Abstract
In this paper, the relationship between ventilation efficiency and air outlets/return-intake systems in atrium space were analyzed by experimental studies and also by numerical simulation based on computational fluid dynamics(CFD). The conclusions are as follows; 1. In the case of cooling and the occupied zone being limited the ventilation efficiency has increased by arranging the supply outlets at the lower part of the atrium. 2. In the case of a vertical supply from the floor, a exhaust system at the ceiling is more desirable than that of the wall. 3. Effective arrangements for both the heating and the cooling modes are to supply the air from the wall at a height of 3500mm and exhaust it at the wall, and to supply it from the floor and exhaust it at the ceiling.
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