| 요약2 |
This study analyzed the design factors of natural ventilation system in solar chimney. A mathematical model of the solar chimney was proposed in order to predict its ventilation performance for various design factors(stack height, stack width, 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. In case that the height and distance of the system are changed in the same interval, increasing amount of ventilation was larger about 22 times by distance than height. Also, while design factors like the width, height and distance are changed in limited volume, the contribution to the ventilation performance shows the sequence of the width, distance and height in most of the range. In addition, ventilation rate difference of 15% happened by the cross-area ratio. Through this study, performance comparison of solar chimney system for various design factors was fulfilled by numerical method. Further, experimental study is required to verify numerical simulation. |