Thermal comfort in a mixing ventilated room with high velocities near the occupied zone

Experimental results in a testing room with mixing ventilation were used to define two new ways of designing the inlet airflow in order to ensure comfort. The first way uses the assumption that air velocities are only a function of the Archimedes number, which provides curves showing air velocity in the occupied zone as function of inlet air temperature and velocity. The second way results from an analytical calculation of the penetration length of the air jet in the room and the distance where it enters the occupied zone. Experimental results were also obtained with displacement ventilation. Comparison of comfort provided by mixing and displacement ventilation are given.