制冷学报2025，Vol.46Issue(5)：69-76,8.DOI:10.12465/j.issn.0253-4339.2025.05.069
热泵热水器中自然替代工质R1270和R290的充注量优选及性能研究
Research to Optimize the Refrigerant Charge of the Natural Refrigerants R1270 and R290 in Heat-Pump Water Heaters and Their Performance
摘要
Abstract
R1270 and R290 are alternative refrigerants with great potential.In this study,the influence of the refrigerant charge on the performance of the heat-pump water heater with R1270 and R290,the temperature distribution of the heat transfer fluids in the condenser,and the feasibility of replacing R22 with natural refrigerants were investigated.The results indicate that the refrigerant charge has a considerable influence on the cycle performance and the temperature distribution of the heat-transfer fluids in both systems.At the same optimal charge(0.90 kg),the R1270 and R290 systems achieved a maximum coefficient of performance(COP)of 4.443 and 4.317,respectively.At different refrigerant charges,two heat transfer pinch points and two maximum heat transfer temperature differences occurred in the condensers of both systems,and the locations of the first pinch point and the second maximum temperature difference point showed similar migrations with changes in refrigerant charge.Compared with the R22 system,both the R1270 and R290 systems,at optimal charge,achieved significantly better COP and discharge temperatures,exhibited relatively equivalent discharge pressures,and their heating capacities increased by 7.05％and decreased by 10.65％,respectively.Hence,R1270 can be preferred over R290 for replacing R22 in a heat-pump water heater.关键词
工质替代/R1270/R290/充注量/温度分布Key words
refrigerant replacement/R1270/R290/refrigerant charge/temperature distribution分类
通用工业技术引用本文复制引用
巨福军,侯力豪,刘清磊,王浩然,肖成杰,范晓伟..热泵热水器中自然替代工质R1270和R290的充注量优选及性能研究[J].制冷学报,2025,46(5):69-76,8.基金项目
本文受河南省青年科学基金项目(212300410317) （212300410317）
河南省科技攻关计划项目(222102320076) （222102320076）
河南省重点研发专项项目(231111320900,221111320200) （231111320900,221111320200）
中原工学院青年人才创新能力基金项目(K2020QN013)资助.(The project was sup-ported by Henan Provincial Youth Science Foundation Project(No.212300410317),Henan Provincial Science and Technology Planning Project(No.222102320076),Henan Province Key Re-search and Development Project(No.231111320900 & No.221111320200),and Zhongyuan University of Technology Young Talent Innovation Ability Fund Project(No.K2020QN013).) （K2020QN013）
