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

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Title:	Heat-transfer enhancement in double-pass flat-plate solar air heaters with recycle
Authors:	葉和明
Contributors:	淡江大學化學工程與材料工程學系
Date:	2005-09-01
Issue Date:	2011-10-24 01:40:18 (UTC+8)
Abstract:	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.
Relation:	Energy 30, p.2796
DOI:	10.1016/j.energy.2005.01.006
Appears in Collections:	[Graduate Institute & Department of Chemical and Materials Engineering] Journal Article

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