EP3040645A2 - Kohlenstoffdioxidbasiertes zusatzkühlsystem - Google Patents

Kohlenstoffdioxidbasiertes zusatzkühlsystem Download PDF

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Publication number
EP3040645A2
EP3040645A2 EP15202000.4A EP15202000A EP3040645A2 EP 3040645 A2 EP3040645 A2 EP 3040645A2 EP 15202000 A EP15202000 A EP 15202000A EP 3040645 A2 EP3040645 A2 EP 3040645A2
Authority
EP
European Patent Office
Prior art keywords
carbon dioxide
auxiliary
refrigeration system
side cycle
auxiliary cooling
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Withdrawn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
EP15202000.4A
Other languages
English (en)
French (fr)
Other versions
EP3040645A3 (de
Inventor
Robert Delventura
Ignacio Varela Chaparro
Steve Pfister
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.)
Heatcraft Refrigeration Products LLC
Original Assignee
Heatcraft Refrigeration Products LLC
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 Heatcraft Refrigeration Products LLC filed Critical Heatcraft Refrigeration Products LLC
Publication of EP3040645A2 publication Critical patent/EP3040645A2/de
Publication of EP3040645A3 publication Critical patent/EP3040645A3/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Withdrawn legal-status Critical Current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
    • F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next 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
    • 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—Component parts or details not otherwise provided for in this subclass
    • F25B2400/06—Several compression cycles arranged in parallel
    • 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—Component parts or details not otherwise provided for in this subclass
    • F25B2400/07—Details of compressors or related parts
    • F25B2400/075—Details of compressors or related parts with parallel compressors
    • 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
    • F25B40/00—Subcoolers, desuperheaters or superheaters
    • 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
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel

Definitions

  • the present application and the resultant patent relate generally to refrigeration systems and more particularly relate to a carbon dioxide based auxiliary cooling system for a refrigeration system that may be free of the use of hydrofluorocarbons and the like.
  • Cascade refrigeration systems generally include a first side cooling cycle, or a high side cycle, and a second side cooling cycle, or a low side cooling cycle.
  • the two cooling cycles interface through a common heat exchanger, i.e., a cascade evaporator-condenser.
  • the cascade refrigeration system may provide cooling at very low temperatures in a highly efficient manner.
  • carbon dioxide based refrigeration systems may include a backup condensing unit with an independent power source to keep the carbon dioxide cool.
  • backup devices generally use hydrofluorocarbon based refrigerants such that the refrigeration system as a whole cannot be considered truly “green” or hydrofluorocarbon free.
  • the present application and the resultant patent thus provide a cascade refrigeration system.
  • the cascade refrigeration system may include a first side cycle, a second side cycle with a second side cycle carbon dioxide refrigerant, and an auxiliary cooling system to cool the second side cycle carbon dioxide refrigerant in the event of a power outage.
  • the auxiliary cooling system may include an auxiliary carbon dioxide refrigerant.
  • the present application and the resultant patent further provide a method of providing auxiliary cooling in a refrigeration system.
  • the method may include the steps of flowing a natural refrigerant through a first side cycle, flowing a carbon dioxide refrigerant through a second side cycle, providing an auxiliary cooling system to cool the flow of the carbon dioxide refrigerant in the case of a power loss, and flowing an auxiliary carbon dioxide refrigerant through the auxiliary cooling system.
  • the present application and the resulting patent further provide a carbon dioxide based refrigeration system.
  • the carbon dioxide based refrigeration system may include a receiver, a carbon dioxide refrigerant, and an auxiliary cooling system in communication with the receiver to cool the carbon dioxide refrigerant in the event of a power outage.
  • the auxiliary cooling system may include an auxiliary carbon dioxide refrigerant.
  • Fig. 1 shows an example of a cascade refrigeration system 100.
  • the cascade refrigeration system 100 may be used to cool any type of enclosure for use in, for example, supermarkets, cold storage, and the like.
  • the cascade refrigeration system 100 also may be applicable to heating, ventilation, and air conditioning and/or different types of industrial applications.
  • the overall cascade refrigeration system 100 may have any suitable size or capacity.
  • the cascade refrigeration system 100 may include a first or a high side cycle 110 and a second or a low side cycle 120.
  • the high side cycle 110 may include a high side compressor 130, a high side oil separator 140, a high side condenser 150, a high side receiver 160, and a high side expansion device 170.
  • the high side cycle 110 also may include a suction/liquid heat exchanger 180 and a suction accumulator 190.
  • the high side cycle 110 may include a flow of a natural refrigerant 200.
  • the natural refrigerant 200 may include a flow of ammonia, a flow of hydrocarbons, and the like. Other components and other configurations may be used herein.
  • the low side cycle 120 similarly may include a low side compressor 210, a low side oil separator 220, a low side receiver 230, a low side expansion device 240, and one or more low side evaporators 250.
  • the low side cycle 120 may include a medium temperature loop 260 with a pump 270 and a number of flow valves 280 as well as a low temperature loop 290.
  • An accumulator 300 also may be used therein.
  • the low side cycle 120 may include a flow of a carbon dioxide based refrigerant 310 and the like. Other components and other configurations may be used herein.
  • the two cycles 110, 120 may interface through a cascade evaporator/condenser 320.
  • the respective flows of the refrigerants 200, 310 may exchange heat via the cascade evaporator/condenser 320.
  • the cascade evaporator/condenser 320 may have any suitable size or capacity. Other components and other configurations may be used herein.
  • the natural refrigerant 200 may be compressed by the high side compressor 130 and condensed in the high side condenser 150.
  • the refrigerant 200 may be stored in the high side receiver 160 and may be withdrawn as needed to satisfy the load on the cascade evaporator/condenser 320.
  • the refrigerant 200 then may pass through the high side expansion device 170 and returns to the high side compressor 130.
  • the suction/liquid heat exchanger 180 may be used to sub-cool the refrigerant 200 before entry into the cascade evaporator/condenser 320.
  • the low side cycle 120 may be similar.
  • the carbon dioxide based refrigerant 310 may be compressed by the low side compressor 210 and then pass through the cascade evaporator/condenser 320.
  • the refrigerant 310 may be stored within the low side receiver 230 and withdrawn as needed.
  • the refrigerant 310 may pass through one or more low side expansion devices 240 and one or more low side evaporators 250.
  • the low side cycle 120 may be separated into the low temperature loop 290 and the medium temperature loop 260.
  • the cascade refrigeration system 100 also may include an auxiliary cooling system 330.
  • the cooling auxiliary system 330 may be used to cool the flow of the carbon dioxide refrigerant 310 via an interface with the low side receiver 230 or elsewhere.
  • the auxiliary cooling system 330 may include an auxiliary compressor 340, an auxiliary condenser 350, and an auxiliary expansion device 360.
  • the cooling auxiliary system 330 may include a generator 370 or other type of independent power supply.
  • the auxiliary cooling system 330 may interface with the low side cycle 120 via an auxiliary condenser/evaporator 380.
  • Known auxiliary cooling systems 330 generally use a hydrofluorocarbon based refrigerant 390 such as R404A or R407A. Other components and other configurations may be used herein.
  • Fig. 2 shows a cascade refrigeration system 400 as may be described herein.
  • the cascade refrigeration system 400 may include the same or a similar high side cycle 110 and low side cycle 120.
  • the two cycles may interface via the cascade evaporator/condenser 320 and the like.
  • the low side cycle 120 includes the flow of the carbon dioxide based refrigerant 310.
  • the cascade refrigeration system 400 also may include a carbon dioxide based auxiliary cooling system 410.
  • the carbon dioxide auxiliary cooling system 410 may include an auxiliary compressor 420, an auxiliary condenser 430, and an auxiliary expansion device 440.
  • the carbon dioxide auxiliary cooling system 410 may include an auxiliary generator 450 or other type of independent power supply.
  • the carbon dioxide auxiliary cooling system 410 may interface with the low side cycle 120 via an auxiliary condenser/evaporator 460 or other type of heat exchange device.
  • the carbon dioxide auxiliary cooling system 410 includes a flow of a carbon dioxide based refrigerant 470 therein. Other types of natural refrigerants also may be used herein. Other components and other configurations may be used herein.
  • the carbon dioxide auxiliary cooling system 410 may be used to cool the flow of the carbon dioxide refrigerant 310 in the low side cycle 120 via the carbon dioxide refrigerant 470 circulating therein and interfacing at the auxiliary condenser/evaporator 460.
  • the cascade refrigeration system 400 thus is truly a hydrofluorocarbon free system.
  • the carbon dioxide based auxiliary cooling system 410 may provide a faster overall response time in a proactive method of cooling the flow of carbon dioxide refrigerant 310 without venting. Multiple carbon dioxide auxiliary cooling systems 410 may be used herein.
  • Fig. 3 shows an alternative embodiment of a carbon dioxide auxiliary cooling system 500 as may be described herein.
  • the carbon dioxide auxiliary cooling system 500 may include an auxiliary compressor 510, an auxiliary gas cooler 520 or condenser, and an auxiliary expansion device 530.
  • the carbon dioxide auxiliary cooling system 500 also may include an auxiliary generator or other type of independent power source.
  • the carbon dioxide auxiliary cooling system 500 also includes a flow of a carbon dioxide based refrigerant 540 therein. Other components and other configurations may be used herein.
  • the carbon dioxide auxiliary system 500 may tie directly into the low side cycle 120 via the low side cycle receiver 230 for heat exchange therewith.
  • the carbon dioxide auxiliary system 500 thus avoids the need for an auxiliary condenser/evaporator and/or pump in a truly a hydrofluorocarbon free system.
  • the carbon dioxide based auxiliary system 500 also may provide a faster overall response time in a proactive method of cooling the flow of carbon dioxide refrigerant 310 without venting.
  • the carbon dioxide based auxiliary cooling systems have been shown in the context of a cascade refrigeration system, the carbon dioxide based auxiliary cooling systems may be used in any type of carbon dioxide refrigeration system. Specifically, any type of carbon dioxide refrigeration system using a large receiver tank and the like.

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)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
EP15202000.4A 2014-12-22 2015-12-22 Kohlenstoffdioxidbasiertes zusatzkühlsystem Withdrawn EP3040645A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US14/578,668 US20160178244A1 (en) 2014-12-22 2014-12-22 Carbon Dioxide Based Auxiliary Cooling System

Publications (2)

Publication Number Publication Date
EP3040645A2 true EP3040645A2 (de) 2016-07-06
EP3040645A3 EP3040645A3 (de) 2016-11-02

Family

ID=55237473

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15202000.4A Withdrawn EP3040645A3 (de) 2014-12-22 2015-12-22 Kohlenstoffdioxidbasiertes zusatzkühlsystem

Country Status (6)

Country Link
US (1) US20160178244A1 (de)
EP (1) EP3040645A3 (de)
AU (1) AU2015261588A1 (de)
BR (1) BR102015032005A2 (de)
CA (1) CA2911696A1 (de)
MX (1) MX2015017458A (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10429102B2 (en) 2016-01-05 2019-10-01 Carrier Corporation Two phase loop distributed HVACandR system
US10767909B2 (en) * 2017-08-02 2020-09-08 Heatcraft Refrigeration Products Llc Thermal storage of carbon dioxide system for power outage
DK3737894T3 (da) 2018-01-11 2023-07-24 Copeland Ind Lp Kølesystem med dobbelt kaskade-varmeveksler og tilhørende driftsmetode
US11118817B2 (en) * 2018-04-03 2021-09-14 Heatcraft Refrigeration Products Llc Cooling system
US11187445B2 (en) * 2018-07-02 2021-11-30 Heatcraft Refrigeration Products Llc Cooling system
JP7471515B2 (ja) * 2021-04-21 2024-04-19 三菱電機株式会社 二元冷凍サイクル装置
CN114383336B (zh) * 2021-12-31 2023-08-08 南京久鼎环境科技股份有限公司 一种co2制冷系统的停机压力维持装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007178072A (ja) * 2005-12-28 2007-07-12 Sanden Corp 車両用空調装置
US8631666B2 (en) * 2008-08-07 2014-01-21 Hill Phoenix, Inc. Modular CO2 refrigeration system
AR078902A1 (es) * 2009-11-03 2011-12-14 Du Pont Sistema de refrigeracion en cascada con refrigerante de fluoroolefina
JP5054180B2 (ja) * 2010-11-04 2012-10-24 サンデン株式会社 ヒートポンプ式暖房装置
WO2014100330A1 (en) * 2012-12-21 2014-06-26 Martin J Scott Refrigeration system with absorption cooling

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
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Also Published As

Publication number Publication date
AU2015261588A1 (en) 2016-07-07
EP3040645A3 (de) 2016-11-02
US20160178244A1 (en) 2016-06-23
BR102015032005A2 (pt) 2016-10-25
MX2015017458A (es) 2016-06-21
CA2911696A1 (en) 2016-06-22

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