蒸汽压缩/喷射制冷系统喷射器设计及节能分析

蒸汽压缩/喷射制冷系统是一种有效的节能系统,可以减少节流膨胀损失,降低压缩机压力比,提高制冷系统效率。选择5种计算工况对蒸汽压缩/喷射制冷系统进行计算,研究喷射器结构与蒸发温度和冷凝温度的变化规律,并与普通蒸汽压缩系统对比,从制冷量、压缩机耗功、性能系数三个角度分析新系统的节能效果。计算结果表明蒸汽压缩/喷射制冷系统在低温工况条件下节能效果最优,制冷量最大可提高29%,压缩机耗功最大可降低65%,COP值最大可提高63%。

Ejector Design and Energy-saving Analysis of Vapor Compression/Ejection Refrigeration System

The vapor compression/ejection refrigeration system (VCERS) is an energy-saving system which can reduce the loss of throttling expansion and the pressure ratio of compressor to improve the efficiency of the refrigeration system. The structure of ejector related with the evaporating and condensing temperature is researched and the energy-saving effects are compared with the compression refrigeration system from the refrigerating capacity, the compressor work and COP on five working conditions. The results indicate that the VCERS is more suitable for the low temperature working condition, the maximum increase of refrigerating capacity is about 29%, the maximum decrease of the compressor work is about 65% and the maximum increase of COP is about 63%.