THERMAL EFFECTS OF BUILDINGS IN AN URBAN CANOPY : Part 2 A numerical model for an urban canopy

Abstract

In the first report, the thermal system of a single building is presented. In this paper, the following two thermal systems have been added to the building system into a united model. One is the radiant environment formed by a group of buildings, and another is the atmospheric heat transportation from the building surface to the outside of the urban canopy. Then numerical studies were carried out with this united model named urban canopy model. The results are as follows: 1) Increase in temperature at daytime is mainly the result of missing evaporative surface, and that at night is the result of decrease in radiant cooling. 2) Increase in temperature caused by the heat exhaust from the building leads to increased cooling load of the building. Namely, the building produces the load in itself.