INVESTIGATIONS OF THERMAL COMFORT AND AIR FLOW DISTRIBUTION IN NATURALLY VENTILATED LIVING ROOM WITH A CEILING FAN

In this paper, numerical analysis is used to investigate thermal comfort and airflow patterns in ventilated living rooms, including window openings and utilizing a ceiling fan. The air distribution in the living room was accurately predicted in this study using the CFD program. A five-bladed commercial ceiling fan is used to ventilate the room. The major goal of this study is to change the fan speed, fan height, and fan direction of rotation for the purpose of providing the thermal comfort conditions for individuals in the living room. Temperatures, velocities, the PPD index (Predicted Percentage Dissatisfied), and the PMV index (Predicted Mean Vote) distribution have all been taken into consideration while analyzing each case. The results showed that the best thermal comfort values are associated with fan placement in the center of the room at a height of 2.75 m from the floor at a rotational speed of 110 rpm. The overall level of thermal comfort is not significantly different whether downward-drive or upward-drive fans are used, but there is a substantial variation in the local level of thermal comfort in an occupied zone.