| Summary: | 碩士 === 國立臺北科技大學 === 能源與冷凍空調工程系碩士班 === 105 === Due to the urban heat island, crowded artificial builds and the lack of natural environments, the temperature in the city is higher than the surrounded villages and towns caused citizen discomfort. In order to improve the situation, this study uses CFD method to analyze the vegetation of green cover rate and height to the surrounding thermal environment influence.
The results show that the increase in green coverage can effectively reduce the ambient temperature, but the large area of planting vegetation will block the wind flow, affecting the cooling effect; the evaporative cooling effect of vegetation not only reduces the around temperature but also increases the amount of water in the air. Compared with no vegetation configuration, the environment produces humidification and cooling effect.
If increasing green coverage, the temperature reduce 5 ° C to 7 ° C in the downstream area of vegetation. On the other hand, the study of vegetation height will affect pedestrian height wind field. The results show that the height of 3 m vegetation are blocked at pedestrian height; Compared to 3 m vegetation height, for the 0.3m and 6m vegetation height, the air at pedestrian height can pass through, and take away the heat at the leeward
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