Effect of flow maldistribution on thermal performance of a solar air heater array with subcollectors in parallel

被引：19

作者：

Karwa, Rajendra

Karwa, Nitin

Misra, Rohit

Agarwal, P. C.

机构：

[1] Univ Addis Ababa, Fac Technol, Dept Mech Engn, Addis Ababa, Ethiopia

[2] Indian Inst Technol, Dept Engn Mech, New Delhi 110016, India

[3] Jai Narain Vyas Univ, Fac Engn, Dept Mech Engn, Jodhpur 342011, Rajasthan, India

来源：

ENERGY | 2007年 / 32卷 / 07期

关键词：

solar air heater array; subcollectors in parallel; flow imbalance; thermal performance;

D O I：

10.1016/j.energy.2006.08.002

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

This paper presents results of a theoretical study carried out to investigate the effect of flow maldistribution, caused by the manufacturing imperfections and tolerances, on the thermal efficiency of a solar air heater array with subcollectors in parallel. The air mass flow rate, ambient temperature, solar insolation and wind heat transfer coefficient have been systematically varied to study the effect under a wide range of these parameters. The collector length, duct height, and plate emissivity were also changed to study their effect. It has been found that the maximum reduction in thermal efficiency due to flow maldistribution is less than about 3% for an array with a commercial grade finish of duct surfaces and +/- 10% manufacturing tolerance for the duct height. (C) 2006 Elsevier Ltd. All rights reserved.

引用

页码：1260 / 1270

页数：11

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