Numerical simulation on the prevention effect of the cold draft along the window in wintertime

This study is aimed to contribute to energy saving and to achieve the indoor thermal comfort by preventing the down draft along the window in building with less heating energy than the common equipment, e.g. FCU. Firstly for the counter along the perimeter equipped with the heat panel, the flow inlet, the flow outlet and the declined plate over the counter, the 2-D simulations of 64 cases with varying the configuration of the counter, the heat generation rate, etc. are executed. As the result, the heat panel with 25% less heat generation rate than the heat flux through the window can prevent the cold draft under the condition of the inlet width 8cm, the outlet width 8cm and the counter plate declined with the angle of 30 degree or more. Furthermore the executed simulation under 14 conditions  suggests the advantage of short-circuit phenomenon.