INCREASED SOLAR COLLECTOR'S EFFICIENCY WITH REVERSED-PASS AIR FLOW SYSTEM
作者:
Y. A. EL-TAWIL,
M. A. EL-ABD,
G. A. EL-WESHAHI,
期刊:
International Journal of Solar Energy
(Taylor Available online 1992)
卷期:
Volume 11,
issue 1-2
页码: 63-72
ISSN:0142-5919
年代: 1992
DOI:10.1080/01425919208909730
出版商: Taylor & Francis Group
关键词: Solar heating;Solar collector;Collector's efficiency
数据来源: Taylor
摘要:
The thermal performance of a solar heat collector in which the air path is reversed to flow beneath the absorber plate after passing over it was studied. This type of system is referred to by the authors as the Reversed-Pass Air Flow Collector. Under the same operating conditions (gas flow rate & tilt angle), the rise in air temperature, ΔT, was found to be 10 to 40% higher than that obtained with single-pass air flow (without reversing) system depending upon the prevailing weather conditions. The local heat transfer coefficient from the top surface of the absorber plate was calculated for both types of flow systems and was found to be almost equal. The increased rise in temperature, ΔT, with the reversed-pass air flow system led to an increase in the thermal efficiency of the solar collector.
点击下载:
PDF (138KB)
返 回