Experimental Study on CO2 Heat Pump Thermal Battery System
CO2 heat pump thermal battery system consists of a water-source transcritical carbon dioxide heat pump coupled with hot and cold thermal storage, and its performance gradually decreases during the process of thermal energy storage. This paper presents experimental studies of a CO2 heat pump thermal...
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| Format: | Article |
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Journal of Refrigeration Magazines Agency Co., Ltd.
2017-01-01
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| Series: | Zhileng xuebao |
| Subjects: | |
| Online Access: | http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2017.05.057 |
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| author | Zhu Weiquan Liu Fang Cai Yang |
| author_facet | Zhu Weiquan Liu Fang Cai Yang |
| author_sort | Zhu Weiquan |
| collection | DOAJ |
| description | CO2 heat pump thermal battery system consists of a water-source transcritical carbon dioxide heat pump coupled with hot and cold thermal storage, and its performance gradually decreases during the process of thermal energy storage. This paper presents experimental studies of a CO2 heat pump thermal battery system. The performance of this system was tested under a variable water-circulation flow rate for the hot/cold tank, a variable compressor frequency, and electronic expansion valve (EEV) opening. The results show that adoption of a lower water-circulation flow rate allows the tank to obtain good thermal stratification and a larger capacity. Further, a high compressor frequency benefits the system performance. The EEV opening also influences the system performance. The overall coefficient of performance (COP) reaches a maximum of 5.49 when the compressor frequency is 50 Hz, the EEV opening is 330 pulse, and the hot and cold water flow rates are 0.1 and 0.2 m3/h, respectively. Moreover, through mathematical fitting, a correlation was established between the COP, the outlet temperatures of the hot and cold tanks, and the control parameter. Overall, the total COP is 6.29 when the optimal control strategy based on the genetic algorithm is applied. |
| format | Article |
| id | doaj-art-8261d3d948374a2eb57f0bfcb9e84252 |
| institution | DOAJ |
| issn | 0253-4339 |
| language | zho |
| publishDate | 2017-01-01 |
| publisher | Journal of Refrigeration Magazines Agency Co., Ltd. |
| record_format | Article |
| series | Zhileng xuebao |
| spelling | doaj-art-8261d3d948374a2eb57f0bfcb9e842522025-08-20T03:16:32ZzhoJournal of Refrigeration Magazines Agency Co., Ltd.Zhileng xuebao0253-43392017-01-013866512377Experimental Study on CO2 Heat Pump Thermal Battery SystemZhu WeiquanLiu FangCai YangCO2 heat pump thermal battery system consists of a water-source transcritical carbon dioxide heat pump coupled with hot and cold thermal storage, and its performance gradually decreases during the process of thermal energy storage. This paper presents experimental studies of a CO2 heat pump thermal battery system. The performance of this system was tested under a variable water-circulation flow rate for the hot/cold tank, a variable compressor frequency, and electronic expansion valve (EEV) opening. The results show that adoption of a lower water-circulation flow rate allows the tank to obtain good thermal stratification and a larger capacity. Further, a high compressor frequency benefits the system performance. The EEV opening also influences the system performance. The overall coefficient of performance (COP) reaches a maximum of 5.49 when the compressor frequency is 50 Hz, the EEV opening is 330 pulse, and the hot and cold water flow rates are 0.1 and 0.2 m3/h, respectively. Moreover, through mathematical fitting, a correlation was established between the COP, the outlet temperatures of the hot and cold tanks, and the control parameter. Overall, the total COP is 6.29 when the optimal control strategy based on the genetic algorithm is applied.http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2017.05.057CO2heat pumpthermal storageperformance testgenetic algorithm |
| spellingShingle | Zhu Weiquan Liu Fang Cai Yang Experimental Study on CO2 Heat Pump Thermal Battery System Zhileng xuebao CO2 heat pump thermal storage performance test genetic algorithm |
| title | Experimental Study on CO2 Heat Pump Thermal Battery System |
| title_full | Experimental Study on CO2 Heat Pump Thermal Battery System |
| title_fullStr | Experimental Study on CO2 Heat Pump Thermal Battery System |
| title_full_unstemmed | Experimental Study on CO2 Heat Pump Thermal Battery System |
| title_short | Experimental Study on CO2 Heat Pump Thermal Battery System |
| title_sort | experimental study on co2 heat pump thermal battery system |
| topic | CO2 heat pump thermal storage performance test genetic algorithm |
| url | http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2017.05.057 |
| work_keys_str_mv | AT zhuweiquan experimentalstudyonco2heatpumpthermalbatterysystem AT liufang experimentalstudyonco2heatpumpthermalbatterysystem AT caiyang experimentalstudyonco2heatpumpthermalbatterysystem |