Reducing soak air temperature inside a car compartment using ventilation fans

This article presents an investigation on the effects of using ventilation fans on the air temperature inside a car passenger compartment when the car is parked under the sun. it was found from a measurement that the air temperature inside the passenger compartment could raise up to 48�c. computational fluid dynamics method was used to develop model of the compartment and carry out flow simulations to predict the air temperature distribution at 1 pm for two conditions: without ventilation fans and with ventilation fans. the effects of fan location,number of fans used and fan airflow velocity were examined. results of flow simulations show that a 17% temperature reduction was achieved when two ventilation fans with airflow velocity of 2.84 m/s were placed at the rear deck. when three fans were used,an additional 3.4% temperature reduction was attained. placing two ventilation fans at the middle of the roof also reduced the air temperature by 17%. when four fans were used a further 4.8% temperature reduction was achieved. increasing the airflow velocity at the four fans placed at the roof,from 2.84 m/s to 15.67 m/s,caused only a small reduction in the air temperature inside the passenger compartment. � 2016 penerbit utm press. all rights reserved.