东南大学学报（自然科学版）2016，Vol.46Issue(6)：1221-1226,6.DOI:10.3969/j.issn.1001-0505.2016.06.019
聚光条件下纳米流体非均匀集热特性分析
Analysis on solar collection characteristics of nanofluid under non-uniform concentrated radiation
摘要
Abstract
A nanofluid-based direct absorption solar collector (NDASC )operated with a parabolic trough concentrator was studied.The radiation transmission and the heat transfer mechanism within the nanofluid were mathematically modeled, and the spectral absorption properties of CuO/oil nanofluid with different mass fractions of CuO nanoparticles were investigated.Then,performance characteristics of the NDASC operated under non-uniform concentrated solar radiation flux were nu-merically simulated.The influences of mass fraction of nanoparticles on the NDASC temperature dis-tribution of NDASC and collection efficiency were analyzed at temperature from 40 to 150 ℃.Re-sults show that the temperature difference on the inner tube wall of NDASC is much lower than that of a conventional solar collector employing coated tube.With the increase of the mass fraction of nanoparticles,the absorption coefficient of nanofluid increases,and the temperature distribution in the NDASC becomes more non-uniform,but the collection efficiency first increases and then decrea-ses.Furthermore,the optimum mass fraction of the nanofluid is obtained to achieve the highest col-lection efficiency.关键词
纳米流体/太阳能集热器/聚光/集热效率/温度分布Key words
nanofluid/solar collector/solar concentration/collection efficiency/temperature distri-bution分类
能源科技引用本文复制引用
徐国英,陈彩,张小松,陈伟..聚光条件下纳米流体非均匀集热特性分析[J].东南大学学报（自然科学版）,2016,46(6):1221-1226,6.基金项目
国家自然科学基金资助项目（51676046）、“十二五”国家科技支撑计划资助项目（2014BAJ01B05-2）． （）
