摘要
使用MH-59方程编制R1234yf的热力性质计算程序。在汽车空调制冷工况下,对比R1234yf和R134a的压力比、排气温度、单位质量压缩功、单位质量制冷量、单位质量冷凝负荷、COP、热力完善度、单位体积制冷量及压缩机吸气比容,得出它们随蒸发温度的变化情况。理论循环性能分析表明:R1234yf作为汽车空调制冷剂,在不改变制冷系统设备的前提下可以直接替代R134a,并且可以降低压缩机排气温度。
The program to calculate the thermodynamic properties of R1234 yf is compiled with MH-59 equation.Under the refrigeration condition of vehicle air-conditioning,the pressure ratio,discharge temperature,compression work per mass,cooling capacity per mass,condensing load per mass,COP,thermodynamic perfect degree,cooling capacity per volume and specific volume of inspiration are compared respectively between R1234 yf and R134 a to study their variations along with the evaporating temperature.It is shown that R1234 yf can take the place of R134 a directly without changing the equipments of refrigerating system and the discharge temperature of compressor is decreased.
出处
《制冷与空调》
2016年第10期33-37,41,共6页
Refrigeration and Air-Conditioning
