Refrigeration – Processes – Circulating external gas
Patent
1991-07-31
1992-08-18
Capossela, Ronald C.
Refrigeration
Processes
Circulating external gas
60 3912, 62 37, 62 40, 364501, F25J 302
Patent
active
051395487
ABSTRACT:
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.
REFERENCES:
patent: 3742721 (1973-07-01), Bourguet et al.
patent: 4457768 (1984-07-01), Bellinger
patent: 4498916 (1985-02-01), Jensen
patent: 4734114 (1988-03-01), Tasaka et al.
patent: 4746407 (1988-05-01), Olsen
patent: 4809154 (1989-02-01), Newton
Bill G. Tompkins, LNG Plant Computer System: a Conceptual Philosophy. pp. 56-60.
Kinard Glenn E.
Liu Yu-Nan
Zagnoli David A.
Air Products and Chemicals Inc.
Capossela Ronald C.
Fernbacher John M.
Marsh William F.
Simmons James C.
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