Draught Rate Assessment in a Ventilated Classroom, Based on One Hour-Long Records of Air Velocity and Air Temperature

This paper deals with the assessment of draught rate (DR) in a ventilated university classroom (field lab). Based on one hour-long measurements with a sampling rate of 5 Hz of both air velocity and air temperature under recirculation mode of operation of four ceiling fan coils, DR time variation at 27 space points is obtained. Two cases that have a strong impact on the flow pattern in the investigated space are considered: an empty room and a furnished room. Moving intervals with a length of 1 min, 3 min, and 15 min are used to calculate DR.