电子膨胀阀过热度设定值对车用热泵系统制热性能的影响  

Influence of superheat set value of electronic expansion valve on heating performance of vehicle heat pump system

作　　者：苏之勇 寇景康 李海军[1] 崔四齐[1] 翟俊杰 SU Zhiyong;KOU Jingkang;LI Haijun;CUI Siqi;ZHAI Junjie(School of Energy&Environment,Zhongyuan University of Technology,Zhengzhou 450007,China)

机构地区：[1]中原工学院能源与环境学院,郑州450007

出　　处：《流体机械》2022年第7期15-20,共6页Fluid Machinery

基　　金：国家自然科学基金项目(51676201);河南省重点科技攻关项目(202102310230);中原工学院自主创新应用研究项目(K2019YY013)。

摘　　要：为了研究在车用热泵系统中,电子膨胀阀过热度设定值对系统制热性能的影响,搭建车用热泵系统实验台,在超低温工况-10 ℃下,通过电子膨胀阀对蒸发器出口过热度、压缩机排气口过热度进行控制,分析电子膨胀阀过热度设定值对系统主要制热性能参数的影响。结果表明:当主阀过热度设定值从1 ℃升高到9 ℃时,压缩机排气温度随之升高,系统制热量降低了14.2%,压缩机功率降低了20.0%。当补阀过热度设定值从10 ℃升高到30 ℃时,压缩机排气温度随之升高,系统制热量降低了23.0%,压缩机功率降低了29.2%。主阀过热度最优设定值为5 ℃,补阀过热度最优设定值为20 ℃,此时系统制热能效比达到最佳。In order to study the influence of superheat set value of electronic expansion valve on the heating performance of the system,the experimental platform for vehicle heat pump system was built.Under the ultra-low temperature condition of-10℃,by controlling the superheat set values of evaporator outlet and compressor exhaust port by the electronic expansion valves,the influence of the superheat set values of the electronic expansion valve on the main heating performance parameters of the system was analyzed.The results show that when the superheat set value of the main valve increases from 1℃to 9℃,the exhaust temperature of the compressor increases,the heating capacity of the system decreases by 14.2%,and the compressor power decreases by 20.0%.When the superheat set value of the make-up valve increases from 10℃to 30℃,the exhaust temperature of the compressor increases,the heating capacity of the system decreases by 23.0%,and the compressor power decreases by 29.2%.When the optimal set value of superheat of the main valve is 5℃,and the optimal set value of superheat of the make-up valve is 20℃,the heating energy efficiency ratio of the system is the best.

关 键 词：车用热泵 电子膨胀阀 过热度 制热性能 

分 类 号：TH12[机械工程—机械设计及理论]