How to calculate the compression ratio
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Coke oven gas compressor – four-row, three-stage symmetrically balanced reciprocating piston compressor
The compression ratio for each stage is the ratio of the absolute outlet pressure to the absolute inlet pressure. Σ=P2/p1; for multi-stage geometric compression, P2=P1×Σk ； Where, P1 is the inlet pressure, P2 is the outlet pressure, Σ is the compression ratio, and K is the number of stages.