Abstract
This study examined the best form of the solar chimney for the natural ventilation by the scale down experiment and CFD simulation. As a result, in case of the horizontal cross section of the chimney smaller than 8m^2, the ventilation rate has increased when the horizontal cross section of the chimney increases. In case of the horizontal cross section 8m^2 or more, the ventilation hasn't increased when the horizontal cross section increases. And ventilation rate has hardly increased when the exhaust outlet is more than 5〜10m^2. Also, in case of the horizontal cross section of the chimney smaller than 8m^2, the ventilation rate has hardly increased when the cross-section ratio of the exhaust outlet to the horizontal cross sections is 1.2〜2. In case of the horizontal cross section 8m^2 or more, the ventilation rate has hardly increased when the cross-section ratio is 0.7〜1.2. And the aspect ratio 1:4 has shown maximum ventilation rate in case of 8m^2 of the chimney horizontal cross section. From these results, it found that the best form of solar chimney is 8m^2 of the horizontal cross section, 10m^2 of the exhaust outlet, 1.2 of the cross-section ratio and 1:4 of the aspect ratio.
