基于R124/DMAC为工质的压缩吸收式制冷系统的性能分析  

Performance study of compressive energy absorption refrigeration system based on R124/DMAC mixture

作　　者：贾炯[1] 王辉涛[1] 刘泛函[1] 葛众[2] JIA Jiong;WANG Huitao;LIU Fanhan;GE Zhong(1Faculty of Metallurgical and Energy Engineering,Kunming University of science and technology,Kunming 650032,Yunnan,China;Key Laboratory for Thermal Science and Power Engineering of MOE,Tsinghua University,Beijing100084,China)

机构地区：[1]昆明理工大学冶金与能源工程学院,云南昆明650032 [2]清华大学热科学与动力工程教育部重点实验室,北京100084

出　　处：《化工进展》2017年第7期2436-2442,共7页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金项目(51366005)

摘　　要：吸收式制冷能够利用工业余热进行制冷,但存在不能高效利用100℃以下废热的问题。本文以压缩吸收式制冷系统为研究对象,采用新型制冷工质对R124/DMAC,对不同发生压力、发生温度和冷凝温度下系统性能的变化规律进行研究,并与传统氨/水制冷系统的性能进行比较。结果表明影响系统制冷系数(COP)、?损和?效率的主要因素是发生温度和发生压力,在相同冷凝温度下,R124/DMAC制冷系统的最佳发生压力为600k Pa,最佳发生温度为75℃;而氨/水制冷系统的最佳发生压力为1100k Pa,最佳发生温度为100℃,采用新型制冷工质对能够有效地利用更低品位的热源进行制冷,同时系统的安全性更高。Absorption refrigeration can recover industrial waste heat,but cannot effectively utilizewaste heat below100℃.Aiming at the problems of high pressure and temperature in the traditionalammonia absorption refrigeration system,the performance of compressive absorption refrigerationsystem was simulated with R124/DMAC as working fluids.Operating parameters were studied bychanging operating temperatures,pressures and condensing temperatures.Operating temperature andpressure were the major factors influencing system COP,energy loss and efficiency.Compared withthe traditional ammonia absorption refrigeration system,the results showed that at the same condensingtemperature,the maximum COP of the two working fluid systems was the same.But the new systemhad a lower pressure of600kPa(ammonia system of1100kPa),a lower temperature of75℃(ammoniasystem is100℃).The irreversibility using the new refrigerant and the exergy efficiency were in areasonable range.The main factors influencing the system of COP,exergy loss and exergy efficiencywere pressure,temperature and condensing temperature.

关 键 词：压缩吸收式制冷 . 热力学 仿真 模型 

分 类 号：TK124[动力工程及工程热物理—工程热物理]