化工学报2016，Vol.67Issue(z2)：107-112,6.DOI:10.11949/j.issn.0438-1157.20161422
R23/R134a 一级分凝和二级分凝自复叠喷射制冷循环性能理论分析
Performance of R23/R134a auto-cascade refrigeration cycle with one-step dephlegmation and two-step dephlegmation
摘要
Abstract
Theoretical analyses on auto-cascade ejector refrigeration cycle with one-step dephlegmation and two-step dephlegmation were performed to discuss the influence of mixed refrigerant composition, condensing temperature and refrigeration temperature on the cycle performance using zeotropic mixture refrigerant R23/R134a.The results show that when the mass fraction of the low boiling point component in the mixed refrigerant increases,the ejector pressure ratios decrease and the cycle COP increases,when condensing temperature increases,the ejector pressure ratios increase and COP decreases significantly,and when evaporating temperature increases, the ejector pressure ratios decrease, and the cycle COP increases.Under the same working conditions,COP of two-step dephlegmation cycle is greater than that of one-step dephlegmation cycle.Two-step dephlegmation cycle can obtain lower refrigeration temperature at-15℃ under the pressure ratio of ejector is about 1.8.关键词
R23/R134a/喷射制冷/自复叠制冷/分凝Key words
R23/R134a/ejector refrigeration/auto-cascade refrigeration/dephlegmation分类
通用工业技术引用本文复制引用
谈莹莹,王林,白得坡,闫晓娜..R23/R134a 一级分凝和二级分凝自复叠喷射制冷循环性能理论分析[J].化工学报,2016,67(z2):107-112,6.基金项目
国家自然科学基金项目(U1204525,50906021, U1504524) （U1204525,50906021, U1504524）
河南省高等学校重点科研项目计划项目(15A480001)。Foundation item：supported by the National Natural Science Foundation of China (U1204525,50906021, U1504524) and Henan Province Office of Education (15A480001) （15A480001）
