EP2551612A3 - Supercritical-cycle heat pump - Google Patents

Supercritical-cycle heat pump Download PDF

Info

Publication number
EP2551612A3
EP2551612A3 EP12177749.4A EP12177749A EP2551612A3 EP 2551612 A3 EP2551612 A3 EP 2551612A3 EP 12177749 A EP12177749 A EP 12177749A EP 2551612 A3 EP2551612 A3 EP 2551612A3
Authority
EP
European Patent Office
Prior art keywords
pressure
refrigerant
poe oil
supercritical
heat pump
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.)
Granted
Application number
EP12177749.4A
Other languages
German (de)
French (fr)
Other versions
EP2551612B1 (en
EP2551612A2 (en
Inventor
Youhei Hotta
Yoshiyuki Kimata
Hajime Sato
Toshiyuki Goto
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Publication of EP2551612A2 publication Critical patent/EP2551612A2/en
Publication of EP2551612A3 publication Critical patent/EP2551612A3/en
Application granted granted Critical
Publication of EP2551612B1 publication Critical patent/EP2551612B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
    • 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
    • F25B31/00—Compressor arrangements
    • F25B31/002—Lubrication
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/39—Dispositions with two or more expansion means arranged in series, i.e. multi-stage expansion, on a refrigerant line leading to the same evaporator
    • 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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or 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
    • 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
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/13—Economisers
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/23—Separators
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/16—Lubrication
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2513—Expansion valves
    • 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
    • F25B2700/193—Pressures of the compressor
    • F25B2700/1931—Discharge pressures
    • 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
    • F25B2700/193—Pressures of the compressor
    • F25B2700/1933—Suction pressures
    • 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
    • F25B2700/21—Temperatures
    • F25B2700/2115—Temperatures of a compressor or the drive means therefor
    • F25B2700/21151—Temperatures of a compressor or the drive means therefor at the suction side of the compressor
    • 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
    • F25B2700/21—Temperatures
    • F25B2700/2115—Temperatures of a compressor or the drive means therefor
    • F25B2700/21152—Temperatures of a compressor or the drive means therefor at the discharge side of the compressor

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)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

A supercritical-cycle heat pump (1) that employs CO2 refrigerant as a working medium that is provided with an injection circuit (11) for injecting intermediate-pressure refrigerant gas being separated by a gas-liquid separator 6 into a sealed housing (14), having intermediate pressure in the interior thereof, in a multistage compressor (2), a controller (25) is provided, which determines the viscosity of the POE oil (17) on the basis of the solubility of the POE oil (17) in the CO2 refrigerant and temperature of the POE oil (17), the solubility of the POE oil (17) in the CO2 refrigerant being determined by pressure and temperature of intermediate-pressure refrigerant and which controls the pressure of the intermediate-pressure refrigerant by controlling a first electronic expansion valve (5) so that the pressure thereof is controlled within a preset usage limit range in order to keep the viscosity of the POE oil (17) above the certain viscosity zone.
EP12177749.4A 2011-07-29 2012-07-25 Supercritical-cycle heat pump Active EP2551612B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2011166353A JP5798830B2 (en) 2011-07-29 2011-07-29 Supercritical cycle heat pump

Publications (3)

Publication Number Publication Date
EP2551612A2 EP2551612A2 (en) 2013-01-30
EP2551612A3 true EP2551612A3 (en) 2014-03-26
EP2551612B1 EP2551612B1 (en) 2015-07-22

Family

ID=46634038

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12177749.4A Active EP2551612B1 (en) 2011-07-29 2012-07-25 Supercritical-cycle heat pump

Country Status (2)

Country Link
EP (1) EP2551612B1 (en)
JP (1) JP5798830B2 (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103363749A (en) * 2013-08-05 2013-10-23 上海理工大学 Method for controlling refrigerant mass flow rate through saturated isentropic compression exhaust temperature difference
CA2931108C (en) 2013-11-25 2022-01-04 The Coca-Cola Company Compressor with an oil separator
DE102014100093A1 (en) * 2014-01-07 2015-07-09 Kriwan Industrie-Elektronik Gmbh Refrigeration system and method for controlling the overheating of a refrigerant of a refrigeration system
US9482454B2 (en) * 2014-05-16 2016-11-01 Lennox Industries Inc. Compressor operation management in air conditioners
JP6656801B2 (en) * 2014-11-05 2020-03-04 三菱重工サーマルシステムズ株式会社 Two-stage compression refrigeration cycle device, control device thereof, and control method
CN107036331A (en) * 2015-07-15 2017-08-11 艾默生环境优化技术(苏州)有限公司 Air conditioning system and method for controlling heating of oil sump of compressor of air conditioning system
JP6814974B2 (en) * 2015-09-11 2021-01-20 パナソニックＩｐマネジメント株式会社 Refrigeration equipment
US10767912B2 (en) * 2015-10-08 2020-09-08 Mitsubishi Electric Corporation Refrigeration cycle apparatus
CN106225287B (en) * 2016-08-09 2019-02-12 宁波阿诺丹机械有限公司 A kind of high-efficiency carbon dioxide refrigeration system
CN106766442A (en) * 2016-11-16 2017-05-31 海信（山东）空调有限公司 A kind of acquisition methods of the reliable degree of superheat, control method and device and air-conditioning
CN107461955A (en) * 2017-08-30 2017-12-12 广东美芝制冷设备有限公司 Refrigeration system
US11073313B2 (en) * 2018-01-11 2021-07-27 Carrier Corporation Method of managing compressor start for transport refrigeration system
CN109489293B (en) * 2018-10-11 2019-11-08 珠海格力电器股份有限公司 air conditioning system
CN111306827B (en) * 2019-12-30 2023-08-29 冰山冷热科技股份有限公司 Wide-ring temperature type CO 2 Air source heat pump system
CN113719963B (en) * 2020-05-25 2022-12-27 青岛海尔空调电子有限公司 Oil return control method of multi-split air conditioning system
CN112303957B (en) * 2020-10-15 2021-10-08 珠海格力电器股份有限公司 Oil return control method for compressor
CN114963528B (en) * 2021-06-29 2023-08-18 青岛海尔新能源电器有限公司 Refrigerant detection method, device, equipment and storage medium
CN113587506B (en) * 2021-07-26 2022-06-14 珠海格力电器股份有限公司 Refrigerant return-air system and refrigerating unit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0976991A2 (en) * 1998-07-31 2000-02-02 Zexel Corporation Refrigerating cycle
US20060032267A1 (en) * 2004-08-12 2006-02-16 Sanyo Electric Co., Ltd. Refrigerant cycle apparatus
GB2446062A (en) * 2007-01-26 2008-07-30 Grasso Gmbh Refrigeration Tech Carbon dioxide refrigeration system with compressors in two-stage arrangement
EP2175212A1 (en) * 2007-06-29 2010-04-14 Daikin Industries, Ltd. Freezing device

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2656285B2 (en) * 1988-02-09 1997-09-24 株式会社東芝 Air conditioner
JP2991453B2 (en) * 1990-03-02 1999-12-20 株式会社日立製作所 Refrigeration cycle device compressor operation control device
JP3160130B2 (en) * 1993-09-30 2001-04-23 東芝キヤリア株式会社 Air conditioner
JP3510587B2 (en) * 2000-12-06 2004-03-29 三菱重工業株式会社 Cooling cycle for air conditioner and lubricating oil for cooling cycle
JP2006138525A (en) * 2004-11-11 2006-06-01 Hitachi Home & Life Solutions Inc Freezing device, and air conditioner
JP2006183950A (en) * 2004-12-28 2006-07-13 Sanyo Electric Co Ltd Refrigeration apparatus and refrigerator
JP5309424B2 (en) * 2006-03-27 2013-10-09 ダイキン工業株式会社 Refrigeration equipment

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0976991A2 (en) * 1998-07-31 2000-02-02 Zexel Corporation Refrigerating cycle
US20060032267A1 (en) * 2004-08-12 2006-02-16 Sanyo Electric Co., Ltd. Refrigerant cycle apparatus
GB2446062A (en) * 2007-01-26 2008-07-30 Grasso Gmbh Refrigeration Tech Carbon dioxide refrigeration system with compressors in two-stage arrangement
EP2175212A1 (en) * 2007-06-29 2010-04-14 Daikin Industries, Ltd. Freezing device

Also Published As

Publication number Publication date
JP2013029269A (en) 2013-02-07
JP5798830B2 (en) 2015-10-21
EP2551612B1 (en) 2015-07-22
EP2551612A2 (en) 2013-01-30

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