Conjugate heat transfer analysis of molten salt in annular heater with rectangular wire coil
In this study, the detailed flow and heat transfer characteristics of molten salt for conjugate annular channel heater with rectangular wire coil were numerically investigated. Three-dimensional computational models are established based on the CFD software FLUENT, and are validated against the esta...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-03-01
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| Series: | Results in Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590123022000287 |
| _version_ | 1818157640761475072 |
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| author | Yang Yang Yang Zou Chong Zhou |
| author_facet | Yang Yang Yang Zou Chong Zhou |
| author_sort | Yang Yang |
| collection | DOAJ |
| description | In this study, the detailed flow and heat transfer characteristics of molten salt for conjugate annular channel heater with rectangular wire coil were numerically investigated. Three-dimensional computational models are established based on the CFD software FLUENT, and are validated against the established empirical correlations. Good agreement is achieved within the considered range of Reynolds (Re = 673–1318). The effect of inner tube is evaluated and discussed based on numerical results. The simulated results show that radial velocity and tangential velocity are generated, and meanwhile two vortices are formed, as compared to the smooth annular channel heater. And The heat transfer is strengthened due to vortices. The distribution of local Nusselt number is not uniform, and hot spot zones are generated in the windward and leeward sides of rectangular wire coil, which are less than that of non-conjugate annular channel heater. This result revealed that the conjugate model must be established when considering the hot spot zone. Nu and f correlations are proposed to predict heat transfer and pressure drop for conjugate annular channel heater. Finally, the overall performance is evaluated based on the principle of entropy production, the value of which is in the range of 0.212–0.245. |
| first_indexed | 2024-12-11T15:17:25Z |
| format | Article |
| id | doaj.art-5f0a37a02a594cf3a002a18571f34b82 |
| institution | Directory Open Access Journal |
| issn | 2590-1230 |
| language | English |
| last_indexed | 2024-12-11T15:17:25Z |
| publishDate | 2022-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Engineering |
| spelling | doaj.art-5f0a37a02a594cf3a002a18571f34b822022-12-22T01:00:31ZengElsevierResults in Engineering2590-12302022-03-0113100358Conjugate heat transfer analysis of molten salt in annular heater with rectangular wire coilYang Yang0Yang Zou1Chong Zhou2Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China; CAS Innovative Academy in TMSR Energy System, Chinese Academy of Sciences, Shanghai, 201800, China; Corresponding author. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China.Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China; CAS Innovative Academy in TMSR Energy System, Chinese Academy of Sciences, Shanghai, 201800, China; Corresponding author. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China.Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China; CAS Innovative Academy in TMSR Energy System, Chinese Academy of Sciences, Shanghai, 201800, ChinaIn this study, the detailed flow and heat transfer characteristics of molten salt for conjugate annular channel heater with rectangular wire coil were numerically investigated. Three-dimensional computational models are established based on the CFD software FLUENT, and are validated against the established empirical correlations. Good agreement is achieved within the considered range of Reynolds (Re = 673–1318). The effect of inner tube is evaluated and discussed based on numerical results. The simulated results show that radial velocity and tangential velocity are generated, and meanwhile two vortices are formed, as compared to the smooth annular channel heater. And The heat transfer is strengthened due to vortices. The distribution of local Nusselt number is not uniform, and hot spot zones are generated in the windward and leeward sides of rectangular wire coil, which are less than that of non-conjugate annular channel heater. This result revealed that the conjugate model must be established when considering the hot spot zone. Nu and f correlations are proposed to predict heat transfer and pressure drop for conjugate annular channel heater. Finally, the overall performance is evaluated based on the principle of entropy production, the value of which is in the range of 0.212–0.245.http://www.sciencedirect.com/science/article/pii/S2590123022000287Molten saltAnnular channel heaterRectangular wire coilHot spot zonePrinciple of entropy production |
| spellingShingle | Yang Yang Yang Zou Chong Zhou Conjugate heat transfer analysis of molten salt in annular heater with rectangular wire coil Results in Engineering Molten salt Annular channel heater Rectangular wire coil Hot spot zone Principle of entropy production |
| title | Conjugate heat transfer analysis of molten salt in annular heater with rectangular wire coil |
| title_full | Conjugate heat transfer analysis of molten salt in annular heater with rectangular wire coil |
| title_fullStr | Conjugate heat transfer analysis of molten salt in annular heater with rectangular wire coil |
| title_full_unstemmed | Conjugate heat transfer analysis of molten salt in annular heater with rectangular wire coil |
| title_short | Conjugate heat transfer analysis of molten salt in annular heater with rectangular wire coil |
| title_sort | conjugate heat transfer analysis of molten salt in annular heater with rectangular wire coil |
| topic | Molten salt Annular channel heater Rectangular wire coil Hot spot zone Principle of entropy production |
| url | http://www.sciencedirect.com/science/article/pii/S2590123022000287 |
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