三元工质吸收式制冷系统的性能模拟与优化  

The Simulation and Optimization of Ammonia-water-salt Ternary Absorption Refrigeration System

作　　者：王思宇 李舒宏[1] 徐梦凯 杜垲[1] WANG Si-Yu;LI Shu-Hong;XU Meng-Kai;DU Kai(School of Energy and Environment,Southeast University,Nanjing 210096,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》2020年第4期809-815,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：为了分析加入溴化锂与硝酸锂等物质后对三元工质氨吸收式制冷系统性能的影响,本文建立了氨-水二元、氨-水-溴化锂和氨-水-硝酸锂两种三元工质吸收式制冷系统模型并模拟其不同盐浓度下的运行特性,结果表明,在相同工况下,三元工质吸收式制冷系统的COP高于传统氨-水二元系统。同时为解决添加盐后吸收终了氨含量降低的问题,建立了新型含电渗析分离的三元工质吸收式制冷系统并进行模拟,氨-水-溴化锂吸收式制冷系统增加电渗析装置后,COP提高了36.0%,氨-水-硝酸锂吸收式制冷系统增加电渗析装置后COP提高了28.1%。In order to analyze the effect of adding lithium bromide and lithium nitrate on the performance of ternary working ammonia absorption refrigeration system,ammonia-water,ammoniawater-lithium bromide and ammonia-water-lithium nitrate ternary refrigerant absorption refrigeration system models are established and simulated under different salt concentrations.The results show that under the same conditions the COP of the ternary refrigerant absorption refrigeration system is higher than that of the ammonia-water system.At the same time,it is found that the addition of salt will lead to the decrease of the ammonia content at the end of absorption.To solve this problem,a new ternary medium absorption refrigeration system with electrodialysis separation is established and simulated.After the electrodialysis device is added,the ammonia-water-lithium bromide absorption The COP of the refrigeration system was increased by 36.0%,and the COP of the ammonia-water-lithium nitrate absorption refrigeration system was increased by 28.1%.

关 键 词：氨吸收式制冷 氨-水-盐三元工质 电渗析 ASPEN PLUS 

分 类 号：TB616[一般工业技术—制冷工程]