新型混合工质用于补气式大温跨热泵的变工况性能研究  

Study on the variable performance of a new type of mixed working fluid used in the enhanced vapor injection heat pump with large temperature span

作　　者：闫超杰 郭健翔[1] 孙晋飞 张龙 包思凡 罗思义[1] YAN Chaojie;GUO Jianxiang;SUN Jinfei;ZHANG Long;BAO Sifan;LUO Siyi(School of Environmental and Municipal Engineering,Qingdao Technological University,Qingdao 266525,China)

机构地区：[1]青岛理工大学环境与市政工程学院,山东青岛266525

出　　处：《流体机械》2022年第8期15-21,共7页Fluid Machinery

基　　金：国家重点研发计划项目(2020YFD1100302);山东省自然科学基金项目(A2020-099)。

摘　　要：针对大温跨单级热泵系统存在的排温增加、压比增大、循环性能大幅降低等问题,采用非共沸混合工质补气式大温跨热泵循环,在理论循环分析的基础上,对混合工质R134a/R245fa进行组分优化,提出新型二元混合工质M,在蒸发进水温度25~40℃、冷凝出水温度60~85℃的工况范围内进行试验研究。结果表明:系统在蒸发进水温度25℃,冷凝出水温度80℃的大温升工况下,COP达到2.127,排气温度仅为100.2℃,表明工质M在大循环温升工况下,具有较好的性能,满足低温热源、更高出水温度的使用要求。For the problems of increased exhaust temperature,increased pressure ratio and substantial reduction of cycle performance existing in the single-stage heat pump with large temperature span,the large temperature span heat pump cycle with non-azeotropic mixed working fluid vapor injection was used,and based on the theoretical cycle analysis,the components of the mixed working fluid R134a/R245fa were optimized,and a new two-component mixed working fluid M was tested and researched in the working condition range of entering water of evaporator at 25~40℃and leaving water of condenser at 60~85℃.The results show that under the working conditions of large temperature rise with evaporator entering water temperature of 25℃and condenser leaving water temperature of 80℃,the COP of the system reaches 2.127,the exhaust temperature is only 100.2℃,indicating the working fluid M has good performance under the condition of large cycle temperature rise,which can meet the use requirements of low-temperature heat source and higher leaving water temperature.

关 键 词：混合工质 中高温热泵 大温跨 强化补气 实验研究 

分 类 号：TH12[机械工程—机械设计及理论] TB6[一般工业技术—制冷工程]