Thermal Performance Prediction of a Trapezoidal Cavity Absorber for a Linear Fresnel Reflector
A trapezoidal cavity absorber for a linear Fresnel reflector concentrator is analyzed and optimized via CFD simulation. The heat loss coefficient is introduced; the influences of ambient temperature, absorber temperature, cavity depth, inclination of side walls, insulation thickness, glass window, a...
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2013-01-01
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Series: | Advances in Mechanical Engineering |
Online Access: | https://doi.org/10.1155/2013/615742 |
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doaj-bdbc659d46ac417f896ea36d08a339502020-11-25T02:58:08ZengSAGE PublishingAdvances in Mechanical Engineering1687-81322013-01-01510.1155/2013/61574210.1155_2013/615742Thermal Performance Prediction of a Trapezoidal Cavity Absorber for a Linear Fresnel ReflectorYanhua LaiTao WuShuping CheZhen DongMingxin LyuA trapezoidal cavity absorber for a linear Fresnel reflector concentrator is analyzed and optimized via CFD simulation. The heat loss coefficient is introduced; the influences of ambient temperature, absorber temperature, cavity depth, inclination of side walls, insulation thickness, glass window, and emissivity of selective absorption coating have been studied. The results show that radiation dominates the cavity heat loss, and heat loss through the glass window is higher than through the insulation layer; among these factors, impact of emissivity of selective absorption coating and insulation layer is greater than that of the other factors. The simulation results via CFD prove that cavity with a 100 mm depth shows the best thermal performance among the parameters that have been taken into account.https://doi.org/10.1155/2013/615742 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yanhua Lai Tao Wu Shuping Che Zhen Dong Mingxin Lyu |
spellingShingle |
Yanhua Lai Tao Wu Shuping Che Zhen Dong Mingxin Lyu Thermal Performance Prediction of a Trapezoidal Cavity Absorber for a Linear Fresnel Reflector Advances in Mechanical Engineering |
author_facet |
Yanhua Lai Tao Wu Shuping Che Zhen Dong Mingxin Lyu |
author_sort |
Yanhua Lai |
title |
Thermal Performance Prediction of a Trapezoidal Cavity Absorber for a Linear Fresnel Reflector |
title_short |
Thermal Performance Prediction of a Trapezoidal Cavity Absorber for a Linear Fresnel Reflector |
title_full |
Thermal Performance Prediction of a Trapezoidal Cavity Absorber for a Linear Fresnel Reflector |
title_fullStr |
Thermal Performance Prediction of a Trapezoidal Cavity Absorber for a Linear Fresnel Reflector |
title_full_unstemmed |
Thermal Performance Prediction of a Trapezoidal Cavity Absorber for a Linear Fresnel Reflector |
title_sort |
thermal performance prediction of a trapezoidal cavity absorber for a linear fresnel reflector |
publisher |
SAGE Publishing |
series |
Advances in Mechanical Engineering |
issn |
1687-8132 |
publishDate |
2013-01-01 |
description |
A trapezoidal cavity absorber for a linear Fresnel reflector concentrator is analyzed and optimized via CFD simulation. The heat loss coefficient is introduced; the influences of ambient temperature, absorber temperature, cavity depth, inclination of side walls, insulation thickness, glass window, and emissivity of selective absorption coating have been studied. The results show that radiation dominates the cavity heat loss, and heat loss through the glass window is higher than through the insulation layer; among these factors, impact of emissivity of selective absorption coating and insulation layer is greater than that of the other factors. The simulation results via CFD prove that cavity with a 100 mm depth shows the best thermal performance among the parameters that have been taken into account. |
url |
https://doi.org/10.1155/2013/615742 |
work_keys_str_mv |
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