Akira Urano

Thermal environment simulation for three dimensional replacement of urban activity

Abstract The effect of a three-dimensional replacement of urban thermal environment activity is discussed on the basis of numerical simulation with a mesoscale climate model. Given a three-dimensional replacement of urban activity, greater concentration decreased surface air temperatures. Such concentration is apparently effective for modifying the thermal environment during the daytime, while the reduction of energy consumption is more effective during the night-time. Through sensitivity analysis, it is shown that building width and height variations with associated drag effects modify the environment near the ground.

Development of Low Carbon Districts Simulator

We developed an HVAC energy consumption simulation system for analyzing annual hourly transitions in the solar radiation environment. Since the solar environment is influenced by the configuration of buildings in a city block, the reflections between buildings, and the influence of roadside shade trees, it is important to understand the environment of the city block when planning building projects. We developed an annual solar radiation simulation method that uses a radiation balance analysis output database and standard climate data. The method reduces to 1/30th or less the number of analyses necessary to predict the annual hourly solar environment distribution as compared to the number required by the general method.