A STUDY ON THE NATURAL VENTILATION PERFORMANCE OF A TURBINE VENTILATOR FOR HOUSES

Abstract

This study examined the natural ventilation performance of a turbine ventilator used for the attic or the room ventilation in South-east Asian houses by the experiment. The turbine ventilator began to rotate by the outdoor wind velocity more than 0.7m/s, and the ventilation rate increased with outdoor wind velocity, but the countercurrent was observed from the turbine ventilator to the ventilation object space when the outdoor wind velocity was under 0.7m/s or the turbine ventilator was fixed. If the opening size of ventilation object space became big, the ventilation rate increased with outdoor wind velocity, but the ventilation rate did not increase even if outdoor wind velocity increased when it was more than a certain size. When the turbine ventilator was separated from an obstacle more than 1.7m, it did not affect ventilation rate regardless of the position of the obstacle.