Compressor Selection Guide

Select the right compressor type based on capacity, temperatures, refrigerant, and application.

Total cooling capacity needed in BTU/hr.
BTU/hr
Saturated suction temperature at the evaporator coil.
deg F
Saturated condensing temperature at the condenser.
deg F
Refrigerant type affects suction/discharge pressures and compression ratio.
Application type determines temperature ranges and compressor suitability.

Results

Compression Ratio:
Ratio of discharge to suction pressure. Above 8:1 typically requires two-stage compression.
-:1
Staging Recommendation:
Single stage for CR less than 8:1. Two-stage for higher ratios to improve efficiency and reduce discharge temp.
-
Recommended Type:
Compressor type recommendation based on capacity and application.
-
Est. Displacement:
Estimated compressor displacement volume needed.
-CFM
Est. Motor HP:
Estimated compressor motor horsepower required.
-HP
Reference: ASHRAE Refrigeration Handbook - Compressor Selection. Copeland, Bitzer, Carrier application guides.