排气余热驱动的引射过冷CO2热泵系统性能分析OA
Performance Analysis of Ejector Subcooling Transcritical CO2 Heat Pump System Driven by the Discharge Waste Heat
为解决基本跨临界CO2空气源热泵系统(Base)应用于建筑空间供暖时节流损失大、性能下降的问题,提出压缩机排气余热驱动的引射过冷跨临界CO2空气源热泵系统(ESH).对ESH系统采用4种不同工质时的热力学性能进行了优化和分析.选取了5个不同典型城市的住宅建筑作为应用情景,对其供暖季节性能系数(HSPF)进行了分析.结果表明:ESH系统的COP随排气压力的增大先增加后降低,存在最优排气压力.相较于Base系统,使用R1234ze(Z)的ESH系统的性能系数提升最显著,最高可提升20.64%.ESH系统的排气压力比Base系统最高可降低9.20%,㶲效率可提升7.13%~18.61%.ESH系统的HSPF比Base系统高9.68%~14.21%,在严寒地区使用时性能提升更为显著.
To resolve the issues of significant throttling loss and performance degradation of a baseline transcritical CO2 air-source heat pump system(Base)for building space heating,an ejector subcooling transcritical CO2 air-source heat pump system(ESH)driven by the waste heat of the compressor discharge gas is proposed in this paper.The thermodynamic performance of the ESH system was optimized and analyzed using four working fluids.Five typical cities were selected for comparison,and the heating season performance factor(HSPF)was analyzed.The results reveal that the coefficient of performance(COP)of the ESH system first increased and then decreased with the increase of discharge pressure,and an optimal discharge pressure exists.Compared with the Base system,the ESH system using R1234ze(Z)displayed the most remarkable improvement in COP(with the highest increase of 20.64%).The discharge pressure of the ESH system reduced by up to 9.20%compared with that of the Base system,and the exergy efficiency increased by 7.13%-18.61%.The HSPF of the ESH system was 9.68%to 14.21%higher than that of the Base system.The performance improvement was higher when it was used in severely cold regions.
代宝民;王祥军;刘圣春;王明瑄;谢山东;李晨滋;张通
天津商业大学 天津市制冷技术重点实验室 天津 300134天津商业大学 天津市制冷技术重点实验室 天津 300134天津商业大学 天津市制冷技术重点实验室 天津 300134天津商业大学 天津市制冷技术重点实验室 天津 300134天津商业大学 天津市制冷技术重点实验室 天津 300134天津商业大学 天津市制冷技术重点实验室 天津 300134天津商业大学 天津市制冷技术重点实验室 天津 300134
通用工业技术
跨临界CO2引射过冷排气余热空气源热泵供暖季节性能系数
transcritical CO2ejector subcoolingwaste heat of discharge gasair-source heat pumpheating season performance factor
《制冷学报》 2026 (2)
35-42,8
国家自然科学基金(52476085)资助项目.The project was supported by the National Natural Science Foundation of China(No.52476085).本文受天津市自然科学基金项目(24JCZDJC00390)资助.The project was supported by the Tianjin Natural Science Foundation(No.24JCZDJC00390).
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