Effects of Different Air distributions on the Thermal Environment in the Office

Three kinds of air distribution, including "upper supply and top return", "upper supply and lower return" and displacement ventilation, are researched in an office building by fluent simulation software, the effect of the air distribution to the indoor environment can be obtained by analyzing the temperature and velocity distribution. Three physical models (10X20X2.75, widthX lengthX height, unit: m) with different air distribution are established in the research, the temperature field and velocity field are obtained by simulation. The results show that it is beneficial to creating a uniform temperature field and weakening the thermal discomfort caused by draught when the "upper supply and lower return" mode is applied in the office. However, the air vents in the lower part of the room need to be kept clean, otherwise the indoor air quality will be deteriorated, therefore, the selection of air distribution will lead to differences in the initial structure and economy.