| The hot-humid climate dominates the economic advanced areas along the ocean in east China. These areas have high speed in urbanization and large amount of population. However, the problems of poor-quality outdoor microclimate because of climate change are becoming worse. The objective of this thesis is to systematically research on the integrated effects of vegetation systems and their design factors on the outdoor thermal environment and building energy under four of the most-common types of residential community in these areas. The major study objects include:1) Field measurements of outdoor thermal environment in residential communities, face-to-face investigations of residents'outdoor thermal comfort in summer and investigations of energy consumption of apartment buildings and communities. A field experiment of outdoor thermal environment in summer was carried out in a typical residential community in Guangzhou. By combining field measurements of local meteorological parameters with thermal comfort surveys, the residents'thermal sensations were investigated in the public areas of the same community. Then a comparative analysis among various types of most commonly-used thermal comfort index was carried out to investigate their compliance in the hot-humid outdoor conditions. Vertical measurements of temperature and humidity were carried out in the LiWu Building in the campus of South China University of Technology during the summer season. Utility bills of apartment buildings in a residential community in Guangzhou were surveyed to analyze the landscaping effects on building energy consumption. All these experiment data and investigation results provide necessary information, evidence and data to validate the CFD software ENVI-met, studies on the integrated simulation method of outdoor thermal environment and parametric researches on landscaping design factors.2) Verification, validation and sensitive analysis of micro-climatic CFD simulation software ENVI-met in hot-humid climate. Employed Guangzhou as a target city, the settings in ENVI-met, including boundary condition type and vertical grid size were verified. The experiment results of a Guangzhou residential community was employed to validate the software. The default settings of vegetation types, material and water depth in ENVI-met were also sensitively tested. As a result, the simulation accuracy, best boundary condition type, vertical grid size, suitable vegetation, materials and their constructions for the application in hot-humid climate was obtained.3) Through combining software with various functions, an integrated simulation method of outdoor thermal environment and building energy consumption is presented. This method can be used to evaluate the effects of vegetation systems on microclimate in the levels of thermal safety, thermal comfort and building energy conservation. Taken the input and output requirements of ENVI-met and EQUEST, the thesis presented methods to obtain Micro TMD, extreme TMD and Macro TMY from traditional TMY data for various simulation purposes. A further validation and test showed that this method is applicable to hot-humid climate or any other climate.4) Four various arrays of buildings in a community were taken as a research sample to quantified the integrated effects of landscaping design factors, including greening ratio, water-area ratio, vegetation belts, vegetation types and their combination way. The relationships between these factors and thermal environmental parameters (wind, temperature, Heat Index, Mean Radiant Temperature and Standard Effective Temperature) were concluded from the integrated simulation of CFD and energy consumption. Simplified calculation formulas were regressed for green ratio, watered-area ratio, tree ratio and grass ratio in a community on the index of HI, MRT and SET. The thesis revealed that the formula of greening ratio agreed best with thermal comfort index for all the four different community types and thus can be applied to use in practice.
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