A real-gas, restricted-flow valve model is compared with an ideal-gas, ideal-valve model for a 10-cylinder swashplate refrigeration compressor. Real gas properties of R134a are evaluated using the NIST standard reference database. A minor-loss discharge-coefficient approach is used to model the refrigerant flow rate through reed valves while the ideal-valve model requires no pressure difference to open the valve. In contrast with the ideal model, the discharge temperature, refrigerant mass flow rate and volumetric efficiency as a function of rotational speed are predicted well by including real-gas properties and flow restriction on the inlet valve. The ideal-gas model significantly overpredicts the discharge temperature and shows no dependence on rpm. Heat transfer to and from the cylinder wall during compression and expansion is found to have only a small effect on predictions of compressor performance. The valve model for the suction side has the largest influence on compressor performance predictions as a function of rpm.

将实际气体，限流阀模型与10缸斜盘制冷压缩机的理想气体，理想阀模型进行了比较。使用NIST标准参考数据库评估R134a的实际气体特性。排放损失系数较小的方法用于对通过簧片阀的制冷剂流量进行建模，而理想阀模型则不需要压力差即可打开阀。与理想模型相反，通过包括进气特性和进气阀的流量限制，可以很好地预测排放温度，制冷剂质量流量和体积效率与转速的关系。理想气体模型会严重预测排气温度，并且与转速无关。发现在压缩和膨胀过程中进出气缸壁的热量对压缩机性能的预测影响很小。吸气侧的阀门模型对压缩机性能预测的影响最大，取决于转速。