METHOD AND INSTALLATION FOR CONTROLLING AT LEAST ONE CRYOGENIC CENTRIFUGAL COMPRESSOR, COMPRESSION LINE

摘要

The inventive method consists in: selecting a pre-determined curve (C'OPT), which can be represented in the form of a first parameter (NU) that is representative of the speed of rotation of a compressor, according to a second parameter (X) that is representative of the mass flow of said compressor; regulating the speed of rotation of the downstream compressor according to the relative values of the instantaneous suction pressure of the upstream compressor and of a variable set pressure; and regulating the variable set pressure according to the instantaneous value (NU4(inst)), for the downstream compressor, of the parameter that is representative of the speed of rotation and the theoretical value (NU4(th)) of said first parameter, which is located on the pre-determined curve (COPT), which corresponds to the instantaneous value (X4(inst)) of the second parameter representative of the mass flow.