EFFECT OF NATURAL VENTILATION AND WIND DIRECTION ON THE THERMAL PERFORMANCE OF A BUILDING CEILING
Natural ventilation is rapidly becoming a significant part in the design strategy of buildings in situations where electricity is scare or non-existent and saving energy becomes highly important. The aim of present work is to reduce the ceiling temperature by natural ventilation through different opening locations (one window in the front fa鏰de and the other window in the rear wall) with sill height ratios of 0.27, 0.36, 0.45, 0.54, and 0.63. Wind tunnel and smoke tunnel were used to investigate the effect of opening locations on the temperature and heat transfer coefficient of a ceiling of a naturally-ventilated room. Here, the ANSYS CFD software was used to determine the flow characteristics in the ventilated room with different opening locations and wind direction. Better flow pattern and heat transfer from the heated ceiling are observed when the front and rear openings are located nearest to the ceiling and center, respectively. An experimental correlation was obtained to predict the influence of sill opening height ratio of front and rear walls on the average heat transfer coefficient ratio of ceiling (hav/ho ) where (ho) is the heat transfer coefficient in case of no wind.
Abdel Aziz Ali Ali Guirguis Nabil Milad Hassan Mahmoud Aly
Shoubra Faculty of Engineering Banha University, Egypt housing & Building Research Center Cairo, Egypt Housing & Building Research Center, Cairo, Egypt p.o.box:1770-cairo
国际会议
2007世界太阳能大会(Proceedings of ISES Solar World Congress 2007)
北京
英文
2007-09-18（万方平台首次上网日期，不代表论文的发表时间）