制冷学报2024，Vol.45Issue(4)：43-50,8.DOI:10.3969/j.issn.0253-4339.2024.04.043
基于引射器与集成机械过冷的CO2热泵系统性能分析
Performance Analysis of CO2 Heat Pump System Based on Ejector and Integrated Mechanical Subcooling
摘要
Abstract
To reduce greenhouse gas emissions and improve the performance of space heating systems,a transcritical CO2 heat-pump heating system using an ejector and integrated mechanical subcooling(EJ-IMS)is proposed.A thermodynamic model of the system is developed with the coefficient of performance(COP)as the objective function,and the subcooling degree and discharge pressure are optimized.The winter heating performance of the system located in cities located in different climate zones was evaluated.The results show that the EJ-IMS system has a maximum COP,corresponding to the optimum subcooling degree and the optimum discharge pressure.The optimum subcooling degree is 26.44％-39.21％lower than that of the integrated mechanical subcooling system,and the optimum discharge pressure of the EJ-IMS system is 0.27％-9.37％lower than that of the baseline system and ejector system.The COP and exergetic efficiency of the EJ-IMS system are 6.09％-37.74％and 6.75％-46.02％higher than those of the three conventional systems,respectively.The heating seasonal performance factor of the EJ-IMS system is 6.89％-29.61％higher than those of the three systems,indicating that the EJ-IMS system is suitable in cold regions.This study provides a theoretical reference for the construction of efficient CO2 space-heating systems.关键词
集成机械过冷/引射器/跨临界CO2/热泵/供暖Key words
integrated mechanical subcooling/ejector/transcritical CO2/heat pump/space heating分类
通用工业技术引用本文复制引用
代宝民,杨佩芳,刘圣春,赵瑞瑞,曹羽,赵霖,李诚展,赵东鹏,肖鹏..基于引射器与集成机械过冷的CO2热泵系统性能分析[J].制冷学报,2024,45(4):43-50,8.基金项目
国家重点研发计划(2021YFE0116100)和国家自然科学基金(51806151)资助项目.(The project was supported by the National Key Research and Development Program of China(No.2021YFE0116100)and the National Natural Science Foundation of China(No.51806151).) 本文受教育部"春晖计划"合作科研项目(202200921)和天津市制冷技术重点实验室开放基金课题(2024TKLRT001)资助.(The project was supported by"Chunhui Plan"Collabora-tive Research Project of the Ministry of Education(No.202200921)and a grant from Tianjin Key Laboratory of Refrigera-tion Technology(No.2024TKLRT001).) （2021YFE0116100）
