热力学熵分析法改善双级喷射制冷系统的研究  

Research on Improving the Two-stage Ejector Refrigeration System Based on the Thermodynamic Entropy Analysis Method

作　　者：许浩[1] 李香 徐昆[1] 刘进阳 谢超许 王博韬 王南 王祥 

机构地区：[1]广西大学化学化工学院广西石化资源加工与过程强化重点实验室,广西南宁530004

出　　处：《当代化工》2017年第10期2066-2072,共7页Contemporary Chemical Industry

摘　　要：利用热力学第一定律和热力学第二定律熵分析法对双级喷射制冷系统进行研究,比较了多组制冷剂在不同发生温度、蒸发温度和冷凝温度下,系统的喷射系数,性能系数及机械性能系数的变化趋势。分析了系统各部件不可逆损失的分布情况,同时分析了工作参数的变化对系统各部分熵产的影响,进而确定使系统性能系数较佳同时满足总熵产最小的运行参数,即系统工作性能最优的工况。The first law of thermodynamics and entropy analysis in the second law of thermodynamics were used to study the two-stage ejector refrigeration system. The variation trends of the entrainment ratio, the performance coefficient and the mechanical performance coefficient of the system using different several kinds of refrigerants were studied and compared at different generation temperature, evaporation temperature and condensation temperature. The irreversible loss distribution of each component in the system was analyzed, the influence of working parameters on each part of the system entropy production was also analyzed, then the best operating parameters were determined to ensure better system performance coefficient and satisfy the total entropy production minimum simultaneously.

关 键 词：双级喷射式制冷 熵分析法 不可逆性 性能优化 

分 类 号：TQ013.1[化学工程]