There are many combinations of the piston stroke and the cylinder bore that yield a given suction volume in a reciprocating compressor.This study presents an optimal combination of the piston stroke and the cylinder bore,which maximizes the mechanical efficiency of a compact single-cylinder reciprocating refrigerant compressor.Theoretical development of the equation of motion of the rotating crankshaft was undertaken. Subsequently computer calculations were carried out to identify the mechanical efficiency for a variety of combinations of the major parameters,thereby permitting identification of the optimal combination for maximum mechanical efficiency.The identified optimal combination was then subjected to a parametric study with a variety of friction coefficients.The values of friction coefficients had no effect upon the optimal combination.
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