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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Main Authors: Yanhua Lai, Tao Wu, Shuping Che, Zhen Dong, Mingxin Lyu
Format: Article
Language:English
Published: SAGE Publishing 2013-01-01
Series:Advances in Mechanical Engineering
Online Access:https://doi.org/10.1155/2013/615742
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spelling 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
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AT taowu thermalperformancepredictionofatrapezoidalcavityabsorberforalinearfresnelreflector
AT shupingche thermalperformancepredictionofatrapezoidalcavityabsorberforalinearfresnelreflector
AT zhendong thermalperformancepredictionofatrapezoidalcavityabsorberforalinearfresnelreflector
AT mingxinlyu thermalperformancepredictionofatrapezoidalcavityabsorberforalinearfresnelreflector
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