Research Progress on Convective Heat Transfer Characteristics of Supercritical Fluids in Curved Tube
Because of their compact structure, ease of processing and higher heat transfer coefficient, curved-tube heat exchangers are widely applied in various industry applications, such as nuclear power systems, solar-powered engineering, aircraft engine cooling systems and refrigeration and cryogenic syst...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-11-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/15/22/8358 |
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| author | Xinxin Liu Shuoshuo Li Liang Liu Chao He Zhuang Sun Faruk Özdemir Muhammad Aziz Po-Chih Kuo |
| author_facet | Xinxin Liu Shuoshuo Li Liang Liu Chao He Zhuang Sun Faruk Özdemir Muhammad Aziz Po-Chih Kuo |
| author_sort | Xinxin Liu |
| collection | DOAJ |
| description | Because of their compact structure, ease of processing and higher heat transfer coefficient, curved-tube heat exchangers are widely applied in various industry applications, such as nuclear power systems, solar-powered engineering, aircraft engine cooling systems and refrigeration and cryogenic systems. Accurate knowledge about the heat transfer characteristics of the supercritical fluids in the tube is critical to the design and optimization of a curved-tube heat exchanger. The available literature indicates that the flow of supercritical fluids flowing in curved tubes affected by the dual effects of the buoyancy force and centrifugal force is more complex compared to straight tubes. Therefore, to obtain insight into their unique characteristics and further research progress, this paper presents a comprehensive review of available experimental and numerical research works on fluids at supercritical pressure flowing in curved tubes. Overall, the secondary flow caused by the curvature enhances the heat transfer and delays the heat transfer deterioration, but it also causes a non-uniform heat transfer distribution along the circumferential direction, and the strengthening performance of the curved tube is damaged. Compared with the more mature theories regarding straight tubes, the flow structure, the coupling mechanism of buoyancy and centrifugal force, and the general heat transfer correlation of supercritical fluids in a curved tube still urgently need to be further studied. Most importantly, studies on the suppression of heat transfer oscillations and heat transfer inhomogeneities specific to curved tubes are scarce. Considering the current status and shortcomings of existing studies, some study topics for supercritical fluids in a curved tube are proposed. |
| first_indexed | 2024-03-09T18:22:11Z |
| format | Article |
| id | doaj.art-181c2b30dc214880900f51f1041075f1 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-09T18:22:11Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-181c2b30dc214880900f51f1041075f12023-11-24T08:11:50ZengMDPI AGEnergies1996-10732022-11-011522835810.3390/en15228358Research Progress on Convective Heat Transfer Characteristics of Supercritical Fluids in Curved TubeXinxin Liu0Shuoshuo Li1Liang Liu2Chao He3Zhuang Sun4Faruk Özdemir5Muhammad Aziz6Po-Chih Kuo7Key Laboratory of New Materials and Facilities for Rural Renewable Energy of Ministry of Agriculture and Rural Affairs, Collaborative Innovation Center of Biomass Energy, College of Mechanical & Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, ChinaKey Laboratory of New Materials and Facilities for Rural Renewable Energy of Ministry of Agriculture and Rural Affairs, Collaborative Innovation Center of Biomass Energy, College of Mechanical & Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, ChinaKey Laboratory of New Materials and Facilities for Rural Renewable Energy of Ministry of Agriculture and Rural Affairs, Collaborative Innovation Center of Biomass Energy, College of Mechanical & Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, ChinaKey Laboratory of New Materials and Facilities for Rural Renewable Energy of Ministry of Agriculture and Rural Affairs, Collaborative Innovation Center of Biomass Energy, College of Mechanical & Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, ChinaInstitute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, JapanProcess and Energy Department, Faculty of 3mE, Delft University of Technology, 2628 CB Delft, The NetherlandsInstitute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, JapanInstitute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, JapanBecause of their compact structure, ease of processing and higher heat transfer coefficient, curved-tube heat exchangers are widely applied in various industry applications, such as nuclear power systems, solar-powered engineering, aircraft engine cooling systems and refrigeration and cryogenic systems. Accurate knowledge about the heat transfer characteristics of the supercritical fluids in the tube is critical to the design and optimization of a curved-tube heat exchanger. The available literature indicates that the flow of supercritical fluids flowing in curved tubes affected by the dual effects of the buoyancy force and centrifugal force is more complex compared to straight tubes. Therefore, to obtain insight into their unique characteristics and further research progress, this paper presents a comprehensive review of available experimental and numerical research works on fluids at supercritical pressure flowing in curved tubes. Overall, the secondary flow caused by the curvature enhances the heat transfer and delays the heat transfer deterioration, but it also causes a non-uniform heat transfer distribution along the circumferential direction, and the strengthening performance of the curved tube is damaged. Compared with the more mature theories regarding straight tubes, the flow structure, the coupling mechanism of buoyancy and centrifugal force, and the general heat transfer correlation of supercritical fluids in a curved tube still urgently need to be further studied. Most importantly, studies on the suppression of heat transfer oscillations and heat transfer inhomogeneities specific to curved tubes are scarce. Considering the current status and shortcomings of existing studies, some study topics for supercritical fluids in a curved tube are proposed.https://www.mdpi.com/1996-1073/15/22/8358heat transfer characteristicssupercritical fluidscurved tubeheat transfer enhancementbuoyancy forcecentrifugal force |
| spellingShingle | Xinxin Liu Shuoshuo Li Liang Liu Chao He Zhuang Sun Faruk Özdemir Muhammad Aziz Po-Chih Kuo Research Progress on Convective Heat Transfer Characteristics of Supercritical Fluids in Curved Tube Energies heat transfer characteristics supercritical fluids curved tube heat transfer enhancement buoyancy force centrifugal force |
| title | Research Progress on Convective Heat Transfer Characteristics of Supercritical Fluids in Curved Tube |
| title_full | Research Progress on Convective Heat Transfer Characteristics of Supercritical Fluids in Curved Tube |
| title_fullStr | Research Progress on Convective Heat Transfer Characteristics of Supercritical Fluids in Curved Tube |
| title_full_unstemmed | Research Progress on Convective Heat Transfer Characteristics of Supercritical Fluids in Curved Tube |
| title_short | Research Progress on Convective Heat Transfer Characteristics of Supercritical Fluids in Curved Tube |
| title_sort | research progress on convective heat transfer characteristics of supercritical fluids in curved tube |
| topic | heat transfer characteristics supercritical fluids curved tube heat transfer enhancement buoyancy force centrifugal force |
| url | https://www.mdpi.com/1996-1073/15/22/8358 |
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