Investigation of daylighting and airflow passing through different geometric louvers

• Main Authors: Nguyen NgocTu, 阮玉秀
• Other Authors: Wei Hwa Chiang
• Format: Others
• Language: en_US
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/59861655365678845161

碩士 === 國立臺灣科技大學 === 建築系 === 98 === The most significant element affecting the architectural environment in the tropical and subtropical region is solar energy, which influences either its inside or outside the buildings. External louvers can be utilized to block the solar radiation before it reaches the indoor environment, hence, more effective than internal louvers system. On the other hand, external louvers will reduce the daylighting intensity, wind velocity as well as the air change rate inside the buildings. This study discusses the impacts of several different prototypes of external louvers in a classroom in Taipei via the use of ECOTECT/RADIANCE trial version package for daylighting and PHOENICS Computation Fluid Dynamics software for natural ventilation simulations. The preliminary study of louver design based on daylighting, while natural ventilation is unpredictable; hence the advanced study of airflow through louvers was essential and implemented, the effect of louver tails was discovered. The new louvers for advanced study of daylighting and ventilation were re-organized with the concern of solar heat gain. The results showed that the w-shape and the curve part influences on daylighting illuminance while the louver tail’s angle obviously affects the wind velocity. The combination of these two elements may create a better louver type, even if it is not so easy to create the optimal louvers on both daylighting and ventilation. Finally, summarizes the results of this work and indicates future work required to figure out the best louver geometry and the influences on louvers for indoor air quality.