The thermal performance of the building envelope is mainly required for guaranteeing a comfortableand hygienic interior climate. A roof is a part of the building envelope which provides protection from thethermal damage of the sun. To improve this protection ability, we can consider using a ventilated roof,which has a ventilation layer known as a cavity, beneath the roof cover panel.The objective of this study is to evaluate the influence of such factors as the slope of the roof, size orshape of the openings (i.e. inlet or outlet), effective cross section and cavity depth on the improvementof the air flow in the cavity for better thermal performance of the ventilated roof. In this study, theinfluence on air flow which is caused by the characteristics of these elements is researched. Theevaluations are carried out by way of experiments.
AN EXPERIMENTAL STUDY ON AIRFLOW IN THE CAVITY OF A VENTILATED ROOF
The 6th International Conference on Indoor Air Quality, Ventilation & Energy Conservation in Buildings IAQVEC 2007, Oct. 28 - 31 2007, Sendai, Japan