Upward-type flat-plate solar air heaters attached with fins and operated by an internal recycling for improved performance

doi:10.1016/j.jtice.2011.10.008

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 987654321/100089

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题名:	Upward-type flat-plate solar air heaters attached with fins and operated by an internal recycling for improved performance
作者:	Yeh, Ho-Ming
贡献者:	淡江大學化學工程與材料工程學系
关键词:	Solar air heater;Upward type;Flat-plate;Collector efficiency;Internal recycle;Attached fins
日期:	2012-03-11
上传时间:	2015-01-28 11:07:06 (UTC+8)
出版者:	Amsterdam: Elsevier BV
摘要:	The effect of internal recycle on the collector efficiency in upward-type flat-plate solar air heaters attached with fins has been investigated theoretically. The equations for predicting the outlet air temperature and the collector efficiency were derived from the energy balances on the absorbing plate and flow air. Considerable improvement in collector efficiency is obtainable if collector is attached with fins to extend the heat-transfer area, and if the operation is carried out with an internal recycle to increase the fluid velocity, leading to improved heat transfer coefficient. The enhancement in collector efficiency increases with increasing reflux ratio, especially for operating at lower air flow rate with higher inlet air temperature. It is found that more than 100% of improvement in collector efficiency is obtained by recycling operation. Furthermore, the performance in the device operated with internal recycle overcomes that in the same-size device operated with external recycle.
關聯:	Journal of the Taiwan Institute of Chemical Engineers 43(2), pp.235-240
DOI:	10.1016/j.jtice.2011.10.008
显示于类别:	[化學工程與材料工程學系暨研究所] 期刊論文

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