三元工质氨吸收式制冷性能实验研究  

Experiment Research on the Performance of Ammonia Absorption RefrigerationSystem With Ternary Working Fluid

作　　者：徐梦凯 李舒宏[1] 金正浩 杜垲[1] XU Meng-Kai;LI Shu-Hong;JIN Zheng-Hao;DU Kai(School of Energy and Environment,Southeast University,Nanjing 201196,China)

机构地区：[1]东南大学能源与环境学院,南京210096

出　　处：《工程热物理学报》2021年第9期2243-2249,共7页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.51876033)。

摘　　要：通过实验研究了氨–水–溴化锂三元工质的对氨吸收式制冷系统的影响。实验测试了发生温度100~130℃,蒸发温度-16~-4℃和冷却水温度22~33℃工况下的系统性能系数,发现适用于氨吸收式制冷的最佳溴化锂浓度为15%,与氨吸收式制冷系统相比,性能系数最高提升了10%。溴化锂最为第三工质对系统的影响是整体的,使用三元工质可以降低精馏负荷与回流比,提高热能利用效率同时降低了发生压力,有利于提升性能系数;但其不利影响体现在会降低浓溶液中氨的浓度,导致系统循环倍率上升,不利于提升性能系数。合理使用氨–水–溴化锂三元工质是不增加系统复杂度提高氨吸收式制冷性能有效方式。The influence of ammonia-water-lithium bromide ternary working fluid on the ammonia absorption refrigeration was researched through experiments. Experiments were carried out when the generation temperature ranged from 100 to 130℃, evaporation temperature ranged from-16 to-4℃ and condensing temperature ranged from 22 to 33℃. The performance was increased by up to 10% and 15% is the optimum lithium bromide concentration in the working fluid on ammonia absorption refrigeration system. Lithium bromide as the third working fluid has effect on the system holistically. The rectification cooling load and reflux ratio decreased with the application of ternary working fluid, which led to higher heat usage efficiency in generator and lower generation pressure,therefore, the performance of the system was promoted. But the ammonia concentration in strong solution decreased due to the lithium bromide in working fluid, which led to higher circulation ratio and lower performance. Generally, Applying ammonia-water-lithium bromide ternary working fluid reasonable in ammonia absorption refrigeration can promote performance without increasing the complexity of the system.

关 键 词：氨吸收式制冷 氨–水–溴化锂三元工质 性能分析 实验研究 

分 类 号：TB657[一般工业技术—制冷工程]