Method and system for energy optimization of a centrifugal compressor

摘要

The present invention provides compressor control method (20) and system (1). The proposed method (20) comprises providing variable volumetric flow sizing of fluid through the compressor (2) at multiple operating points of the compressor (2), by a combination of adjustment of diffuser (7) geometry and adjustment of inlet guide vane (7) geometry of the compressor. For an operating point, a compressor head is determined based on a process input (21a) at said operating point. The compressor efficiency is controlled by determining a compressor speed at said operating point, using as input the compressor head and the volumetric flow sizing defined by the diffuser geometry and the inlet guide vane geometry at said operating point.