Thermal performance of gas-filled flat plate solar collectors

被引：48
|
作者：
Vestlund, Johan [1 ]
Ronnelid, Mats [1 ]
Dalenback, Jan-Olof [2 ]
机构：
[1] Hogskolan Dalarna, Solar Energy Res Ctr, SE-78188 Borlange, Sweden
[2] Chalmers, S-41296 Gothenburg, Sweden
来源：
SOLAR ENERGY | 2009年 / 83卷 / 06期
关键词：
Solar collectors; Modeling; Heat losses; Inert gases;
D O I：
10.1016/j.solener.2008.12.005
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
A sealed space between absorber and cover glass in a flat plate solar collector makes it possible to reduce the influence of humidity condensate and dust at the same time as the enclosed space can be filled with a suitable gas for lowering the heat losses. This article describes the influence of different gases on the heat losses in a typical flat plate solar collector. A model of a gas-filled flat plate solar collector was built in Matlab with standard heat transfer formulas. The results show that the overall heat loss can be reduced by up to 20% when changing from air to an inert gas. It is further possible to reduce the distance between absorber and cover in order to reduce the mechanical stresses in the material with similar heat losses. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：896 / 904
页数：9
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