采用离子液体-水工质对的GAX吸收式制冷循环性能研究  

Performance Analysis of a GAX Absorption Cycle with Ionic Liquid-water Working Pairs

作　　者：赵心蕊 徐震原[1] 王如竹[1] Zhao Xinrui;Xu Zhenyuan;Wang Ruzhu(Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai, 200240, China)

机构地区：[1]上海交通大学制冷与低温工程研究所

出　　处：《制冷学报》2019年第4期52-58,共7页Journal of Refrigeration

基　　金：国家自然科学基金(51606124)资助项目~~

摘　　要：热驱动的吸收式制冷技术是太阳能利用和工业余热回收的重要途径,其中GAX(吸收发生换热)吸收式循环具有高效、效率可随热源温度变化的特点。本文提出采用无结晶风险的离子液体工质对,并使用NRTL模型对离子液体工质对性质进行计算,并对GAX吸收式制冷循环进行性能计算。结果表明:采用1,3-二甲基咪唑磷酸二甲酯盐([DMIM][DMP]/水工质对可以使用GAX吸收式循环,且在发生温度较高的情况下COP能够达到约1.02,比相同特定工况下的单效循环COP提升27.5%,比采用溴化锂/水工质对的吸收式循环具有更加优异的性能。Heat-driven absorption refrigeration technology is an important approach for solar-energy utilization and industrial-waste heat recovery. Among them, the generation and absorption heat exchange(GAX) absorption cycle exhibits a high efficiency whose coefficient of performance(COP) can vary with the heat-source temperature. This paper proposes the use of an ionic liquid-water working pair without crystallization risk for the GAX absorption cycle. The NRTL(non-random two liquid) model is utilized to calculate the thermal physical properties of the ionic liquid-water working pair, and the performance of the GAX absorption refrigeration cycle is calculated based on the working-pair properties. The results showed that the [DMIM][DMP]/water solution can be used in the GAX absorption cycle and achieves a COP of 1.02, which is 27.5% higher than that in a single-effect cycle. In addition, the results show that the ionic liquid-water absorption cycle achieves better performance than the LiBr-water absorption cycle.

关 键 词：制冷 GAX吸收式循环 NRTL模型 离子液体 

分 类 号：TB616[一般工业技术—制冷工程] TB64