Optical properties of liquids for direct absorption solar thermal energy systems

被引：372
|
作者：
Otanicar, Todd P. [1 ]
Phelan, Patrick E. [1 ]
Golden, Jay S. [2 ,3 ]
机构：
[1] Arizona State Univ, Dept Mech & Aerosp Engn, Natl Ctr Excellence SMART Innovat, Tempe, AZ 85287 USA
[2] Arizona State Univ, Dept Civil & Environm Engn, Natl Ctr Excellence SMART Innovat, Tempe, AZ 85287 USA
[3] Arizona State Univ, Sch Sustainabil, Natl Ctr Excellence SMART Innovat, Tempe, AZ 85287 USA
来源：
SOLAR ENERGY | 2009年 / 83卷 / 07期
基金：
美国国家科学基金会;
关键词：
Optical properties; Fluids; Solar thermal energy; HEAT-TRANSFER CHARACTERISTICS; NANOFLUIDS; CONSTANTS;
D O I：
10.1016/j.solener.2008.12.009
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 method for experimentally determining the extinction index of four liquids (water, ethylene glycol, propylene glycol, and Therminol VP-1) commonly used in solar thermal energy applications was developed. In addition to the extinction index, we report the refractive indices available within the literature for these four fluids. The final value reported is the solar-weighted absorption coefficient for the fluids demonstrating each fluid's baseline capacity for absorbing solar energy. Water is shown to be the best absorber of solar energy of the four fluids, but it is still a weak absorber, only absorbing 13% of the energy. These values represent the baseline potential for a fluid to be utilized in a direct absorption solar thermal collector. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：969 / 977
页数：9
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