Method and installation for controlling at least one...

Details Method and installation for controlling at least one... Method and installation for controlling at least one...

2007-06-26

2007-06-26

Norman, Marc (Department: 3744)

Refrigeration

Cryogenic treatment of gas or gas mixture

Automatic control

C062S228300, C062S228400

Reexamination Certificate

active

10515510

ABSTRACT:
Methods and apparatuses for controlling systems of cryogenic centrifugal compressors. A predetermined curve in the form of a first parameter as a function of a second parameter is selected. The first parameter represents the rotational speed of a compressor, and the second parameter represents the mass for rate of that compressor. The speed of rotation of a downstream compressor is regulated according to the value of the suction pressure of an upstream compressor and a variable set pressure. The variable set pressure is regulated according to both actual value of the first parameter for a downstream compressor, and the theoretical value of this parameter. The theoretical value is determined from a predetermine curve using the value of the second parameter.

REFERENCES:
patent: 5265426 (1993-11-01), Gistau-Baguer
patent: 5499505 (1996-03-01), Gistau-Baguer
patent: 5941095 (1999-08-01), Gistau-Baguer
patent: 6755620 (2004-06-01), Nakamura et al.
patent: 2 760 074 (1993-01-01), None
patent: 2 679 635 (1998-08-01), None
International Search Report for PCT/FR 03/01501.

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