System performance of new environment-friendly refrigerants
1. College of Aerospace Engineering, Nanjing University of Aeronautics ＆ Astronautics, Nanjing, Jiangsu 210016, China; 2. Key Laboratory of Aircraft Environment Control and Life Support, MIIT, Nanjing University of Aeronautics ＆ Astronautics, Nanjing, Jiangsu 210016, China
Abstract： To investigate the effects of system parameters and regenerator cycle on the performance of new refrigerants of R1234yf, R1234ze, R152a, R448A, R290 and R600，two simulation models with and without regenerator cycle were established based on VapCyc software，and the models were verified by experiments. With the six refrigerants, the effects of overheating temperature, ambient temperature, compressor speed, air volume of condenser side and evaporator side on system refrigeration capacity and COP variation were simulated. The results show that the refrigeration capacity is decreased with the increasing of overheating temperature and external ambient temperature, while the refrigeration capacity is increased with the increasing of compressor speed, air volume on the condenser side and air volume on the evaporator side. The COP is decreased with the increasing of overheating temperature, ambient temperature and air volume on the condenser side,while the COP is increased with the increasing of compressor speed and air volume on the evaporator side. Under the same operating conditions, the decreasing sequence of refrigerating capacity is from R448A， R290， R152a ，R1234yf， R1234ze to R600a, and the decreasing sequence of COP is from R600a， R1234ze ， R152a ， R1234yf ， R290 to R448A. For the above six refrigerant systems, the regenerator cycle is beneficial to the system performance. The cooling capacity and the COP of the system are respectively increased by 10% and 6%, and it is the most advantageous to improve the performance of R600a system.
2019, Vol. 40 
