准二级高温热泵循环的性能分析及实验研究  

Performance Analysis and Experimental Study of Quasi-two-stage Heat Pump Cycle

作　　者：孙文倩 黄国华 谷再丰 杜伟伟 唐明生[3,4] 吴伟[5] Sun Wenqian;Huang Guohua;Gu Zaifeng;Du Weiwei;Tang Mingsheng;Wu Wei(Tongfang Smart Energy Co.,Ltd.,Beijing,100083,China;Building Energy Research Center,Tsinghua University,Beijing,100084,China;Technical Institute of Physics and Chemistry Chinese Academy of Sciences,Beijing,100190,China;Key Laboratory of Space Energy Conversion Technology,TIPC,CAS,Beijing,100190,China;School of Energy and Environment,City University of Hong Kong,Hong Kong,999077,China)

机构地区：[1]同方智慧能源有限责任公司,北京100083 [2]清华大学建筑节能研究中心,北京100084 [3]中国科学院理化技术研究所,北京100190 [4]中国科学院空间功热转换技术重点实验室,北京100190 [5]香港城市大学能源及环境学院,中国香港999077

出　　处：《制冷学报》2024年第5期98-104,共7页Journal of Refrigeration

摘　　要：为解决低温余热资源过剩与高温用热需求紧缺之间的矛盾,设计了一套基于准二级压缩的高温热泵机组,理论分析循环流程并进行优化设计,采用闪蒸器与回热器组合提高机组性能,开展了机组的性能实验,以制热量、制热COP、[火用]效率、冷凝压力、排气温度为性能指标,在冷凝器出水温度为85~120℃,蒸发器进水温度为50、60、70℃工况下,对机组性能进行分析。实测机组性能与理论计算结果吻合,蒸发器进水温度为49.8℃,冷凝器出水温度为118.1℃,机组制热量可达916.3 k W,制热COP为2.51,[火用]效率为46.3%,机组冷凝压力为1.8 MPa,排气温度为137℃,符合机组安全运行的要求。To solve the contradiction between the surplus of low-temperature waste heat resources and the shortage of high-temperature heat demand,this study designed a set of high-temperature heat pump unit based on quasi-two-stage compression.The cycle was analyzed theoretically,and the design was optimized.A combination of a flash tank and an internal heat exchanger was used to improve the performance of the unit,and a performance test of the unit was carried out.The performance of the unit was analyzed under conditions in which the outlet water temperature of the condenser was 85℃-120℃and the inlet water temperatures of the evaporator were 50℃,60℃,and 70℃.Heating capacity,coefficient of performance(COP),exergetic efficiency,condensing pressure,and discharge temperature were taken as the performance indicators.The performance of the experimental unit was consistent with the theoretically calculated performance.The inlet water temperature of the evaporator was 49.8℃,and the outlet water temperature of the condenser was 118.1℃.The maximum heat produced by the unit,COP,and exergy efficiency were 916.3 kW,2.51,and 46.3%,respectively.Meanwhile,the condensing pressure of the unit was 1.8 MPa,and the discharge temperature was 137℃;these values meet the safety requirements of the unit.

关 键 词：高温热泵 闪蒸器 回热器 制热性能 [火用]分析 

分 类 号：TB611[一般工业技术—制冷工程] TK115[动力工程及工程热物理—热能工程]