In order to shed light on how degree of suction gas superheat affects rotary compressor(R22) performances

elaborate experiments were conducted by means of secondary fluid calorimeter test. The results show that

while both of suction and discharge pressures are fixed

mass flowrare can be corrected only by suction gas density when the degree of suction gas superheat is positive

whereas the volume efficiency decline should also be taken into account when the degree of suction gas superheat is negative; and the input power has nothing to do with the degree of suction gas superheat. The above conclusions will help to amend the degree of suction gas superheat in 10-coefficients performance model of rotary compressor.