What happens to compression capacity when the clearance space between the valves and piston of a reciprocating compressor is lowered?

When the clearance space between the valves and piston of a reciprocating compressor is lowered, the compression capacity actually increases. This is due to the fact that reducing clearance leads to a decrease in the volume of the space where gas can remain after the compression stroke is completed. Consequently, more refrigerant can be compressed during the next cycle, enhancing the overall capacity of the compressor.

In essence, reducing the clearance space allows the compressor to operate more efficiently by ensuring that there is less residual gas left after the compression process. The result is an increased amount of refrigerant delivered per cycle, which directly contributes to a higher compression capacity.

The statement about decreased capacity seems to stem from a misunderstanding of the role of clearance space in a reciprocating compressor. It is important to understand that proper clearance adjustments are crucial for optimizing compressor performance, as well as preventing issues like inefficiency or even potential mechanical failures if the space is reduced too much.