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Formulas & Reference

Refrigeration Formula Library

Key thermal calculations for commercial refrigeration technicians and plant operators.

1. Compression Ratio

Calculates the ratio of absolute discharge pressure to absolute suction pressure. High compression ratios indicate low efficiency and overheating.

CR = (Discharge Pressure + 14.7) / (Suction Pressure + 14.7)

2. Coefficient of Performance (COP)

Evaluates compressor refrigeration output relative to electrical power input.

COP = Refrigeration Effect (kW) / Work of Compression (kW)
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