Testing of a Secondary Concentrator Integrated with a Beam-Down Tower System under Non-liquid Cooling Strategies
© 2018 Author(s). Three dimensional secondary concentrators are exposed to high radiation fluxes, part of which is absorbed by the reflecting material, leading to elevated wall temperatures which may cause reflectance degradation and mechanical distortion. Temperature monitoring and thermal manageme...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing
2021
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| Online Access: | https://hdl.handle.net/1721.1/138087 |
| _version_ | 1826211865935478784 |
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| author | Lahlou, Radia Armstrong, Peter R. Calvet, Nicolas Slocum, Alexander H. Shamim, Tariq |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering Lahlou, Radia Armstrong, Peter R. Calvet, Nicolas Slocum, Alexander H. Shamim, Tariq |
| author_sort | Lahlou, Radia |
| collection | MIT |
| description | © 2018 Author(s). Three dimensional secondary concentrators are exposed to high radiation fluxes, part of which is absorbed by the reflecting material, leading to elevated wall temperatures which may cause reflectance degradation and mechanical distortion. Temperature monitoring and thermal management is required. Existing 3D secondary concentrators used in beam-up or beam-down tower plants use water-based convective cooling for which failures and leaks have been reported. The present work tested two alternative non-liquid-based cooling strategies: enhanced radiative cooling using a high-emissivity paint and forced-air convective cooling. The concentrator under no cooling enhancement reached temperatures above the acceptable limit, indicating the need for better cooling. Forced-convective cooling had the most noticeable effect and proved sufficient for the considered testing conditions. The impact of radiative cooling enhancement was lower in the considered incident flux conditions, as the initial temperature without enhancement was relatively low. |
| first_indexed | 2024-09-23T15:12:39Z |
| format | Article |
| id | mit-1721.1/138087 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T15:12:39Z |
| publishDate | 2021 |
| publisher | AIP Publishing |
| record_format | dspace |
| spelling | mit-1721.1/1380872021-11-10T03:08:53Z Testing of a Secondary Concentrator Integrated with a Beam-Down Tower System under Non-liquid Cooling Strategies Lahlou, Radia Armstrong, Peter R. Calvet, Nicolas Slocum, Alexander H. Shamim, Tariq Massachusetts Institute of Technology. Department of Mechanical Engineering © 2018 Author(s). Three dimensional secondary concentrators are exposed to high radiation fluxes, part of which is absorbed by the reflecting material, leading to elevated wall temperatures which may cause reflectance degradation and mechanical distortion. Temperature monitoring and thermal management is required. Existing 3D secondary concentrators used in beam-up or beam-down tower plants use water-based convective cooling for which failures and leaks have been reported. The present work tested two alternative non-liquid-based cooling strategies: enhanced radiative cooling using a high-emissivity paint and forced-air convective cooling. The concentrator under no cooling enhancement reached temperatures above the acceptable limit, indicating the need for better cooling. Forced-convective cooling had the most noticeable effect and proved sufficient for the considered testing conditions. The impact of radiative cooling enhancement was lower in the considered incident flux conditions, as the initial temperature without enhancement was relatively low. 2021-11-09T21:51:13Z 2021-11-09T21:51:13Z 2018 2019-09-20T11:53:53Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/138087 Lahlou, Radia, Armstrong, Peter R., Calvet, Nicolas, Slocum, Alexander H. and Shamim, Tariq. 2018. "Testing of a Secondary Concentrator Integrated with a Beam-Down Tower System under Non-liquid Cooling Strategies." en 10.1063/1.5067171 Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf AIP Publishing Other repository |
| spellingShingle | Lahlou, Radia Armstrong, Peter R. Calvet, Nicolas Slocum, Alexander H. Shamim, Tariq Testing of a Secondary Concentrator Integrated with a Beam-Down Tower System under Non-liquid Cooling Strategies |
| title | Testing of a Secondary Concentrator Integrated with a Beam-Down Tower System under Non-liquid Cooling Strategies |
| title_full | Testing of a Secondary Concentrator Integrated with a Beam-Down Tower System under Non-liquid Cooling Strategies |
| title_fullStr | Testing of a Secondary Concentrator Integrated with a Beam-Down Tower System under Non-liquid Cooling Strategies |
| title_full_unstemmed | Testing of a Secondary Concentrator Integrated with a Beam-Down Tower System under Non-liquid Cooling Strategies |
| title_short | Testing of a Secondary Concentrator Integrated with a Beam-Down Tower System under Non-liquid Cooling Strategies |
| title_sort | testing of a secondary concentrator integrated with a beam down tower system under non liquid cooling strategies |
| url | https://hdl.handle.net/1721.1/138087 |
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