EDITOR’S NOTE: This article is the second of a two-part series in response to the question: “Should I choose CO2 (R-744) for my refrigeration system?” It was prepared by engineers with M&M Refrigeration (www.mmrefrigeration.com) of Federalsburg, Maryland. Click here for Part 1.
When comparing the performance of a high pressure CO2 reciprocating compressor versus the high pressure CO2 rotary screw compressor, the efficiency (BHP/TR) of the reciprocating compressor is considerably better.