A study on the influence of Box-Windows on Natural Ventilation--CFD Simulation of the Elementary school classroom building

• Main Authors: LI-DONG Yang, 楊力東
• Other Authors: WEI-HWA CHIANG
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/78201842562798555184

碩士 === 國立臺灣科技大學 === 建築系 === 93 === ABSTRACT Box-Windows has good sound insulation performance. Further investigation is necessary regarding the ventilation of elementary school classroom building when applying Box-Windows. This research is directed against the general building of primary school and probe into the ventilation of the classroom space in the middle by way of cross-ventilation. First, the current study investigated the main factors that affect indoor airflow. The research was choose variables and divide into groups. The variable included airflow indoors which about: The Influence of every story, the opening area, way, and form, the shading devices position and depth. Second, when the Box-Windows under the sound insulation function, we try to let the Box-Windows reach the good ventilation result. The simulation Gradient wind velocity set 2.0 m/s. In the influence of the classroom position, inlet wind speed is roughly the same in every floor. The middle level is greater than other stories on inlet wind speed and the number value of side classroom smaller by 25% than that of the middle classroom. The average indoor air velocity at breezing height is smaller and smaller from 1F to 4F. The good aviation baffle, ex: horizontal louvers 20cm, the shading devices, or establishment of the balcony. That can reduce the difference of number value of the upper and lower storey, and let the number value increase unanimously. Vertical edition has good leading the wind result, too. The opening size of the horizontal louvers’ windows is two times as large as general opening size, so the ventilation is the best. Box-Windows except can separate the noise of disturbing, and can ward off the wind effectively. When the Box-Windows interval is small than 50cm, and the ventilation become badly. The shelf edition of lower 50cm just produced the ACH decay slightly. Box-Windows can be used when the interval between the glazing is controlled with certain range. When the outdoor gradient wind speed is 1m/s, classroom ACH can reach to standard value. Estimate the little wind speed outdoors. When the outdoor gradient wind speed is 0.2m/s blows to the corridor from classroom, Box-Windows at Interval 10cm is suitable. When the outdoor gradient wind speed is 0.5m/s blows to classroom from the corridor, Box-Windows at Interval 10cm is suitable, it is unfavorable to ventilating. If Box-Windows is applied with the horizontal louvers, it can increase the effectively of the ventilation. Key word: school classroom、CFD、Box-Windows、airflow indoors