Heat-transfer enhancement in double-pass flat-plate solar air heaters with recycle

被引：103

作者：

Ho, CD ^{[1
]}

Yeh, HM ^{[1
]}

Wang, RC ^{[1
]}

机构：

[1] Tamkang Univ, Dept Chem & Mat Engn, Fujisawa, Kanagawa 251, Japan

来源：

ENERGY | 2005年 / 30卷 / 15期

关键词：

D O I：

10.1016/j.energy.2005.01.006

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

This work theoretically and experimentally investigates a device for inserting an absorbing plate into the double-pass channel in a flat-plate solar air heater with recycle. This method substantially improves the collector efficiency by increasing the fluid velocity. The results are represented graphically and compared with a downward-type single-pass solar air heater. Considerable improvement in heat transfer is obtainable by employing recycle-type double-pass devices instead of single-pass devices or a conventional double-pass heater with the same flow rate. The absorbing plate location influence on heat-transfer efficiency enhancement and the hydraulic dissipated power increment is also discussed. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：2796 / 2817

页数：22

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