太阳能喷射压缩复合制冷系统的实验及仿真
2016-05-31郑慧凡陈银龙田国记王兴豫范晓伟梁耀华
郑慧凡 陈银龙 田国记 王兴豫 范晓伟 梁耀华



摘要:建立了太阳能喷射压缩复合制冷系统的实验研究平台,基于EES软件程序进行系统稳态仿真,实验验证了仿真模拟程序的正确性,分析了不同发生温度、中间温度对系统性能的影响。研究表明,在中间温度和冷凝温度不变的情况下,随着发生温度的升高,总功率先降低后升高,系统EER先升高后降低;同时,系统COP呈先逐渐升高而后降低的趋势。在研究范围内,最优发生温度工作区域为78~80 ℃,此时,系统的总耗功量最小;最优中间温度工作区域为7~10 ℃,此时,系统制冷量达2 245 W,EER最高为3.39。
关键词:喷射压缩复合制冷;仿真;最优中间温度;最优发生温度
中图分类号:TB65
文献标志码:A 文章编号:1674-4764(2016)02-0084-06
Abstract:An experiment and simnlation of solar ejector-compression combined refrigeration system were conduced, and the results of the simulation model was verified with experimental data. The influence of the generator temperature and middle-temperature on solar ejector-compression combined refrigeration system has been studied. Research shows that:
with the increasing of generator temperature,it is found that the COP and the EER increase first and then decline, and the power consumption decreases first and then increases at the same time. In addition, it was seen that there exists the optimal generator temperature and the optimal middle-temperature,and the optimal generator temperature and middle-temperature are between 78 and 80 ℃ ,7 and 10 ℃ over the range of research conditions respectively. The minimum total power consumption can be obtained, when the optimal generator temperature are from
78 to 80 ℃,and the maximun cooling capacity and EER can reach to
2 245 W,0.34 respectively when the optimal middle-temperature and from 7 to 10 ℃.
Keywords:ejector-compression combined refrigeration system; simulation; the optimal middle-temperature; the optimal generator temperature
随着环境污染和能源危机的日益加剧,太阳能、风能等清洁能源越来越受到人们的重视,在太阳能利用技术中,太阳能喷射制冷系统以其结构简单、运动部件少等优点在制冷领域应用越来越广[1]。近年来,许多学者对其特性进行了研究,Alexis等[2]结合雅典地区的气候特点,分析了以R134a为制冷剂的太阳能喷射制冷系统的运行特性;Ersoy等[3]以R123为制冷剂,研究了太阳能喷射制冷系统在土耳其南部诸城市的逐时运行性能;Clemens等[4]以水作为制冷剂,对太阳能喷射制冷系统进行了实验研究,实验测试了当太阳辐射量逐时变化时,系统的制冷量、COP等参数随蒸发温度和冷凝温度的变化;Bogdan等[5-6]对太阳能喷射制冷系统的蓄能性能进行了数值计算和实验研究,分析了集热面积、集热效率、蓄能量等参数的关系,研究表明:蓄冷装置的设计大大提高了系统的工作稳定性和房间的热舒适度;……
