制冷学报Issue(1)：65-68,4.DOI:10.3969/j.issn.0253-4339.2013.01.065
几何参数对引射器及两相流引射制冷系统性能的影响
Effects of Geometric Parameter on Performance of Ejector and Two-phase Ejector Refrigeration System
摘要
Abstract
In order to increase the coefficient of performance (COP) of the refrigeration system , the expansion valve is replaced by a two-phase ejector in the two-phase ejector refrigeration cycle to recover the potential energy of the high pressure refrigerant. The performance of two-phase ejector refrigeration system with refrigerant R134a as working fluid is experimentally investigated. The effects of the throat diameter of the nozzle and the diameter of the mixing chamber on the performance of the ejector and the two-phase ejector refrigeration cycle system were analyzed. The experimental results indicate that there is an optimal combination of the nozzle throat diameter and the mixing chamber diameter to maximize the entrainment ratio under a fixed working condition. The entrainment ratio of the ejector reaches to the maximum value with the throat diameter of 2.0mm and the mixing chamber diameter of 16mm under the conditions of 3℃ evaporating temperature and 55℃ condensing temperature. Under a fixed working condition, the optimal combination of the nozzle throat diameter and the mixing chamber diameter for maximum of the entrainment ratio is not consistent with the one for maximum of the COP of the refrigeration system. This may be caused by the shocks in the ejector, which should be investigated deeply.关键词
两相流引射循环/两相流引射器/几何参数/实验Key words
two-phase ejector cycle/two-phase ejector/geometric parameter/experiment分类
通用工业技术引用本文复制引用
裴文伟,郭宪民,王善云,郭欣炜..几何参数对引射器及两相流引射制冷系统性能的影响[J].制冷学报,2013,(1):65-68,4.基金项目
国家自然科学基金(51176142)资助项目.(The project was supported by the National Natural Science Foundation of China (No.51176142).)本文受天津市应用基础及前沿技术研究计划项目(09JCZDJC24900)资助.(The project was supported by the Research Foundation for Application Fundamentals and Advanced Technology of Tianjin (No.09JCZDJC24900).) （51176142）
