Experimental Research on a New Mini-Channel Transcritical CO<sub>2</sub> Heat Pump Gas Cooler
This paper presents the results of an experimental study on the heat transfer and pressure drop characteristics of a novel spiral plate mini-channel gas cooler designed for use with supercritical CO<sub>2</sub>. The CO<sub>2</sub> channel of the mini-channel spiral plate gas...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-05-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/14/5/1094 |
| _version_ | 1827740605816504320 |
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| author | Jiawei Jiang Shiqiang Liang Xiang Xu Buze Chen Zhixuan Shen Chaohong Guo Liqi Yu Shuo Qin |
| author_facet | Jiawei Jiang Shiqiang Liang Xiang Xu Buze Chen Zhixuan Shen Chaohong Guo Liqi Yu Shuo Qin |
| author_sort | Jiawei Jiang |
| collection | DOAJ |
| description | This paper presents the results of an experimental study on the heat transfer and pressure drop characteristics of a novel spiral plate mini-channel gas cooler designed for use with supercritical CO<sub>2</sub>. The CO<sub>2</sub> channel of the mini-channel spiral plate gas cooler has a circular spiral cross-section with a radius of 1 mm, while the water channel has an elliptical cross-section spiral channel with a long axis of 2.5 mm and a short axis of 1.3 mm. The results show that increasing the mass flux of CO<sub>2</sub> can effectively enhance the overall heat transfer coefficient when the water side mass flow rate is 0.175 kg·s<sup>−1</sup> and the CO<sub>2</sub> side pressure is 7.9 MPa. Increasing the inlet water temperature can also improve the overall heat transfer coefficient. The overall heat transfer coefficient is higher when the gas cooler is vertically oriented compared to horizontally oriented. A Matlab program was developed to verify that the correlation based on Zhang’s method has the highest accuracy. The study found a suitable heat transfer correlation for the new spiral plate mini-channel gas cooler through experimental research, which can provide a reference for future designs. |
| first_indexed | 2024-03-11T03:28:59Z |
| format | Article |
| id | doaj.art-0d402e61f12b49f5b8e9d7075ac29fcd |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-03-11T03:28:59Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-0d402e61f12b49f5b8e9d7075ac29fcd2023-11-18T02:31:40ZengMDPI AGMicromachines2072-666X2023-05-01145109410.3390/mi14051094Experimental Research on a New Mini-Channel Transcritical CO<sub>2</sub> Heat Pump Gas CoolerJiawei Jiang0Shiqiang Liang1Xiang Xu2Buze Chen3Zhixuan Shen4Chaohong Guo5Liqi Yu6Shuo Qin7Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, ChinaThis paper presents the results of an experimental study on the heat transfer and pressure drop characteristics of a novel spiral plate mini-channel gas cooler designed for use with supercritical CO<sub>2</sub>. The CO<sub>2</sub> channel of the mini-channel spiral plate gas cooler has a circular spiral cross-section with a radius of 1 mm, while the water channel has an elliptical cross-section spiral channel with a long axis of 2.5 mm and a short axis of 1.3 mm. The results show that increasing the mass flux of CO<sub>2</sub> can effectively enhance the overall heat transfer coefficient when the water side mass flow rate is 0.175 kg·s<sup>−1</sup> and the CO<sub>2</sub> side pressure is 7.9 MPa. Increasing the inlet water temperature can also improve the overall heat transfer coefficient. The overall heat transfer coefficient is higher when the gas cooler is vertically oriented compared to horizontally oriented. A Matlab program was developed to verify that the correlation based on Zhang’s method has the highest accuracy. The study found a suitable heat transfer correlation for the new spiral plate mini-channel gas cooler through experimental research, which can provide a reference for future designs.https://www.mdpi.com/2072-666X/14/5/1094transcritical carbon dioxide heat pump gas coolerspiral heat exchangerheat transferpressure drop |
| spellingShingle | Jiawei Jiang Shiqiang Liang Xiang Xu Buze Chen Zhixuan Shen Chaohong Guo Liqi Yu Shuo Qin Experimental Research on a New Mini-Channel Transcritical CO<sub>2</sub> Heat Pump Gas Cooler Micromachines transcritical carbon dioxide heat pump gas cooler spiral heat exchanger heat transfer pressure drop |
| title | Experimental Research on a New Mini-Channel Transcritical CO<sub>2</sub> Heat Pump Gas Cooler |
| title_full | Experimental Research on a New Mini-Channel Transcritical CO<sub>2</sub> Heat Pump Gas Cooler |
| title_fullStr | Experimental Research on a New Mini-Channel Transcritical CO<sub>2</sub> Heat Pump Gas Cooler |
| title_full_unstemmed | Experimental Research on a New Mini-Channel Transcritical CO<sub>2</sub> Heat Pump Gas Cooler |
| title_short | Experimental Research on a New Mini-Channel Transcritical CO<sub>2</sub> Heat Pump Gas Cooler |
| title_sort | experimental research on a new mini channel transcritical co sub 2 sub heat pump gas cooler |
| topic | transcritical carbon dioxide heat pump gas cooler spiral heat exchanger heat transfer pressure drop |
| url | https://www.mdpi.com/2072-666X/14/5/1094 |
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