| 요약2 |
This study analyzed the performance of solar chimney system for natural ventilation in underground spaces. A mathematical model of the solar chimney was proposed in order to predict its performance under varying parameters(insolation, stack height, distance between absorber wall and glass, ratio of a cross sectional area, etc.). Steady state heat transfer equations were set up using a energy balanced equations and solved using a inverse matrix method. Numerical simulation program to analyze system was developed by using MATLAB. The ventilation performance of the solar chimney was determined by the temperature difference of air channel and inlet, and the temperature difference rose according to increasing insolation, height and distance. In addition, ventilation rate difference of 15% happened by the cross-area ratio. Through this study, performance comparison of solar chimney system for natural ventilation was fulfilled by numerical method. Further, experimental study is required to verify numerical simulation. |