MODELING OF A RECIPROCATING COMPRESSOR FOR TRANSCRITICAL CO2 HEAT PUMPS
This paper presents the thermodynamic modeling of a reciprocating compressor for CO2 refrigeration cycle. Based on the mass conservation, energy conservation and momentum’s law, the gas flow through the suction/discharge ports, gas leakage and the dynamics of the self-acting valves were considered. With this model, the thermodynamic parameters such as the pressure and temperature in the compressor cylinder were calculated, and the flow rate as well as the power consumption was predicted, from which the cooling capacity and coefficient of performance (COP) were obtained. With the indication diagram and curves for valve dynamics focused on, the simulation results were analyzed. The CO2 property and the influence of the superheat and heat transfer during the compression process on the compressor performance were also discussed. With this model, a single stage reciprocating CO2 compressor with two cylinders was developed.
CO2 refrigeration reciprocating compressor thermodynamic model self-acting valve
Yuan MA Yanan GAN Xueyuan PENG Ziwen XING
Institute of Compressors, School of Energy and Power Engineering,Xian Jiaotong University, Xi’an, 710049, P.R. China
国际会议
The 22nd International Congress of Refrigeration(第22届国际制冷大会)
北京
英文
2007-08-21（万方平台首次上网日期，不代表论文的发表时间）