Conductive heat transfer for opaque roofing material at different pitch angle in Malaysia / Nur Amira Suid

Conductive heat transfer is one of the modes of the transfer of heat through a material. This refers to heat gains and losses into and from the building. This is an empirical study on conductive heat transfer for opaque roofing material at different pitch angles in Malaysia. The aims of this study are to measure the surface temperature of opaque roof for different pitch angles, to calculate conductive heat transfer of opaque roof at different pitch angle, and also to evaluate the relation between conductive heat transfer of opaque roof at different pitch angle. Data were obtained via field experiments done on the campus of UiTM in Shah Alam. In the experiment, two types of opaque roofing material were used which are galvanized iron and asbestos. The sample material was assembled at a three-pitch angle of0°, 25°, and 45°. Data were simultaneously collected for the three-pitch angles for material1 and it was then repeated for material 2. Temperatures of the upper and lower surfaces of the sample materials were measured using thermocouple type T and logged on datalogger DT80. Data were recorded at an interval of 1o min for a duration of three days. Conductive heat flux was calculated to use Fourier's Law. The conductive heat flux for galvanized iron is 938.82kWm2, 900.62kWm2, and 612.32kWm2 for pitch angle 0°, 25°and 45° respectively that for asbestos 4648.0lWm2, 3947.0Wm2 and 3537.95Wm2 for pitch angle 0°, 25°, and 45° respectively. It concluded that at 45° the conductive heat flux is lower compared to the other pitch for both materials.