Performance Analysis of CO2 Dual-temperature Evaporation Heat Pump System with an Ejector
Replacing conventional boilers with an efficient heat pump system is an effective solution to achieving “carbon peaking and carbon neutrality”. In this study, a CO2 heat pump system adopting an ejector to realize dual-temperature evaporation is proposed for cascade utilization of waste heat and high...
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| Format: | Article |
| Language: | zho |
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Journal of Refrigeration Magazines Agency Co., Ltd.
2022-01-01
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| Series: | Zhileng xuebao |
| Subjects: | |
| Online Access: | http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2022.02.054 |
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| author | Li Xiaoyan Dai Baomin Hua Xue Liu Chen Liu Shengchun |
| author_facet | Li Xiaoyan Dai Baomin Hua Xue Liu Chen Liu Shengchun |
| author_sort | Li Xiaoyan |
| collection | DOAJ |
| description | Replacing conventional boilers with an efficient heat pump system is an effective solution to achieving “carbon peaking and carbon neutrality”. In this study, a CO2 heat pump system adopting an ejector to realize dual-temperature evaporation is proposed for cascade utilization of waste heat and high-efficiency heating. Thermodynamic models of the baseline CO2 system (Base), conventional CO2 ejector system (Ej-Evap1), and CO2 ejector system with dual-temperature evaporation (Ej-Evap2) are developed based on the pinch method. The maximum coefficient of performance (COP) is achieved at the optimum discharge pressure for the dual-temperature evaporation system. Under the optimum working conditions, the results show that the maximum COP of the Ej-Evap2 system under nominal conditions is 4.84, which is 9.88% higher than that of the base. Double-temperature evaporation can significantly reduce the heat transfer irreversibility loss in the heat absorption process. The irreversible performance index of Ej-Evap2 during the evaporator process is 1.51, which is 24.50% lower than that of the base and Ej-Evap1 systems. |
| format | Article |
| id | doaj-art-9ff040410e4b4e35bc27403c0c88b318 |
| institution | OA Journals |
| issn | 0253-4339 |
| language | zho |
| publishDate | 2022-01-01 |
| publisher | Journal of Refrigeration Magazines Agency Co., Ltd. |
| record_format | Article |
| series | Zhileng xuebao |
| spelling | doaj-art-9ff040410e4b4e35bc27403c0c88b3182025-08-20T02:02:54ZzhoJournal of Refrigeration Magazines Agency Co., Ltd.Zhileng xuebao0253-43392022-01-014366503000Performance Analysis of CO2 Dual-temperature Evaporation Heat Pump System with an EjectorLi XiaoyanDai BaominHua XueLiu ChenLiu ShengchunReplacing conventional boilers with an efficient heat pump system is an effective solution to achieving “carbon peaking and carbon neutrality”. In this study, a CO2 heat pump system adopting an ejector to realize dual-temperature evaporation is proposed for cascade utilization of waste heat and high-efficiency heating. Thermodynamic models of the baseline CO2 system (Base), conventional CO2 ejector system (Ej-Evap1), and CO2 ejector system with dual-temperature evaporation (Ej-Evap2) are developed based on the pinch method. The maximum coefficient of performance (COP) is achieved at the optimum discharge pressure for the dual-temperature evaporation system. Under the optimum working conditions, the results show that the maximum COP of the Ej-Evap2 system under nominal conditions is 4.84, which is 9.88% higher than that of the base. Double-temperature evaporation can significantly reduce the heat transfer irreversibility loss in the heat absorption process. The irreversible performance index of Ej-Evap2 during the evaporator process is 1.51, which is 24.50% lower than that of the base and Ej-Evap1 systems.http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2022.02.054heat pump systemCO2ejectortemperature matchingdual-temperature evaporationirreversibility loss |
| spellingShingle | Li Xiaoyan Dai Baomin Hua Xue Liu Chen Liu Shengchun Performance Analysis of CO2 Dual-temperature Evaporation Heat Pump System with an Ejector Zhileng xuebao heat pump system CO2 ejector temperature matching dual-temperature evaporation irreversibility loss |
| title | Performance Analysis of CO2 Dual-temperature Evaporation Heat Pump System with an Ejector |
| title_full | Performance Analysis of CO2 Dual-temperature Evaporation Heat Pump System with an Ejector |
| title_fullStr | Performance Analysis of CO2 Dual-temperature Evaporation Heat Pump System with an Ejector |
| title_full_unstemmed | Performance Analysis of CO2 Dual-temperature Evaporation Heat Pump System with an Ejector |
| title_short | Performance Analysis of CO2 Dual-temperature Evaporation Heat Pump System with an Ejector |
| title_sort | performance analysis of co2 dual temperature evaporation heat pump system with an ejector |
| topic | heat pump system CO2 ejector temperature matching dual-temperature evaporation irreversibility loss |
| url | http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2022.02.054 |
| work_keys_str_mv | AT lixiaoyan performanceanalysisofco2dualtemperatureevaporationheatpumpsystemwithanejector AT daibaomin performanceanalysisofco2dualtemperatureevaporationheatpumpsystemwithanejector AT huaxue performanceanalysisofco2dualtemperatureevaporationheatpumpsystemwithanejector AT liuchen performanceanalysisofco2dualtemperatureevaporationheatpumpsystemwithanejector AT liushengchun performanceanalysisofco2dualtemperatureevaporationheatpumpsystemwithanejector |