Compressor surge control

Details Compressor surge control Compressor surge control

F - Mech Eng,Light,Heat,Weapons

04

B

341/39

F04B 49/06 (2006.01) F04D 27/02 (2006.01) G05D 16/20 (2006.01)

Patent

CA 1129041

ABSTRACT OF THE DISCLOSURE A surge control system for controlling and preventing a surge condition and a method of controlling surge in a fixed or variable speed compressor or a compressor having a variable geometry which provides air to a pneumatic load. A transducer provides a signal proportional to the outlet pressure of the air from the compressor. The signal is differentiated with respect to time and if a surge condition is ensuing, the absolute value of the differentiated signal is greater than a reference. When the differentiated signal is greater than the reference, a portion of the air supplied to the load is vented to reduce the outlet pressure. A reduction in the outlet pressure alleviates the ensuing surge condition and the absolute value of the differentiated signal decreases, causing the venting valve to close.

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