The Improvement of Collector Efficiency in Solar Air Heaters by Simultaneously Air Flow over and under the Absorbing Plate

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Title:	The Improvement of Collector Efficiency in Solar Air Heaters by Simultaneously Air Flow over and under the Absorbing Plate
Authors:	Ho-Ming Yeh, Chii-Dong Ho and Jun-Ze Hou
Contributors:	淡江大學化學工程與材料工程學系
Date:	1999-10-01
Issue Date:	2016-04-22 13:20:29 (UTC+8)
Publisher:	Elsevier Ltd
Abstract:	The performance of double-flow type solar air heaters, in which air is flowing simultaneously over and under the absorbing plate, is more effective than that of the devices with only one flow channel over or under the absorbing plate because the heat-transfer area in double-flow systems is double. The effect of the fraction of mass flow rate in the upper or lower flow channel of a double-flow device on collector efficiencies, has also been investigated theoretically and experimentally. Considerable improvement in collector performance is obtained by employing a double-flow type solar air heater, instead of using a single-flow device, if the mass flow rates in both flow channels are kept the same.
Relation:	Energy 24(10), pp.857-871
DOI:	10.1016/S0360-5442(99)00043-2
Appears in Collections:	[Graduate Institute & Department of Chemical and Materials Engineering] Journal Article

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