| Summary: | 碩士 === 國立臺北科技大學 === 能源與冷凍空調工程系碩士班 === 102 === As the fast development of human technology, the urban green-house and heat island effect become more and more serious and cause an increase of global mean temperature. The previous studies have demonstrated that planting vegetation can be an effective way to reduce the environmental temperature. Adopting Taipei Xinsheng Park as a case study, this paper utilizes numerical simulation software to establish the steady-state three-dimensional conservation equations of mass, momentum and energy for the incompressible turbulent flow with a standard k-ε two-equation model for turbulence closure. The solar radiation and vegetation effects were also treated to predict the overall wind and temperature fields. This study also employed the 3D ultrasonic anemometers to conduct the field measurements of the wind direction and speed over the Xinsheng Park for validating the CFD results. The predictions shows that the environmental temperatures are reduced in presence of planting trees with the comfort level improved. However, vegetation reduces ambient wind speed and causes some vortex in its leeward side, causing gathering of particles and pollutants.
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