喷射制冷系统工质性能综合比较

Comprehensive comparison of refrigerants in ejector refrigerant system

中文关键词: 喷射制冷  工质比较  环境影响  COP  循环泵功

英文关键词: ejector refrigeration, refrigerant comparison, environment impact, COP, pump power

中文摘要:

      在比较制冷工质的优劣时，不仅应考虑系统COP，还应考虑循环泵的耗功及压力容器中的压力水平。 根据饱和蒸气压将八种环境友好型制冷工质分为四组(R141b & R123, R600a & R142b, R134a & R152a, R290 & R717)，分组的依据是每组制冷工质的饱和蒸气压曲线非常相近。比较结果表明，R123和 R141b、R142b 和R600a的热力性能都非常相近，但R123和R600a对环境的影响更小；R152a相比R134a，具有更低的压力和循环泵功、更小的环境影响，但性能系数却更大。

英文摘要:

      : In comparison of refrigerant performance, not only system COP but also system pressure levels and pump power should be taken into account. Eight refrigerants were divided into four pairs (R123 and R141b, R142b and R600a, R152a and R134a, R717 and R290). The refrigerant saturation pressures in the four pairs are nearly identical. The comparison results indicate that the thermodynamic performance of refrigerants pairs R123 and R141b, R142b and R600a are similar, but R123 and R600a have much lower harmful impact on the environment than the others; Compared with R134a, R152a has lower saturation pressure, lower pump power and much less GWP , but higher system COP.