Theoretical and experimental investigation on working process of crew refrigeration compressor with R134a

To acquaint the working process of screw refrigeration compressor with R134a, a thermodynamic model for screw refrigeration compressor is proposed, in which the effects, such as internal leakage through five paths, gas-oil heat transfer, oil injection and part load, are taken into account. The experimental recording of p-V indicator diagram and the measurement of screw refrigeration compressor performance are carried out to confirm the model. The theoretical calculation results coincide with the measured data. The proposed model provides a basis for the performance prediction.