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多孔介质期刊
影响因子: 1.061 5年影响因子: 1.151 SJR: 0.504 SNIP: 0.671 CiteScore™: 1.58

ISSN 打印: 1091-028X
ISSN 在线: 1934-0508

多孔介质期刊

DOI: 10.1615/JPorMedia.v18.i9.10
pages 835-842

EXPERIMENTAL STUDY OF AIR COOLING USING A MEMBRANE-COVERED TRAY

Mohamed Ali
King Saud University, College of Engineering, Mechanical Engineering Department, P. O. Box 800, Riyadh 11421, Saudi Arabia
O. Zeitoun
Mechanical Engineering Department, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia
H. Al-Ansary
Department of Mechanical Engineering, King Saud University, Riyadh, Saudi Arabia
A. Nuhait
Mechanical Engineering Department, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia

ABSTRACT

An experimental study is conducted to cool the outdoor air using a new humidification technique. A wind tunnel is built with a membrane-covered tray serving as a test section. Outdoor air passes over a tray full of water and covered by a specific membrane. Air temperature and relative humidity data are measured before and after the tray for several air velocities and for three different angles of the tray. Air velocity is measured at different locations along the centerline of the rectangular wind tunnel cross section before the tray. For almost fixed outdoor temperature before the test section, results show that as the angle of the tray increases, the drop in air temperature increases, which improves the efficiency of the humidification technique. This enhancement is reflected by a maximum and minimum drop in air temperature of 13.05°C and 2.41°C, respectively. This maximum cooling is obtained using a 10°C tray angle orientation. Results also show in general that as the tray angle increases, the difference in the air relative humidity before and after the test section increases at high air velocities.


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