Exergy based performance evaluation of solar air heater with arc-shaped wire roughened absorber plate

被引：113
作者：
Sahu, Mukesh Kumar [1 ]
Prasad, Radha Krishna [1 ]
机构：
[1] Natl Inst Technol, Dept Mech Engn, Jamshedpur 831014, Jharkhand, India
来源：
RENEWABLE ENERGY | 2016年 / 96卷
关键词：
Entropy generation rate; Exergy efficiency; Artificial roughness; Solar air heater; 2ND LAW OPTIMIZATION; FLUID-FLOW; ARTIFICIAL ROUGHNESS; FRICTION FACTOR; DUCT; RIB; EFFICIENCY; ENERGY;
D O I：
10.1016/j.renene.2016.04.083
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Exergy efficiency analysis is an useful method to evaluate overall performance of solar thermal systems as it takes into consideration of useful energy output and consequent pumping power requirement. In present work, an investigation on exergetic performance evaluation of solar air heater with arc-shaped wire rib roughened absorber plates has been made analytically by employing mathematical model and the results have been compared with a plane absorber plate solar air heater for similar operating conditions. The exergetic efficiency curves as a function of Reynolds number (Re) and temperature rise parameter (Delta T/I) for different roughness parameters have been plotted. The maximum enhancement in exergetic efficiency of roughened solar air heater as compared to smooth absorber plate solar air heater has been found as 56% corresponding to relative roughness height (e/D) = 0.0422. The design plots, exhibiting the optimum combination of roughness parameters, can be used to design arc shaped wire rib roughened solar air heater. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：233 / 243
页数：11
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