An Approach on the Correlation between Urban Morphological Parameters and Ventilation Performance

Abstract

This paper discusses the correlation between the morphological characteristics of urban public plots and ventilation performance. By keeping the floor area ratio (FAR) constant and changing the building site coverage (BSC) and building location as morphological parameters in the plots, nine idealized building configurations are established. The spatially-averaged wind velocity ratio (VRw) and the mean air temperature (AT) are presented as ventilation efficiency and energy indices. Two incident wind direction (45° and 90°) are adopted for comparative analysis. Results shows that, when the FAR is constant, the ventilation performance is closely related to the BSC and then have significant influence on the AT. When the BSC exceeds the threshold, the main factor affecting the ventilation performance is no longer the incident wind direction but the building configurations. And it is proved that this ideal configuration is feasible for the study of the correlation between urban morphological parameters and ventilation performance, which is also helpful in improving urban energy consumption.