| Summary: | 碩士 === 國立勤益科技大學 === 景觀設計系 === 104 === The import of greenery landscaping in metropolitan areas not only beautifies the environment, increases the green coverage ratio, relieves the urban heat island effect,and adjusts the microclimate, it also provides the windproof effect of green trees, and such a wind guide will affect the ventilation effects of a wind field and indoor ventilation in a building's external areas. A case study of a low-rise building space shows that, because a low-rise building is close to earth’s surface, the higher roughness and mutual shielding effect of the building and trees will produce resistance on the external wind field to cause lower wind speed, which has an adverse effect on a building’s internal natural ventilation. Therefore,with the premise of importing natural ventilation, the tree patterns near a building must be considered, and a set of effective design methods is constructed to meticulously standardize the different factors of trees, thus, it can achieve the effect of effective natural ventilation, reduce the energy consumption required by air conditioning, and improve the degree of thermal comfort in indoor environments. This study applies the research method of Computational Fluid Dynamics (CFD), and constructs numerical simulation between a building and different tree design conditions in order to analyze the relationship between indoor natural ventilation and adjacent trees. This study takes the trees outside a students’ dormitory and the low-rise indoor space at the National Chin-Yi University of Technology as the operational samples; in terms of research scope, this study mainly discusses the effect of the building’s open window areas, the configuration form of the surrounding trees, cultivation space, tree porosity, height, and other relevant factors regarding the building’s indoor air change rate. According to the research results, different tree patterns will affect the indoor air flow inflowing from the outside. Taking tree porosity as the example; regarding porosity ranging from 0.1 to 0.9,there are nearly 80 times of disparity in the air change rate per hour; regarding the cultivation space ranging from 5.5m to 8.5m, there are nearly 10 times of disparity in the air change rate per hour. Thus, it can be known that trees area important factor affecting the indoor air change rate. This study intends to obtain a reference basis for outdoor tree design according to the numeric value of the building’s indoor space through numerical simulation and analysis, which can be incorporated into the evaluation criteria to construct building sites in the future, and effectively improve the indoor environment quality of buildings with trees.
|
|---|
