Research on Semi-empirical Calculation Model for Characteristics of Rotary Compressor
In order to predict the performance parameters of fixed speed and variable frequency rotary compressors quickly and accurately,the efficiency and refrigerant physical parameters of rotary compressors under different working conditions were studied based on the physical meaning of volumetric efficiency and efficiency perfection of compressors.A semi-empirical calculation model of refrigerating capacity Q,power P and mass flow FM of rotary compressors with fixed speed and variable frequency in the whole operating range was established.The results show that the fitting deviations of the constant speed semi-empirical model for cooling capacity,power and mass flow rate are within±1.5%,and the fitting deviations of the variable frequency semi-empirical model for cooling capacity and mass flow rate are within±3%,and the fitting deviation for power is within±5%.Because there are only 3-4 constant coefficients in the semi-empirical calculation model,the analysis of the number of fitting conditions of the inverter compressor shows that 5 groups of data can predict the deviation of the performance parameters within±6%,and 18 groups of data can achieve good fitting accuracy,which can greatly reduce the experimental conditions and improve the calculation efficiency.
万方数据
维普
