Testing of a Secondary Concentrator Integrated with a Beam-Down Tower System under Non-liquid Cooling Strategies
Name
Testing of a secondary concentrator integrated with a beam-down tower system under non-liquid cooling strategies.pdf
Description
Published version
Size
1.55 MB
Format
Unknown
Checksum (MD5)
da1221e545f0d9635660352bc4262765
Author(s)
Lahlou, Radia
Armstrong, Peter R.
Calvet, Nicolas
Slocum, Alexander H
Shamim, Tariq
Date Issued
2018
Publisher
AIP Publishing
Citation
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."
Version
Final published version
Abstract
© 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.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
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.
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DOI of Published Version
https://doi.org/10.1063/1.5067171
