NUMERICAL ANALYSIS ON RADIANT ENVIRONMENT OF OUTDOOR LIVING SPACECONSIDERING THE INFLUENCE OF SPATIAL FORM AND MATERIAL

Abstract

The object of this paper was to calculate a distribution of Mean Radiant Temperature taking solar radiation into account (MRT) in urban living space and to examine the thermal influence of urban/building design on MRT distribution. The calculation method was developed which allow predicting an MRT considering thermal infl uence of urban/ building design to reproduce spatial forms and materials of building and ground. And the MRT was calculated considering radiance distribution of sky radiation and atmospheric radiation, and multi-refl ected solar radiation. Considering sky radiance distribution, MRT distribution in medium-rise building block was calculated more precisely. As a result of calculation of MRT in actual urban block, reflected solar radiation and long wave radiation from pavement formed complex MRT distribution. Then MRT distribution was computed on condition that the pavement (solar reflectance 0.1) was change into cool pavement (solar refl ectance 0.6) in actural urban area. The radiation fi eld in cool pavement became worse because the increased budget of solar radiation for cool pavement was twice than the decreased budget of long wave radiation.