Performance Analysis of CO<sub>2</sub> Heat Pump System Based on Ejector and Integrated Mechanical Subcooling
To reduce greenhouse gas emissions and improve the performance of space heating systems, a transcritical CO<sub>2</sub> 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 coefficie...
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| Format: | Article |
| Language: | zho |
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Journal of Refrigeration Magazines Agency Co., Ltd.
2024-08-01
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| Series: | Zhileng xuebao |
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| Online Access: | http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2024.04.043 |
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| _version_ | 1849707525775032320 |
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| author | Dai Baomin Yang Peifang Liu Shengchun Zhao Ruirui Cao Yu Zhao Lin Li Chengzhan Zhao Dongpeng Xiao Peng |
| author_facet | Dai Baomin Yang Peifang Liu Shengchun Zhao Ruirui Cao Yu Zhao Lin Li Chengzhan Zhao Dongpeng Xiao Peng |
| author_sort | Dai Baomin |
| collection | DOAJ |
| description | To reduce greenhouse gas emissions and improve the performance of space heating systems, a transcritical CO<sub>2</sub> 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<sub>2</sub> space-heating systems. |
| format | Article |
| id | doaj-art-8a8e502e2b974174b91a711dd45da482 |
| institution | DOAJ |
| issn | 0253-4339 |
| language | zho |
| publishDate | 2024-08-01 |
| publisher | Journal of Refrigeration Magazines Agency Co., Ltd. |
| record_format | Article |
| series | Zhileng xuebao |
| spelling | doaj-art-8a8e502e2b974174b91a711dd45da4822025-08-20T03:15:54ZzhoJournal of Refrigeration Magazines Agency Co., Ltd.Zhileng xuebao0253-43392024-08-0145435068302154Performance Analysis of CO<sub>2</sub> Heat Pump System Based on Ejector and Integrated Mechanical SubcoolingDai BaominYang PeifangLiu ShengchunZhao RuiruiCao YuZhao LinLi ChengzhanZhao DongpengXiao PengTo reduce greenhouse gas emissions and improve the performance of space heating systems, a transcritical CO<sub>2</sub> 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<sub>2</sub> space-heating systems.http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2024.04.043integrated mechanical subcoolingejectortranscritical CO<sub>2</sub>heat pumpspace heating |
| spellingShingle | Dai Baomin Yang Peifang Liu Shengchun Zhao Ruirui Cao Yu Zhao Lin Li Chengzhan Zhao Dongpeng Xiao Peng Performance Analysis of CO<sub>2</sub> Heat Pump System Based on Ejector and Integrated Mechanical Subcooling Zhileng xuebao integrated mechanical subcooling ejector transcritical CO<sub>2</sub> heat pump space heating |
| title | Performance Analysis of CO<sub>2</sub> Heat Pump System Based on Ejector and Integrated Mechanical Subcooling |
| title_full | Performance Analysis of CO<sub>2</sub> Heat Pump System Based on Ejector and Integrated Mechanical Subcooling |
| title_fullStr | Performance Analysis of CO<sub>2</sub> Heat Pump System Based on Ejector and Integrated Mechanical Subcooling |
| title_full_unstemmed | Performance Analysis of CO<sub>2</sub> Heat Pump System Based on Ejector and Integrated Mechanical Subcooling |
| title_short | Performance Analysis of CO<sub>2</sub> Heat Pump System Based on Ejector and Integrated Mechanical Subcooling |
| title_sort | performance analysis of co sub 2 sub heat pump system based on ejector and integrated mechanical subcooling |
| topic | integrated mechanical subcooling ejector transcritical CO<sub>2</sub> heat pump space heating |
| url | http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2024.04.043 |
| work_keys_str_mv | AT daibaomin performanceanalysisofcosub2subheatpumpsystembasedonejectorandintegratedmechanicalsubcooling AT yangpeifang performanceanalysisofcosub2subheatpumpsystembasedonejectorandintegratedmechanicalsubcooling AT liushengchun performanceanalysisofcosub2subheatpumpsystembasedonejectorandintegratedmechanicalsubcooling AT zhaoruirui performanceanalysisofcosub2subheatpumpsystembasedonejectorandintegratedmechanicalsubcooling AT caoyu performanceanalysisofcosub2subheatpumpsystembasedonejectorandintegratedmechanicalsubcooling AT zhaolin performanceanalysisofcosub2subheatpumpsystembasedonejectorandintegratedmechanicalsubcooling AT lichengzhan performanceanalysisofcosub2subheatpumpsystembasedonejectorandintegratedmechanicalsubcooling AT zhaodongpeng performanceanalysisofcosub2subheatpumpsystembasedonejectorandintegratedmechanicalsubcooling AT xiaopeng performanceanalysisofcosub2subheatpumpsystembasedonejectorandintegratedmechanicalsubcooling |