Author： Yeh Ho-Ming Ho Chii-Dong
Publisher： MDPI
E-ISSN： 1996-1073|5|8|2692-2707
ISSN： 1996-1073
Source： Energies, Vol.5, Iss.8, 2012-07, pp. : 2692-2707
Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.
Abstract
The collector efficiency in a downward-type double-pass external-recycle solar air heater with fins attached on the absorbing plate has been investigated theoretically. Considerable improvement in collector efficiency is obtainable if the collector is equipped with fins and the operation is carried out with an external recycle. Due to the recycling, the desirable effect of increasing the heat transfer coefficient compensates for the undesirable effect of decreasing the driving force (temperature difference) of heat transfer, while the attached fins provide an enlarged heat transfer area. The order of performances in the devices of same size is: double pass with recycle and fins > double pass with recycle but without fins > single pass without recycle and fins.
Related content
Collector Efficiency in Downward-Type Internal-Recycle Solar Air Heaters with Attached Fins
Energies, Vol. 6, Iss. 10, 2013-10 ,pp. :
Access to resources
Recommend
Performance of Thermosyphon Solar Water Heaters in Series
By Liu Yi-Mei Chung Kung-Ming Chang Keh-Chin Lee Tsong-Sheng
Energies, Vol. 5, Iss. 9, 2012-08 ,pp. :
The Impact of Water Quality on the Use of Solar Water Heaters in Remote Islands of Taiwan
By Fan Kai-Chun Chang Keh-Chin Chung Kung-Ming
Water, Vol. 8, Iss. 11, 2016-11 ,pp. :