944A1 (de) 2011-02-18 2011-02-18 Wärmegenerator mit CO2-betriebenem Dampfkompressionszyklus

Country Status (1)

Country Link
EP (1) EP2489944A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUB20154857A1 (it) * 2015-10-27 2017-04-27 Thermocold Costr Srl Macchina a pompa di calore a doppio evaporatore in serie
CN112628850A (zh) * 2020-12-21 2021-04-09 广州市城市规划勘测设计研究院 一种分体式双源热泵空调机组及其运行方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005002282A1 (de) * 2005-01-18 2006-07-27 Stiebel Eltron Gmbh & Co. Kg Wärmepumpenkreis einer Lüftungsanlage
FR2906603A1 (fr) * 2006-09-28 2008-04-04 Heliotrans Sarl Module utilisable pour le stockage et le transfert thermique
WO2010064923A1 (en) * 2008-12-02 2010-06-10 Varmepumpen As Heat pump/air conditioning apparatus with sequential operation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005002282A1 (de) * 2005-01-18 2006-07-27 Stiebel Eltron Gmbh & Co. Kg Wärmepumpenkreis einer Lüftungsanlage
FR2906603A1 (fr) * 2006-09-28 2008-04-04 Heliotrans Sarl Module utilisable pour le stockage et le transfert thermique
WO2010064923A1 (en) * 2008-12-02 2010-06-10 Varmepumpen As Heat pump/air conditioning apparatus with sequential operation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUB20154857A1 (it) * 2015-10-27 2017-04-27 Thermocold Costr Srl Macchina a pompa di calore a doppio evaporatore in serie
CN112628850A (zh) * 2020-12-21 2021-04-09 广州市城市规划勘测设计研究院 一种分体式双源热泵空调机组及其运行方法

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