Numerical Simulations on the Protection of the Molten Salt Thermal Tube under Cloud Occlusion
Based on the single tube model of the receiver, the temperature drop characteristics of the endothermic tube such as the heat flux, molten salt flow rate and surface convection heat transfer coefficient were studied through numerical simulations on the scenarios under cloud occlusion before and afte...
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| Format: | Article |
| Language: | zho |
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State Grid Energy Research Institute
2020-11-01
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| Series: | Zhongguo dianli |
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| Online Access: | https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.201903071 |
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| _version_ | 1850227269380866048 |
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| author | Lei FENG Gang XIAO Lei GUO Chenggang YANG Haiyan LIAO |
| author_facet | Lei FENG Gang XIAO Lei GUO Chenggang YANG Haiyan LIAO |
| author_sort | Lei FENG |
| collection | DOAJ |
| description | Based on the single tube model of the receiver, the temperature drop characteristics of the endothermic tube such as the heat flux, molten salt flow rate and surface convection heat transfer coefficient were studied through numerical simulations on the scenarios under cloud occlusion before and after protection schemes implemented. The results exhibit limited impacts of radiation heat flux density on the elapsed time for temperature at the molten salt outlet to decrease to close to the solidification point. Moreover, the greater the convection heat transfer coefficient, the more likely the molten salt solidification may appear; while the lower the molten salt inlet velocity, the longer time it will take for the molten salt outlet temperature to drop close to the solidification point. Without the protective device, the time taken to reach the freezing temperature of the molten salt at the outlet is about 20 seconds. The scheme of adding the protective device and reducing the inlet velocity of molten salt can be applied to extend the time by almost six times, or as much as 130 seconds. Thereby system security can be greatly improved. |
| format | Article |
| id | doaj-art-4a89efc097b64d16aa9994773f3d5116 |
| institution | OA Journals |
| issn | 1004-9649 |
| language | zho |
| publishDate | 2020-11-01 |
| publisher | State Grid Energy Research Institute |
| record_format | Article |
| series | Zhongguo dianli |
| spelling | doaj-art-4a89efc097b64d16aa9994773f3d51162025-08-20T02:04:52ZzhoState Grid Energy Research InstituteZhongguo dianli1004-96492020-11-01531122022610.11930/j.issn.1004-9649.201903071zgdl-51-9-fengleiNumerical Simulations on the Protection of the Molten Salt Thermal Tube under Cloud OcclusionLei FENG0Gang XIAO1Lei GUO2Chenggang YANG3Haiyan LIAO4Shenhua Guohua (Beijing) Electric Power Research Institute Co., Ltd., Beijing 100024, ChinaInstitute of Thermal Power Engineering, Zhejiang University, Hangzhou 310027, ChinaInstitute of Thermal Power Engineering, Zhejiang University, Hangzhou 310027, ChinaNuclear and Radiation Safety Centre MEE, Beijing 102400, ChinaShenhua Guohua (Beijing) Electric Power Research Institute Co., Ltd., Beijing 100024, ChinaBased on the single tube model of the receiver, the temperature drop characteristics of the endothermic tube such as the heat flux, molten salt flow rate and surface convection heat transfer coefficient were studied through numerical simulations on the scenarios under cloud occlusion before and after protection schemes implemented. The results exhibit limited impacts of radiation heat flux density on the elapsed time for temperature at the molten salt outlet to decrease to close to the solidification point. Moreover, the greater the convection heat transfer coefficient, the more likely the molten salt solidification may appear; while the lower the molten salt inlet velocity, the longer time it will take for the molten salt outlet temperature to drop close to the solidification point. Without the protective device, the time taken to reach the freezing temperature of the molten salt at the outlet is about 20 seconds. The scheme of adding the protective device and reducing the inlet velocity of molten salt can be applied to extend the time by almost six times, or as much as 130 seconds. Thereby system security can be greatly improved.https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.201903071absorber tubemolten salttemperature drop characteristiccloud occlusion |
| spellingShingle | Lei FENG Gang XIAO Lei GUO Chenggang YANG Haiyan LIAO Numerical Simulations on the Protection of the Molten Salt Thermal Tube under Cloud Occlusion Zhongguo dianli absorber tube molten salt temperature drop characteristic cloud occlusion |
| title | Numerical Simulations on the Protection of the Molten Salt Thermal Tube under Cloud Occlusion |
| title_full | Numerical Simulations on the Protection of the Molten Salt Thermal Tube under Cloud Occlusion |
| title_fullStr | Numerical Simulations on the Protection of the Molten Salt Thermal Tube under Cloud Occlusion |
| title_full_unstemmed | Numerical Simulations on the Protection of the Molten Salt Thermal Tube under Cloud Occlusion |
| title_short | Numerical Simulations on the Protection of the Molten Salt Thermal Tube under Cloud Occlusion |
| title_sort | numerical simulations on the protection of the molten salt thermal tube under cloud occlusion |
| topic | absorber tube molten salt temperature drop characteristic cloud occlusion |
| url | https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.201903071 |
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