Compressor control method using a variable geometry dependent pressure coefficient to set the speed, and associated device.

摘要

The present invention provides compressor control method and system. The proposed method comprises providing variable aerodynamic sizing of fluid flow through a compressor (2) at multiple operating points of the compressor (2). A head is determined (23) for an operating point, based on a process input (31) at that operating point. Further, for said operating point, a control pressure number is determined (24) as a function aerodynamic flow sizing at said operating point. An operating speed setpoint is determined (25) based on the determined head and control pressure number.