Experimental photothermal performance of nanofluids under concentrated solar flux

被引：60
作者：
Amjad, Muhammad [1 ,2 ]
Jin, Haichuan [1 ,4 ]
Du, Xiaoze [3 ]
Wen, Dongsheng [1 ,4 ]
机构：
[1] Univ Leeds, Sch Chem & Proc Engn, Leeds LS2 9JT, W Yorkshire, England
[2] Univ Engn & Technol, Dept Mech Engn, KSK Campus, Lahore, Pakistan
[3] North China Elect Power Univ, Sch Energy Power & Mech Engn, Beijing 102206, Peoples R China
[4] Beihang Univ, Sch Aeronaut Sci & Engn, Beijing 100191, Peoples R China
来源：
SOLAR ENERGY MATERIALS AND SOLAR CELLS | 2018年 / 182卷
基金：
美国国家科学基金会;
关键词：
Nanofluid; Photothermal conversion; Direct absorption; Sensible heat; Vapor generation; AL2O3-H2O NANOFLUID; CONVERSION CHARACTERISTICS; STEAM-GENERATION; EFFICIENCY; HEAT; FLOW; NANOBUBBLES;
D O I：
10.1016/j.solmat.2018.03.044
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：
Nanoparticle based direct solar absorption is a promising technology for future solar thermal systems. Having so many individual studies on different nanomaterials for solar energy harness, a comprehensive comparison of photothermal conversion characteristics of various nanofluids at the same experimental conditions is much needed. The photothermal conversion performance of six commonly used nanomaterials in direct absorption solar collectors (DASC) was investigated under a focused simulated solar flux. The contribution of sensible heating and latent heat of vaporization of the nanofluids was revealed in context of their photothermal performance. The results show that all the nanofluids have higher solar energy absorption than the base fluid and silver nanofluid turned out to be the best amongst all due its strong plasmonic resonance nature. A 99.7% enhancement in the photothermal conversion efficiency of silver was achieved within the experimental domain. A simulation model was proposed to state the temperature difference between the surface of the nanoparticle and the surrounding fluid under lower solar flux.
引用
收藏
页码：255 / 262
页数：8
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