What is true regarding the compression ratio of a reciprocating compressor?

The compression ratio of a reciprocating compressor refers to the ratio of the volume of gas in the cylinder before the compression occurs to the volume of gas in the cylinder after compression. This ratio can change depending on various operating conditions such as the inlet pressure and temperature of the gas being compressed. As the load on the compressor changes or as the environmental conditions fluctuate, the actual compression ratio will vary accordingly.

Understanding that the compression ratio is not fixed helps in designing and operating systems for optimal performance, as different applications may require different compression ratios. This flexibility allows for adjustments in operational settings to ensure the compressor operates efficiently across different scenarios, aligning with the varying demands of refrigeration and air conditioning systems.