低 GWP 制冷剂/[P_6,6,6,14] [Cl] 工质对的压缩辅助吸收式制冷循环性能分析

This study investigates the performances of five low GWP (Global Warming Potential) refrigerant/[P_6,6,6,14] [Cl] working pairs in the compression-assisted single-effect absorptiion system. The studied refrigerants include hydrocarbon (HC) R290 and R600a, hydrofluo-ro-olefin (HFO) R1234yf, R1234ze (E), and R1233zd (E). The NRTL model was utilized to correlate the vapor-liquid equilibrium data of five working pairs, and the performance improvement of the compression-assisted absorptiion system was verified against the traditional single-effect absorption system. Based on this, the effects of the generation and absorption temperatures on COP, exergy efficiency, and circulation ratio of five working pairs were analyzed. The results show that the implementation of a compressor in front of the absorber may significantly increase the COP of the system. Of the five working pairs, R290/[P_6,6,6,14] [Cl] exhibited the best performance; while R1233zd (E)/[P_6,6,6,14] [Cl] had the worst performance, and the maximum differences in the COP and exergic efficiency were 0. 277 4 and 0. 224 5, respectively. As the generation temperature increased, the COP and exergy efficiency of all working pairs had maximum values, whereas the circulation ratios decreased monotonically. As the absorption temperature increased, the COP and exergy efficiency of all working pairs decreased, whereas the circulation ratios increased.