WO2018010708A1 - Circuit de refroidissement pour circulation de milieu de refroidissement - Google Patents

Circuit de refroidissement pour circulation de milieu de refroidissement Download PDF

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Publication number
WO2018010708A1
WO2018010708A1 PCT/CZ2017/050028 CZ2017050028W WO2018010708A1 WO 2018010708 A1 WO2018010708 A1 WO 2018010708A1 CZ 2017050028 W CZ2017050028 W CZ 2017050028W WO 2018010708 A1 WO2018010708 A1 WO 2018010708A1
Authority
WO
WIPO (PCT)
Prior art keywords
cooling
cooling medium
compressor
turbine
electrical energy
Prior art date
Application number
PCT/CZ2017/050028
Other languages
English (en)
Inventor
Petr Fuchs
Original Assignee
Zefira Consulting, SE
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 Zefira Consulting, SE filed Critical Zefira Consulting, SE
Publication of WO2018010708A1 publication Critical patent/WO2018010708A1/fr

Links

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
    • 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
    • F25B11/00—Compression machines, plants or systems, using turbines, e.g. gas turbines
    • F25B11/02—Compression machines, plants or systems, using turbines, e.g. gas turbines as expanders

Definitions

  • Cooling circuits consist of a compressor, a heat exchanger, a throttling means and an evaporator.
  • the compressor provides exhaustion of the cooling medium vapor from the evaporator.
  • the compressor compacts the cooling medium, thereby increasing its temperature; transfer of the heat into the surroundings and cooling down of the cooling medium occurs in the heat exchanger, which causes it to condense.
  • the liquid cooling medium passes through the throttling means, in which the pressure drops sharply, causing the cooling medium pressure to drop to a vapor pressure.
  • the cooling medium then evaporates in the evaporator, transfers the heat from the surroundings and returns to the compressor.
  • freons as the exclusive cooling medium in the above-described device is disadvantageous due to the negative damaging effect of freons released into the atmosphere on the ozone layer and therefore trend is to cease the use thereof.
  • a cooling circuit for cooling medium circulation characterized in that it consists of a compressor which is mechanically connected by its outlet to an inlet of a turbine with an electrical energy generator, while the turbine with an electrical energy generator is further connected by its outlet to an inlet of an evaporator for supplying heat to the cooling medium, while the evaporator is further connected by its outlet to the inlet of the compressor.
  • the individual elements of the cooling circuit that is, the compressor, the turbine with electrical energy generator and the evaporator for supplying heat to the cooling medium, are interconnected by commonly used mechanical coupling elements.
  • gas with a high pressure gradient as a cooling medium, for example CO2.
  • a cooling medium for example CO2.
  • Coupling elements between individual components are, for example, commonly used high-strength pipes, armored hoses or high-strength pipes in combination with armored hoses.
  • Fig. 1 schematically shows a cooling circuit known in the art, comprising a compressor, a throttling means, a heat exchanger and an evaporator.
  • Fig. 2 schematically shows a cooling circuit for cooling medium circulation according to the present invention, consisting of an evaporator, a turbine with a generator and a compressor.
  • Fig. 1 schematically shows a typical cooling circuit for cooling medium circulation known in the art consisting of a compressor 9, a heat exchanger 10, a throttling means H and an evaporator 3 for supplying heat to the cooling medium, interconnected in this order by high-strength pipes 12.
  • the heat is transferred from the surroundings to the cooling medium, as indicated by the direction 14 of heat flow into the cooling medium.
  • the heat exchanger 10 heat is transferred from the cooling medium into the surroundings and thus the cooling medium cools down, as indicated by the direction 15 of heat flow from the cooling medium.
  • the cooling medium circulates in the direction shown in Fig. 1 , see the flow direction 16 of compressed cooling medium flowing out of the compressor 9, or the flow direction 17 of expanded cooling medium exiting the throttling means V_.
  • the high- pressure cooling circuit consists of a compressor 9, a turbine 18 with an electrical energy generator, and an evaporator 13 for supplying heat to the cooling medium.
  • the exemplary embodiment is arranged in a way that the individual components are connected to each other by, for example, commonly used high-strength pipes 12, armored hoses or high- strength pipes 12 in combination with armored hoses, to provide circulation of the cooling medium.
  • the compressor 9 is connected by its cooling medium outlet to the inlet of the turbine 18 with the electrical energy generator, which is further connected by its outlet to the inlet of the evaporator 13 for supplying heat to the cooling medium which is further connected by its outlet to the inlet of the compressor 9.
  • the electric motor of the compressor 9 is further connected by the electrical conductor 19 to the external electrical energy source which takes care of its power supply.
  • the electrical energy generator is also electrically connected to the electric motor propelling the compressor 9, which allows transferring a portion of the energy obtained during throttling back to supply the electric motor of the compressor 9.
  • the cooling medium may be, for example, CO2 or other gas with sufficient pressure gradient.
  • piston or screw compressor may be used as the compressor 9.
  • the electrical energy generator is electrically connected to the compressor 9 propeller and allows the transfer of portion of the energy obtained during throttling back to the compressor 9. This results in higher efficiency of the circulation as the compressor consumes less electrical energy from the external source.
  • the cooling medium is cooled down on the turbine blades 5, which allows the standard heat exchanger 10 to be omitted in the cooling circuit.
  • the cooling medium energy is from the electrical energy generator transferred in the form of electrical energy to the compressor 9.
  • a high-pressure cooling circuit consists of a compressor 9, a heat exchanger 10, a turbine 18 with an electrical energy generator and a heat exchanger 13 for supplying heat to the cooling medium.
  • the exemplary embodiment is arranged so that the individual components are interconnected, for example, by commonly used high-strength pipes 12, armored hoses or high strength pipes 12 in combination with armored hoses.
  • the compressor 9 is mechanically connected by its outlet to the inlet of the heat exchanger 10, the heat exchanger 10 is further connected by its outlet to the inlet of the turbine 18 with the electrical energy generator, which is further connected by its outlet to the inlet of the evaporator 13 for heat transfer from the cooling medium, which is further by its outlet connected to the inlet of the compressor 9.
  • the electrical energy generator is electrically connected to the electric motor propelling the compressor 9 which allows to transfer a portion of the energy obtained during throttling back to power the electric motor of the compressor 9.
  • the electric motor of the compressor 9 is further connected by the electric conductor 19 to the external electrical energy source, and after the start, the electric motor of the compressor 9 is powered by the electrical energy generator.
  • the cooling medium may be, for example, CO2 or other gas with the sufficient pressure gradient.
  • piston or screw compressor may be used as the compressor 9. It compresses the cooling medium isoentropically and transfers it to the heat exchanger 10. Here, the isobaric cooling of the cooling medium takes place.
  • the cooling medium further proceeds to the turbine 8 with the generator and through the turbine 18 with the generator to the evaporator ⁇ 3 for supplying heat to the cooling medium.
  • the evaporator 13 for supplying heat to the cooling medium is connected to the compressor 9, . in which the entire circulation cycle of the cooling medium begins again.
  • Another exemplary embodiment is the use of the solution to increase the efficiency of existing cooling systems.
  • the turbine 18 with the generator is added to the existing cooling circuit for cooling medium circulation instead of the existing throttling means H and the generator is electrically connected to the compressor 9 propeller. This improved solution increases the efficiency of the existing cooling system.
  • Another exemplary embodiment is refurbishment of the existing cooling circuit for cooling medium circulation in which the heat exchanger is removed from the circuit.
  • a throttling turbine 8 with generator electrically connected to the compressor 9 propeller is added to the existing cooling circuit instead of the existing throttling means.
  • the existing cooling circuit due to the use of higher pressures, it is also necessary to replace portion of the coupling parts.
  • Functions and arrangement of the individual components are the same as in the exemplary embodiments above.
  • the above-mentioned exemplary embodiments can be advantageously supplemented by fans located in the evaporator 13 area, in the area near the turbine 18 with the electrical energy generator, or in both areas.
  • the cooling circuit is provided with the heat exchanger 10
  • the fan may be located also in the area near the heat exchanger TO.
  • the values provided in Table 1 are the input values for calculating the cooling factor and cooling performance of the air-conditioning unit with the cooling circuit in which the cooling medium is CO2 and the cooling circuit consists of the compressor 9, the heat exchanger 10, the evaporator 13 and the throttling turbine 18 with the generator.
  • the cooling factor By increasing the cooling power and energy production, the cooling factor will be increased by 31%.
  • An example of the use of the invention is also an outdoor air-conditioning unit for air-conditioning of residential building interior.
  • wet vapor is used and the cooling circuit is without a heat exchanger.
  • the cooling factor By increasing the cooling power and energy production, the cooling factor will be increased by 67%.
  • the invention can be used in cooling units of cold stores, freezers, refrigerators, for cooling in industrial production, in air-conditioning units of halls, shopping centers, office or residential buildings, further in air-conditioning units of vehicles such as buses, boats, cars, trams, trains or planes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

L'invention concerne un circuit de refroidissement pour la circulation d'un milieu de refroidissement constitué d'un compresseur (9) qui est relié mécaniquement par sa sortie à une entrée d'une turbine (18) avec un générateur d'énergie électrique. La turbine à générateur d'énergie électrique est en outre reliée par sa sortie à une entrée d'un évaporateur (13) pour fournir de la chaleur au milieu de refroidissement, et l'évaporateur est à son tour relié par sa sortie à l'entrée du compresseur (9).
PCT/CZ2017/050028 2016-07-15 2017-07-14 Circuit de refroidissement pour circulation de milieu de refroidissement WO2018010708A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZ2016-434A CZ2016434A3 (cs) 2016-07-15 2016-07-15 Chladicí okruh pro oběh chladicího média
CZPV2016-434 2016-07-15

Publications (1)

Publication Number Publication Date
WO2018010708A1 true WO2018010708A1 (fr) 2018-01-18

Family

ID=59519955

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CZ2017/050028 WO2018010708A1 (fr) 2016-07-15 2017-07-14 Circuit de refroidissement pour circulation de milieu de refroidissement

Country Status (2)

Country Link
CZ (1) CZ2016434A3 (fr)
WO (1) WO2018010708A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020022997A3 (fr) * 2019-06-24 2020-04-16 Ucanok Ugur Système de refroidissement convertissant la chaleur de l'air en énergie électrique

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0703420A2 (fr) * 1994-09-20 1996-03-27 Saga University Convertisseur d'énergie
WO2001042035A1 (fr) 1999-12-09 2001-06-14 Robert Bosch Gmbh Systeme de climatisation pour vehicules automobiles et procede pour l'exploitation d'un systeme de climatisation pour vehicules automobiles
US6644062B1 (en) * 2002-10-15 2003-11-11 Energent Corporation Transcritical turbine and method of operation
WO2006112157A1 (fr) * 2005-04-14 2006-10-26 Matsushita Electric Industrial Co., Ltd. Dispositif de cycle de refrigeration et procede d’actionnement de celui-ci
DE102015117492A1 (de) * 2015-10-14 2016-05-19 Mitsubishi Hitachi Power Systems Europe Gmbh Erzeugung von Prozessdampf mittels Hochtemperaturwärmepumpe
US20160197534A1 (en) * 2015-01-05 2016-07-07 Dennis Melvin WALKER Hvac system with energy recovery mechanism

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6321564B1 (en) * 1999-03-15 2001-11-27 Denso Corporation Refrigerant cycle system with expansion energy recovery
JP2005172336A (ja) * 2003-12-10 2005-06-30 Kansai Electric Power Co Inc:The 自然冷媒ヒートポンプシステム
GB2474259A (en) * 2009-10-08 2011-04-13 Ebac Ltd Vapour compression refrigeration circuit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0703420A2 (fr) * 1994-09-20 1996-03-27 Saga University Convertisseur d'énergie
WO2001042035A1 (fr) 1999-12-09 2001-06-14 Robert Bosch Gmbh Systeme de climatisation pour vehicules automobiles et procede pour l'exploitation d'un systeme de climatisation pour vehicules automobiles
US6644062B1 (en) * 2002-10-15 2003-11-11 Energent Corporation Transcritical turbine and method of operation
WO2006112157A1 (fr) * 2005-04-14 2006-10-26 Matsushita Electric Industrial Co., Ltd. Dispositif de cycle de refrigeration et procede d’actionnement de celui-ci
US20160197534A1 (en) * 2015-01-05 2016-07-07 Dennis Melvin WALKER Hvac system with energy recovery mechanism
DE102015117492A1 (de) * 2015-10-14 2016-05-19 Mitsubishi Hitachi Power Systems Europe Gmbh Erzeugung von Prozessdampf mittels Hochtemperaturwärmepumpe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020022997A3 (fr) * 2019-06-24 2020-04-16 Ucanok Ugur Système de refroidissement convertissant la chaleur de l'air en énergie électrique

Also Published As

Publication number Publication date
CZ306829B6 (cs) 2017-07-26
CZ2016434A3 (cs) 2017-07-26

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