GB2465136B - Method and apparatus for controlling a refrigerant compressor, and use thereof in a method of cooling a hydrocarbon stream - Google Patents

Method and apparatus for controlling a refrigerant compressor, and use thereof in a method of cooling a hydrocarbon stream

Info

Publication number
GB2465136B
GB2465136B GB1004808.0A GB201004808A GB2465136B GB 2465136 B GB2465136 B GB 2465136B GB 201004808 A GB201004808 A GB 201004808A GB 2465136 B GB2465136 B GB 2465136B
Authority
GB
United Kingdom
Prior art keywords
cooling
controlling
hydrocarbon stream
refrigerant compressor
refrigerant
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.)
Expired - Fee Related
Application number
GB1004808.0A
Other versions
GB2465136A (en
GB201004808D0 (en
Inventor
Sander Kaart
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.)
Shell Internationale Research Maatschappij BV
Original Assignee
Shell Internationale Research Maatschappij BV
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 Shell Internationale Research Maatschappij BV filed Critical Shell Internationale Research Maatschappij BV
Publication of GB201004808D0 publication Critical patent/GB201004808D0/en
Publication of GB2465136A publication Critical patent/GB2465136A/en
Application granted granted Critical
Publication of GB2465136B publication Critical patent/GB2465136B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/02Surge control
    • F04D27/0207Surge control by bleeding, bypassing or recycling fluids
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B1/00Compression machines, plants or systems with non-reversible cycle
    • F25B1/04Compression machines, plants or systems with non-reversible cycle with compressor of rotary type
    • F25B1/053Compression machines, plants or systems with non-reversible cycle with compressor of rotary type of turbine type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00Arrangement or mounting of control or safety devices
    • F25B49/02Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/022Compressor control arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/0002Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0022Hydrocarbons, e.g. natural gas
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/003Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
    • F25J1/0047Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle
    • F25J1/0052Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle by vaporising a liquid refrigerant stream
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/006Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the refrigerant fluid used
    • F25J1/008Hydrocarbons
    • F25J1/0087Propane; Propylene
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0244Operation; Control and regulation; Instrumentation
    • F25J1/0245Different modes, i.e. 'runs', of operation; Process control
    • F25J1/0249Controlling refrigerant inventory, i.e. composition or quantity
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0279Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc.
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0279Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc.
    • F25J1/0294Multiple compressor casings/strings in parallel, e.g. split arrangement
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0279Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc.
    • F25J1/0298Safety aspects and control of the refrigerant compression system, e.g. anti-surge control
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00General 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
    • F25B2400/13Economisers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00Control issues
    • F25B2600/02Compressor control
    • F25B2600/026Compressor control by controlling unloaders
    • F25B2600/0261Compressor control by controlling unloaders external to the compressor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2245/00Processes or apparatus involving steps for recycling of process streams
    • F25J2245/02Recycle of a stream in general, e.g. a by-pass stream
GB1004808.0A 2007-10-17 2008-10-15 Method and apparatus for controlling a refrigerant compressor, and use thereof in a method of cooling a hydrocarbon stream Expired - Fee Related GB2465136B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP07118711 2007-10-17
PCT/EP2008/063827 WO2009050175A1 (en) 2007-10-17 2008-10-15 Method and apparatus for controlling a refrigerant compressor, and use thereof in a method of cooling a hydrocarbon stream

Publications (3)

Publication Number Publication Date
GB201004808D0 GB201004808D0 (en) 2010-05-05
GB2465136A GB2465136A (en) 2010-05-12
GB2465136B true GB2465136B (en) 2012-05-02

Family

ID=39345376

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1004808.0A Expired - Fee Related GB2465136B (en) 2007-10-17 2008-10-15 Method and apparatus for controlling a refrigerant compressor, and use thereof in a method of cooling a hydrocarbon stream

Country Status (7)

Country Link
US (1) US20110277498A1 (en)
AU (1) AU2008313765B2 (en)
GB (1) GB2465136B (en)
PE (1) PE20091140A1 (en)
RU (1) RU2490565C2 (en)
TW (1) TW200933106A (en)
WO (1) WO2009050175A1 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110214839A1 (en) * 2008-11-10 2011-09-08 Jose Lourenco Method to increase gas mass flow injection rates to gas storage caverns using lng
US9341400B2 (en) * 2010-08-06 2016-05-17 Braun Intertec Geothermal, Llc Mobile hydro geothermal testing systems and methods
FR2965312B1 (en) * 2010-09-23 2016-12-23 Air Liquide METHOD OF COMPRESSING MULTIPLE GAS FLOWS ON A SINGLE COMPRESSOR
CN103062989B (en) * 2013-01-24 2015-03-11 成都深冷液化设备股份有限公司 Natural gas liquefaction device and process for mixed refrigeration
AU2013376868B2 (en) 2013-01-31 2017-03-30 Danfoss A/S Centrifugal compressor with extended operating range
US20160102671A1 (en) * 2013-05-29 2016-04-14 Siemens Aktiengesellschaft Method for operating a compressor, and arrangement with a compressor
US9382911B2 (en) 2013-11-14 2016-07-05 Danfoss A/S Two-stage centrifugal compressor with extended range and capacity control features
US9746209B2 (en) 2014-03-14 2017-08-29 Hussman Corporation Modular low charge hydrocarbon refrigeration system and method of operation
EP2957620A1 (en) * 2014-06-17 2015-12-23 Shell International Research Maatschappij B.V. Method and system for producing a pressurized and at least partially condensed mixture of hydrocarbons
EP3280892A4 (en) * 2015-04-07 2018-03-21 Conoco Phillips Company Quench system for a refrigeration cycle of a liquefied natural gas facility and method of quenching
ITUB20152030A1 (en) * 2015-07-09 2017-01-09 Nuovo Pignone Tecnologie Srl COMPRESSOR SYSTEM WITH A COOLING ARRANGEMENT BETWEEN THE ANTI-PUMPING VALVE AND THE COMPRESSOR SUCTION SIDE, AND ITS METHOD
CN109072930B (en) 2016-02-04 2021-08-13 丹佛斯公司 Centrifugal compressor and method of operating a centrifugal compressor
US10443932B2 (en) * 2016-05-31 2019-10-15 Linde Aktiengesellschaft Refrigerant vent rectifier and efficiency booster

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3527059A (en) * 1968-12-26 1970-09-08 Phillips Petroleum Co Method of controlling parallel-operating refrigeration compressors
DE2457262A1 (en) * 1974-12-04 1976-06-10 Linde Ag Condensation of evaporated liquefied natural gas - convertible to petroleum gases by driving refrigerant turbo-compressor stages separately
US20050126219A1 (en) * 2003-12-10 2005-06-16 Petrowski Joseph M. Refrigeration compression system with multiple inlet streams

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4888957A (en) * 1985-09-18 1989-12-26 Rheem Manufacturing Company System and method for refrigeration and heating
SU1359603A1 (en) * 1985-12-25 1987-12-15 Всесоюзный научно-исследовательский институт гелиевой техники Method of controlling cryogenic unit modes of operation
US5007245A (en) * 1989-09-01 1991-04-16 Sundstrand Corporation Vapor cycle system with multiple evaporator load control and superheat control
US5058390A (en) * 1990-05-25 1991-10-22 Sundstrand Corporation Aircraft vapor cycle cooling system with two speed control of a condenser fan and method of operation
US5109676A (en) * 1990-07-10 1992-05-05 Sundstrand Corporation Vapor cycle system evaporator control
US5651263A (en) * 1993-10-28 1997-07-29 Hitachi, Ltd. Refrigeration cycle and method of controlling the same
US5791160A (en) * 1997-07-24 1998-08-11 Air Products And Chemicals, Inc. Method and apparatus for regulatory control of production and temperature in a mixed refrigerant liquefied natural gas facility
US5946925A (en) * 1998-04-15 1999-09-07 Williams; Donald C. Self-contained refrigeration system and a method of high temperature operation thereof
US6332336B1 (en) * 1999-02-26 2001-12-25 Compressor Controls Corporation Method and apparatus for maximizing the productivity of a natural gas liquids production plant
US6394764B1 (en) * 2000-03-30 2002-05-28 Dresser-Rand Company Gas compression system and method utilizing gas seal control
US7069733B2 (en) * 2003-07-30 2006-07-04 Air Products And Chemicals, Inc. Utilization of bogdown of single-shaft gas turbines to minimize relief flows in baseload LNG plants
US20070204649A1 (en) * 2006-03-06 2007-09-06 Sander Kaart Refrigerant circuit
US8141381B2 (en) * 2006-03-27 2012-03-27 Mayekawa Mfg. Co., Ltd. Vapor compression refrigerating cycle, control method thereof, and refrigerating apparatus to which the cycle and the control method are applied
US20070240870A1 (en) * 2006-04-18 2007-10-18 Daytona Control Co., Ltd. Temperature control apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3527059A (en) * 1968-12-26 1970-09-08 Phillips Petroleum Co Method of controlling parallel-operating refrigeration compressors
DE2457262A1 (en) * 1974-12-04 1976-06-10 Linde Ag Condensation of evaporated liquefied natural gas - convertible to petroleum gases by driving refrigerant turbo-compressor stages separately
US20050126219A1 (en) * 2003-12-10 2005-06-16 Petrowski Joseph M. Refrigeration compression system with multiple inlet streams

Also Published As

Publication number Publication date
GB2465136A (en) 2010-05-12
RU2010119502A (en) 2011-11-27
TW200933106A (en) 2009-08-01
US20110277498A1 (en) 2011-11-17
AU2008313765B2 (en) 2011-04-28
AU2008313765A1 (en) 2009-04-23
PE20091140A1 (en) 2009-08-26
WO2009050175A1 (en) 2009-04-23
GB201004808D0 (en) 2010-05-05
RU2490565C2 (en) 2013-08-20

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20151015