Comparison of heat transfer of the vinyl ceiling to the gypsum ceiling

Abstract

The objective of this research is to study the effect of heat transfer through the house by using the ceiling made of vinyl material compared with the gypsum ceiling. The results of heat transfer through the ceiling into the house were analyzed by convection method and material exothermic behavior during the day and night. Two houses were built for experiments. Each house has a room size of 1 m x 1 m x 1m. Both houses thatched with corrugated concrete roof tiles. The attic did not attach the insulation and the angle of the roof was declined 30º. The experimental results showed that the attic temperature indicated in the range of 43.7-44ºC. Obviously, the upper side and lower side of the vinyl ceilings were higher than gypsum ceilings during the day at 0.42ºC and 0.65ºC. However, the upper side and lower side of the vinyl ceilings at night showed averaged temperatures lower than gypsum ceilings at 1.15ºC and 1.1ºC. The room temperature of the test house was lower than the reference house during the night at 0.8ºC. The convective heat transfer value of vinyl ceilings was 2.37 W/m²K which higher than the average gypsum ceiling throughout the day and lower than the gypsum ceiling at night 1.81 W/m2K. The value of heat transfer using the heat flux sensor for measuring. It was found that the exothermic of the vinyl ceiling during the night was higher than the gypsum ceiling about 1.64 W/m².