EP2331887A1 - Capacity boosting during pulldown - Google Patents
Capacity boosting during pulldownInfo
- Publication number
- EP2331887A1 EP2331887A1 EP09816707A EP09816707A EP2331887A1 EP 2331887 A1 EP2331887 A1 EP 2331887A1 EP 09816707 A EP09816707 A EP 09816707A EP 09816707 A EP09816707 A EP 09816707A EP 2331887 A1 EP2331887 A1 EP 2331887A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- stages
- refrigerant
- valve
- set forth
- valves
- 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- Withdrawn
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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control 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
- 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
- F25B2400/07—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
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
-
- 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
- F25B2600/2507—Flow-diverting valves
Definitions
- This invention relates generally to transport refrigeration systems and, more particularly, to a method for boosting compressor capacity during pulldown operating conditions.
- a second compressor is caused to operate in parallel with the primary compressor to temporarily boost the capacity of the system.
- a two-stage compressor arrangement has a plurality of valves that are operated in such a way as to cause the two-stages to operate in parallel rather than in series operation to thereby boost the capacity of the system.
- FIG. 1 is a schematic illustration of a transcritical refrigeration system with the present invention incorporated therein.
- FIG. 2 is a schematic illustration of one embodiment thereof.
- FIGS. 3 and 4 are a schematic illustrations of another embodiment thereof.
- FIG. 1 Shown in FIG. 1, is a CO 2 refrigerant vapor compression system which includes a primary compression device 11 driven by a motor 12 operatively associated therewith, a refrigerant heat rejecting heat exchanger 13, and a refrigerant heat absorbing heat exchanger 14, also referred to herein as an evaporator, all connected in a closed loop refrigerant circuit in series refrigerant flow arrangement by various refrigerant lines 16, 17 and 18.
- the refrigerant vapor compression system 10 includes a filter drier 19 and a flash tank receiver 21 disposed in refrigerant line 17 of the refrigerant circuit downstream with respect to refrigerant flow of the refrigerant heat rejecting heat exchanger 13 and upstream with respect to refrigerant flow of the evaporator 14, and an evaporator expansion device 22, operatively associated with the evaporator 14, disposed in refrigerant line 17 downstream with respect to refrigerant flow of the flash tank receiver 21 and upstream with respect to refrigerant flow of the evaporator 14.
- the primary compression device 11 functions to compress and circulate CO 2 refrigerant through the refrigerant circuit, and may be a single or a multi-stage compressor such as, for example, a scroll compressor or a reciprocating compressor. In the case of a multiple stage compressor, both compression stages would be driven by the single motor 12 operatively associated in driving relationship with the compression mechanism of the compressor 11.
- the CO 2 refrigerant vapor compression system is designed to operate in a subcritical cycle.
- the refrigerant heat rejecting heat exchanger 13 is designed to operate as a refrigerant condensing heat exchanger through which hot, high pressure refrigerant vapor discharge from the compression device 11 passes in heat exchange relationship with a cooling medium to condense the refrigerant passing therethrough from a refrigerant vapor to refrigerant liquid.
- the refrigerant heat rejecting heat exchanger 13, which may also be referred to herein as a gas cooler or a condenser, may comprise a finned tube heat exchanger, such as, for example, a fin and round tube heat exchange coil or a fin and flat mini-channel tube heat exchanger.
- the typical cooling medium is ambient air passed through the condenser 13 in heat exchange relationship with the refrigerant by means of fan(s) 31 operatively associated with the condenser 13.
- the evaporator 14 constitutes a refrigerant evaporating heat exchanger which, in one form, may be a conventional finned tube heat exchanger, such as, for example, a fin and round tube heat exchange coil or a fin and mini- channel flat tube heat exchanger, through which expanded refrigerant, having traversed the expansion device 22, passes in heat exchange relationship with a heating fluid, whereby the refrigerant is vaporized and typically superheated.
- a conventional finned tube heat exchanger such as, for example, a fin and round tube heat exchange coil or a fin and mini- channel flat tube heat exchanger, through which expanded refrigerant, having traversed the expansion device 22, passes in heat exchange relationship with a heating fluid, whereby the refrigerant is vaporized and typically superheated.
- the heating fluid passed in heat exchange relationship with the refrigerant in the evaporator 14 may be air passed through the evaporator 14 by means of fan(s) 24 operatively associated with the evaporator 14, to be cooled and also commonly dehumidified, and thence supplied to a climate controlled environment which may include a perishable cargo, such as, for example, refrigerated or frozen food items, placed in a storage zone associated with a transport refrigeration system.
- a bypass valve 27 is provided to supplement the refrigerant flow through the expansion device 22 when higher mass flow is required by the refrigeration system. During normal operation, the primary compression device 11 is sufficient to meet the capacity requirements of the system.
- FIG. 2 A control logic diagram is shown in Fig. 2 to illustrate this operation.
- the controller 28 causes the motor 11 to drive the primary compression device 11 only.
- the controller 28 moves to block 36 so as to then operate the motor 29 to drive the booster compressor 31, in parallel with and in addition to the primary compression device 11.
- the control 28 then proceeds to block 33 for normal operation.
- the two-stage compressor is shown generally at 38 and comprises a first stage 39 and a second stage 41.
- a valve 42 is disposed therebetween.
- the valve 42 is open and the two-stage compressor 38 operates as a conventional two-stage compressor.
- valves 43 and 44 which are arranged in parallel relationship with the stage one 39 and stage two 41, respectively.
- the valve 42 is closed and the valves 43 and 44 are opened. The effect is to place the two stages 39 and 41 in parallel relationship as shown in Fig. 4 to thereby temporarily boost capacity of the system.
- the multi-stages compressor can be turned into a regular compressor when the pulldown is achieved or almost achieved, or when the distance between the suction and discharge pressures are too high and causing overheating of the discharge gas.
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)
- Control Of Positive-Displacement Pumps (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10092908P | 2008-09-29 | 2008-09-29 | |
PCT/US2009/057068 WO2010036540A1 (en) | 2008-09-29 | 2009-09-16 | Capacity boosting during pulldown |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2331887A1 true EP2331887A1 (en) | 2011-06-15 |
EP2331887A4 EP2331887A4 (en) | 2013-04-24 |
Family
ID=42060045
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09816707.5A Withdrawn EP2331887A4 (en) | 2008-09-29 | 2009-09-16 | Capacity boosting during pulldown |
Country Status (5)
Country | Link |
---|---|
US (1) | US20110162396A1 (en) |
EP (1) | EP2331887A4 (en) |
JP (1) | JP2012504221A (en) |
CN (1) | CN102165274A (en) |
WO (1) | WO2010036540A1 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012145156A1 (en) * | 2011-04-21 | 2012-10-26 | Carrier Corporation | Transcritical refrigerant vapor system with capacity boost |
US20120282114A1 (en) * | 2011-05-06 | 2012-11-08 | Tonand Brakes Inc. | Air pump |
KR101873595B1 (en) * | 2012-01-10 | 2018-07-02 | 엘지전자 주식회사 | A cascade heat pump and a driving method for the same |
EP3702184B1 (en) * | 2012-09-20 | 2024-03-06 | Thermo King LLC | Electrical transport refrigeration module |
US20150001849A1 (en) * | 2013-03-07 | 2015-01-01 | Regal Beloit America, Inc. | Energy Recovery Apparatus for a Refrigeration System |
US10543737B2 (en) | 2015-12-28 | 2020-01-28 | Thermo King Corporation | Cascade heat transfer system |
JP6394683B2 (en) * | 2016-01-08 | 2018-09-26 | 株式会社デンソー | Transportation refrigeration equipment |
US10570783B2 (en) * | 2017-11-28 | 2020-02-25 | Hanwha Power Systems Co., Ltd | Power generation system using supercritical carbon dioxide |
US11209190B2 (en) * | 2019-06-13 | 2021-12-28 | City University Of Hong Kong | Hybrid heat pump system |
Citations (7)
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---|---|---|---|---|
US2154136A (en) * | 1936-03-31 | 1939-04-11 | Carrier Corp | Fluid circulation system |
JPS5485455A (en) * | 1977-12-21 | 1979-07-07 | Mitsubishi Electric Corp | Refrigerating system |
US5570585A (en) * | 1994-10-03 | 1996-11-05 | Vaynberg; Mikhail | Universal cooling system automatically configured to operate in compound or single compressor mode |
US5768901A (en) * | 1996-12-02 | 1998-06-23 | Carrier Corporation | Refrigerating system employing a compressor for single or multi-stage operation with capacity control |
JP2003202161A (en) * | 2002-01-10 | 2003-07-18 | Hitachi Ltd | Freezing air conditioning device |
US20080011014A1 (en) * | 2005-02-17 | 2008-01-17 | Bitzer Kuhlmaschinenbau Gmbh | Refrigeration System |
US20080110200A1 (en) * | 2006-10-17 | 2008-05-15 | Bitzer Kuehlmaschinenbau Gmbh | Refrigerating Plant |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
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US4381650A (en) * | 1981-11-27 | 1983-05-03 | Carrier Corporation | Electronic control system for regulating startup operation of a compressor in a refrigeration system |
US4404811A (en) * | 1981-11-27 | 1983-09-20 | Carrier Corporation | Method of preventing refrigeration compressor lubrication pump cavitation |
US5177972A (en) * | 1983-12-27 | 1993-01-12 | Liebert Corporation | Energy efficient air conditioning system utilizing a variable speed compressor and integrally-related expansion valves |
JPS6346350A (en) * | 1986-08-11 | 1988-02-27 | 株式会社東芝 | Refrigeration cycle |
US4765150A (en) * | 1987-02-09 | 1988-08-23 | Margaux Controls, Inc. | Continuously variable capacity refrigeration system |
JP2541177B2 (en) * | 1991-02-15 | 1996-10-09 | ダイキン工業株式会社 | Refrigeration system operation controller |
CN1153887A (en) * | 1995-10-04 | 1997-07-09 | Lg电子株式会社 | Heat pump |
US5867998A (en) * | 1997-02-10 | 1999-02-09 | Eil Instruments Inc. | Controlling refrigeration |
US6286326B1 (en) * | 1998-05-27 | 2001-09-11 | Worksmart Energy Enterprises, Inc. | Control system for a refrigerator with two evaporating temperatures |
US6460355B1 (en) * | 1999-08-31 | 2002-10-08 | Guy T. Trieskey | Environmental test chamber fast cool down and heat up system |
TW479122B (en) * | 2000-03-15 | 2002-03-11 | Hitachi Ltd | Refrigerator |
US6843065B2 (en) * | 2000-05-30 | 2005-01-18 | Icc-Polycold System Inc. | Very low temperature refrigeration system with controlled cool down and warm up rates and long term heating capabilities |
US6619061B2 (en) * | 2001-12-26 | 2003-09-16 | York International Corporation | Self-tuning pull-down fuzzy logic temperature control for refrigeration systems |
JP2005001523A (en) * | 2003-06-12 | 2005-01-06 | Honda Motor Co Ltd | Air conditioner for vehicle |
KR100488532B1 (en) * | 2003-07-08 | 2005-05-11 | 삼성전자주식회사 | Cooling system |
US6966192B2 (en) * | 2003-11-13 | 2005-11-22 | Carrier Corporation | Tandem compressors with discharge valve on connecting lines |
JP3984258B2 (en) * | 2004-12-14 | 2007-10-03 | 三星電子株式会社 | Air conditioner |
JP2006200820A (en) * | 2005-01-20 | 2006-08-03 | Sanyo Electric Co Ltd | Refrigerated vehicle loading photovoltaic power generation device |
CN1908441A (en) * | 2005-08-02 | 2007-02-07 | 上海日立电器有限公司 | Capacity controlled compressor |
US7814758B2 (en) * | 2006-04-03 | 2010-10-19 | Computer Process Controls, Inc. | Refrigeration system controller and method |
-
2009
- 2009-09-16 US US13/061,576 patent/US20110162396A1/en not_active Abandoned
- 2009-09-16 CN CN2009801381597A patent/CN102165274A/en active Pending
- 2009-09-16 JP JP2011529113A patent/JP2012504221A/en active Pending
- 2009-09-16 EP EP09816707.5A patent/EP2331887A4/en not_active Withdrawn
- 2009-09-16 WO PCT/US2009/057068 patent/WO2010036540A1/en active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2154136A (en) * | 1936-03-31 | 1939-04-11 | Carrier Corp | Fluid circulation system |
JPS5485455A (en) * | 1977-12-21 | 1979-07-07 | Mitsubishi Electric Corp | Refrigerating system |
US5570585A (en) * | 1994-10-03 | 1996-11-05 | Vaynberg; Mikhail | Universal cooling system automatically configured to operate in compound or single compressor mode |
US5768901A (en) * | 1996-12-02 | 1998-06-23 | Carrier Corporation | Refrigerating system employing a compressor for single or multi-stage operation with capacity control |
JP2003202161A (en) * | 2002-01-10 | 2003-07-18 | Hitachi Ltd | Freezing air conditioning device |
US20080011014A1 (en) * | 2005-02-17 | 2008-01-17 | Bitzer Kuhlmaschinenbau Gmbh | Refrigeration System |
US20080110200A1 (en) * | 2006-10-17 | 2008-05-15 | Bitzer Kuehlmaschinenbau Gmbh | Refrigerating Plant |
Non-Patent Citations (1)
Title |
---|
See also references of WO2010036540A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2010036540A1 (en) | 2010-04-01 |
CN102165274A (en) | 2011-08-24 |
JP2012504221A (en) | 2012-02-16 |
US20110162396A1 (en) | 2011-07-07 |
EP2331887A4 (en) | 2013-04-24 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20110315 |
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AK | Designated contracting states |
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AX | Request for extension of the european patent |
Extension state: AL BA RS |
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DAX | Request for extension of the european patent (deleted) | ||
A4 | Supplementary search report drawn up and despatched |
Effective date: 20130327 |
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RIC1 | Information provided on ipc code assigned before grant |
Ipc: F25B 1/10 20060101AFI20130321BHEP Ipc: F25B 9/00 20060101ALI20130321BHEP |
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17Q | First examination report despatched |
Effective date: 20170920 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20180131 |