THERMAL PERFORMANCE OF A CYLINDRICAL SOLAR COLLECTOR

被引：6
|
作者：
BADRAN, AA [1 ]
机构：
[1] UMM AL QURA UNIV,FAC ENGN & ISLAM ARCHITECTURE,DEPT MECH ENGN,MECCA,SAUDI ARABIA
来源：
ENERGY CONVERSION AND MANAGEMENT | 1991年 / 32卷 / 03期
关键词：
SOLAR ENERGY; CYLINDRICAL COLLECTORS;
D O I：
10.1016/0196-8904(91)90125-3
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
A new, cylindrical-type solar collector is designed, built and tested. The absorber is a steel cylinder, 580 mm dia, in which another cylinder, 510 mm dia, is placed. An annular gap, 35 mm wide, is thereby formed between the two cylinders, and the gap is filled with water. The outside cylinder is enclosed by plastic film glazing, and the ends of the cylinder are insulated. The collector's cylindrical axis is tilted 45-degrees to the horizontal such that the vertical plane including this axis is oriented due south. The direct solar radiation falling on the collector is thereby interrupted by the same projected area of the collector without the need for tracking. Water in the annular gap is heated and circulated via the thermosyphonic driving force. The instantaneous efficiency curve is experimentally obtained. The maximum efficiency obtained is 85%.
引用
收藏
页码：217 / 222
页数：6
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