Impact of French windows on indoor thermal environment in warm air heating rooms

Warm air floating upward leads to the large temperature gradient in heating room, which is unfavorable for both the thermal comfort of occupants and energy utilization of warm air. In the rooms with large area of French windows, the air near the windows is cooled by convective heat transfer and then sinks, which causes a larger temperature gradient. Tests the warm air heating effect of this kind of room in the environmental chamber, and analyses the space distribution characteristics of indoor temperature, air flow and thermal comfort index with air supply ways of roof-attachment jet and non-roof-attachment jet under different air supply parameters. Indicates that thermal comfort satisfaction in the mixed ventilation heating room does not monotonically change with the variation of air supply parameter, and the optimal parameter can be obtained.