Performance study of solar air heater having v-down discrete ribs on absorber plate

被引：95
作者：
Karwa, Rajendra [1 ]
Chitoshiya, Girish [2 ]
机构：
[1] JIET Sch Engn & Technol Girls, Jodhpur 342002, Rajasthan, India
[2] Jai Narain Vyas Univ, Fac Engn & Architecture, Dept Mech Engn, Jodhpur 342011, Rajasthan, India
来源：
ENERGY | 2013年 / 55卷
关键词：
Smooth and roughened duct solar air heater (collector); V-down discrete rib roughness; Thermal efficiency; Effective efficiency; FRICTION FACTOR CORRELATIONS; THERMOHYDRAULIC PERFORMANCE; TRANSFER COEFFICIENT; THERMAL PERFORMANCE; FLUID-FLOW; ROUGHNESS; TRANSVERSE; DUCTS; COLLECTOR; ANGLE;
D O I：
10.1016/j.energy.2013.03.068
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The paper presents results of an experimental study of thermo-hydraulic performance of a solar air heater with 60 degrees v-down discrete rib roughness on the airflow side of the absorber plate along with that for a smooth duct air heater. The enhancement in the thermal efficiency due to the roughness on the absorber plate is found to be 12.5-20% depending on the airflow rate; higher enhancement is at the lower flow rate. The experimental data have been generated and utilized to validate a mathematical model, which can be utilized for design and prediction of performance of both smooth and roughened air heaters under different operating conditions. The results of a detailed thermo-hydraulic performance study of solar air heater with v-down discrete rib roughness using the mathematical model are also presented along with the effect of variation of various parameters on the performance. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：939 / 955
页数：17
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