Nanofluid flow inside a solar collector utilizing twisted tape considering exergy and entropy analysis

被引：111

作者：

Farshad, Seyyed Ali ^{[1
]}

Sheikholeslami, M. ^{[1
]}

机构：

[1] Babol Noshirvani Univ Technol, Dept Mech Engn, Babol Sar, Iran

来源：

RENEWABLE ENERGY | 2019年 / 141卷

关键词：

Solar collector; Nanofluid; Exergy; Twisted tape; Pressure drop; HEAT-TRANSFER; THERMAL PERFORMANCE; NATURAL-CONVECTION; WATER NANOFLUID; CFD; EFFICIENCY; CHANNEL; MODEL;

D O I：

10.1016/j.renene.2019.04.007

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The current investigation numerically scrutinizes exergy loss and heat transfer of mixture of Aluminum oxide and H2O through a solar collector. Finite volume method has been employed with considering realizable k - epsilon. Such turbulence model has been selected because of best agreement with previous experimental outputs. To assure the accuracy of code, comparisons with numerical and experimental outputs have been provided for different Reynolds number (Re), number of revolution (N) and diameter ratio (D*). Dispersing Al2O3 is apparently able to offer a more promotion on second law's performance. More turbulence mixing occurs when employing a turbolentor with extra revolution. As diameter ratio augments, exergy loss drops due to reduction of surface temperature. Increasing inlet velocity brings about a significant reduction in surface temperature which results in less exergy loss. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页码：246 / 258

页数：13

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