Heat-transfer enhancement of double-pass solar air heaters with external recycle

淡江大學機構典藏 > 工學院 > 化學工程與材料工程學系暨研究所 > 期刊論文 > Item 987654321/58177

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題名:	Heat-transfer enhancement of double-pass solar air heaters with external recycle
作者:	Yeh, Ho-ming;Ho, Chii-dong
貢獻者:	淡江大學化學工程與材料工程學系
關鍵詞:	Solar air heater;Collector efficiency;Double-pass operation;External recycle
日期:	2011-09-01
上傳時間:	2011-09-30 09:30:13 (UTC+8)
出版者:	Amsterdam: Elsevier BV
摘要:	The effects of double-pass and external-recycle operations on the collector efficiency in solar air heaters have been investigated theoretically. It is found that considerable improvement in collector efficiency is obtainable if the operation is carried out with an external recycle, where the desirable effect of increasing fluid velocity to decrease the heat transfer resistance compensates for the undesirable effect of decreasing the driving force (temperature difference) of heat transfer, due to the remixing at the inlet by recycle operation. The enhancement increases with increasing reflux ratio, especially for operating at lower air flow rate. Moreover, performance of double-pass solar air heater with recycling device is better in comparison to single-pass solar air heater of the same size.
關聯:	Journal of the Taiwan Institute of Chemical Engineers 42(5), pp.793-800
DOI:	10.1016/j.jtice.2011.02.010
顯示於類別:	[化學工程與材料工程學系暨研究所] 期刊論文

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