Analysis of the Performance Rating Standards of Positive Displacement Refrigerant Compressors

This presentation provides an introduction and overview of the current standards for rating positive displacement compressors.  It reviews the industry standard polynomial equation used for presenting ratings and the basis for the reference rating conditions.  It also explains the uncertainty limits associated with the standards and what they mean as they apply to a single compressor versus a batch/rack of compressors.  It explains the limitation of most compressor ratings and provides suggestions on how these ratings should be applied with zeotropic refrigerants as well as how to perform superheat corrections.