[특허]Gas liquefaction process control system

[미국특허] Gas liquefaction process control system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F25J-003/02
출원번호	US-0739077 (1991-07-31)
발명자 / 주소	Liu Yu-Nan (Emmaus PA) Kinard Glenn E. (Allentown PA) Zagnoli David A. (Macungie PA)
출원인 / 주소	Air Products and Chemicals, Inc. (Allentown PA 02)
인용정보	피인용 횟수 : 28 인용 특허 : 0

초록 ▼

A method for controlling the operation of a liquefied natural gas (LNG) process which utilizes gas turbine-driven refrigeration compressors is disclosed. A feedforward control system compensates for the effects of changes in ambient air temperature on the plant operating efficiency by periodically predicting a new temperature and resetting the set points of key feedback controllers in anticipation of this new temperature, thereby optimizing the operation of the plant and minimizing the specific fuel consumption at a given LNG production rate.

대표청구항 ▼

A method of operating a gas liquefaction process wherein a feed gas is liquefied by indirect heat exchange with at least one refrigerant provided by a refrigeration system which utilizes at least one gas turbine-driven compressor, wherein said refrigeration system utilizes at least one feedback control system, said method comprising: (a) determining the ambient air temperature at the location of said liquefaction process at a given time; (b) determining the optimum operating conditions of said liquefaction process including the set point of said feedback control system at said given time, and operating said liquefaction process at said optimum operating conditions including said set point, (c) predicting said ambient air temperature at a future time; (d) determining new optimum operating conditions of said liquefaction process including a new set point of said feedback control system at said future time, and changing said optimum operating conditions to said new optimum operating conditions including changing said set point to said new set point; (e) operating said liquefaction process at said new optimum operating conditions including said new set point; and (f) repeating steps (a), (c), (d), and (e) at a time interval defined by the time difference between said given time and said future time; thereby providing a feedforward control method for the operation of said liquefaction process which anticipates changes in ambient air temperature in order to maintain optimum operating conditions for said process.

이 특허를 인용한 특허 (28) 인용/피인용 타임라인 분석

Jones, Jr.,Richard; Ward,Patrick B., All electric LNG system and process.
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Coward, Brian A., Apparatus and method for optimizing a natural gas liquefaction train having a nitrogen cooling loop.
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Belanger, Paul William; Esposito, William R.; Gajewski, Thomas Edward, Apparatus for controlling the operation of a cryogenic liquefier.
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Price Brian C. (Overland Park KS), Closed loop single mixed refrigerant process.
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Kountz, Kenneth J.; Bishop, Patrick M., Control method for mixed refrigerant based natural gas liquefier.
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Sicinski, Michael Andrew; Johnston, Brian Keith; Trautmann, Scott Robert; Roberts, Mark Julian, Controlling liquefaction of natural gas.
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Martinez, Bobby D.; Thakkar, Shrikant R.; Hahn, Paul R.; Baudat, Ned P.; Qualls, Wesley R., Driver and compressor system for natural gas liquefaction.
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Junod, Larry Allen, Gas turbine engine and integrated heat exchange system.
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Le Bot, Patrick, Integrated air separation process and apparatus.
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Bachus, Robert; Quigley, Marcus, Landfill gas wellhead monitoring and control system.
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Mirsky Saul ; Zilberman Boris, Method and apparatus for maximizing the productivity of a natural gas liquids production plant.
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Mandler Jorge Anibal ; Brochu Philip Albert ; Hamilton ; Jr. James Robert, Method and apparatus for regulatory control of production and temperature in a mixed refrigerant liquefied natural gas.
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Cullen David M.,GBX ; Kimmel Hans E., Method to optimize thermodynamic expansion in gas liquefaction processes.
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Koganezawa, Tomomi; Araki, Hidefumi; Higuchi, Shinichi; Horiuchi, Yasuhiro; Horitsugi, Mutsumi, Natural gas liquefaction plant and motive power supply equipment for same.
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Fanning Robert A. ; Ryberg Brett L.,JPX ; Smith Bruce K. ; Phan Luan D., Process and system for liquefying natural gas.
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Lin,Pei Jung; Silve,Roland Pierre; Vink,Kornelis Jan; Hupkes, deceased,Willem, Process of Liquefying a gaseous, methane-rich feed to obtain liquefied natural gas.
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Jones, Jr.,Richard; Ward,Patrick B., Reduced carbon dioxide emission system and method for providing power for refrigerant compression and electrical power for a light hydrocarbon gas liquefaction process using cooled air injection to t.
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Johnson, Brian Keith; Krishnamurthy, Gowri; Roberts, Mark Julian, Refrigerant recovery in natural gas liquefaction processes.
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Scherer, John; Tator, Ralph, Refrigeration system controlled by refrigerant quality within evaporator.
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Scherer, John S., Refrigeration system with separate feedstreams to multiple evaporator zones.
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Fischer-Calderon, Ernesto, Self-refrigerated LNG process.
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Eaton, Anthony P., Semi-closed loop LNG process.
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Foege, Aaron, System for converting gaseous fuel into liquid fuel.
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Severinsky, Alexander J., Systems, methods, and compositions for production of synthetic hydrocarbon compounds.
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Severinsky, Alexander J., Systems, methods, and compositions for production of synthetic hydrocarbon compounds.
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Severinsky, Alexander J., Systems, methods, and compositions for production of synthetic hydrocarbon compounds.
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Severinsky, Alexander J., Systems, methods, and compositions for production of synthetic hydrocarbon compounds.
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Severinsky, Alexander J., Systems, methods, and compositions for production of synthetic hydrocarbon compounds.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Gas liquefaction process control system 원문보기