Development of analytical tools of urban heat environment for design of environmentally sound city

本项目旨在为环境友好型城市设计开发城市热环境评价分析工具系统。将城市地理信息系统(GIS)数据与建筑物的人为散热分析相结合，将得到的散热量三维分布用于中尺度分析或城市热环境分析，将东京所有建筑物的原始GIS多边形数据改造为适用于城市热分析的数值数据。重新布置了建筑空调模型(DOE-2)，以提供散热值。该模型适用于典型建筑，因为散热量取决于建筑用途和建筑大小。将得到的单位建筑面积散热值与建筑数据相结合，得到东京地区的散热量空间分布，设置了屋顶、地面、潜热排放等几种人为热排放方案。这些场景提供了三维尺度上的各种热排放分布。对输入人为热排放的中尺度气象模拟，利用地理信息系统对处理后污水作为空调冷却水的利用潜力进行了估算，从热排放的空间分布来看，直接用作冷却水和间接用作冷却塔补充水相结合是处理后污水的有效利用方式。

This project was aimed at development of system of analytical tools to evaluate the urban heat environment for design of environmentally sound city. Data from urban geographic information system (GIS) was combined with the analysis of anthropogenic heat discharge from buildings, and the obtained three-dimensional distribution of heat discharge was used for meso-scale analysis or urban heat environment.Original GIS polygon data of all buildings in Tokyo was reformed to numerical data suitable for urban heat analysis. Building air-conditioning model (DOE-2) was rearranged to provide heat discharge value. The model was applied to typical buildings because heat discharge depends on purpose of building use and building size. The obtained heat discharge value per floor area was combined with building data to obtain spatial distribution of heat discharge throughout Tokyo area.Several scenarios for discharging the anthropogenic heat such as discharging all heat from roof, from ground, or discharge as latent heat were set up. These scenarios provide various heat discharge distribution in three dimensional scale. Meso-scale meteorological simulation was conducted to which anthropogenic heat discharge was input.Potential of utilization of treated sewage for cooling water of air-conditioning was estimated using GIS.Combination of direct use as cooling water and indirect use as supplement water for cooling tower is effective way of use of treated sewage from the viewpoint of spatial distribution of heat discharge.