摘要
为减少温室气体的排放并提升供暖系统性能,提出了基于引射器与集成机械过冷的跨临界CO_(2)热泵供暖系统(EJ-IMS),并构建热力学模型,以系统COP为目标函数,对过冷度和排气压力进行优化,并对系统在不同气候区典型城市使用的冬季供暖性能进行评估。结果表明:EJ-IMS系统存在最大COP、最优过冷度和排气压力。EJ-IMS系统的最优过冷度比集成机械过冷系统(IMS)低26.44%~39.21%,最优排气压力比基本系统(BASE)和带引射器系统(EJ)低0.27%~9.37%。相比3种常规系统,EJ-IMS系统的COP和[火用]效率分别提高6.09%~37.74%和6.75%~46.02%。EJ-IMS系统的供暖性能系数(HSPF)相对3种系统提高6.89%~29.61%,其更适用于严寒地区。可为高效CO_(2)供暖系统的构建提供理论参考。
To reduce greenhouse gas emissions and improve the performance of space heating systems,a transcritical CO_(2) 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 CO_(2) space-heating systems.
作者
代宝民
杨佩芳
刘圣春
赵瑞瑞
曹羽
赵霖
李诚展
赵东鹏
肖鹏
Dai Baomin;Yang Peifang;Liu Shengchun;Zhao Ruirui;Cao Yu;Zhao Lin;Li Chengzhan;Zhao Dongpeng;Xiao Peng(Tianjin Key Laboratory of Refrigeration Technology,Tianjin University of Commerce,Tianjin,300134,China;Post-Doctoral Research Center of China Automotive Engineering Research Institute Co.,Ltd.,Chongqing,401122,China;School of Mechanical Engineering,Tianjin University,Tianjin,300350,China;Danhua Hongye Refrigeration Technology Co.,Ltd.,Tianjin,300131,China)
出处
《制冷学报》
CAS
CSCD
北大核心
2024年第4期43-50,共8页
Journal of Refrigeration
基金
国家重点研发计划(2021YFE0116100)
国家自然科学基金(51806151)资助项目
教育部“春晖计划”合作科研项目(202200921)
天津市制冷技术重点实验室开放基金课题(2024TKLRT001)资助
关键词
集成机械过冷
引射器
跨临界CO_(2)
热泵
供暖
integrated mechanical subcooling
ejector
transcritical CO_(2)
heat pump
space heating
