Siti Rabiah Binti Samsu
Metric No: BK10110276
Topic: Prediction of Window Temperatures for Indoor Thermal Comfort Analysis
Abstract: The project objectives are: (1) Investigating the heat transfer through window at the time of solstice (21st June, 21st December) and at the time of equinox (21st March, 21st September) and (2) To estimate and compare the window surface temperatures and heat gains based on glass thicknesses (2mm, 19mm) and frame types (aluminium, wood). The results of this study can be used as a benchmark to make the proper choice of glass types (clear glass with thickness of 2 and 19 mm) and frame materials of the window (aluminium and wood) for thermal comfort of the buildings. The scope of this work is more focused on predicting glass temperature in Kota Kinabalu, Sabah area. The required climatic data include hourly bulb temperature and hourly solar radiation. The type of glass is clear glass of 2 and 19 mm thicknesses. Two window frames are considered. These are wooden and aluminium frames. This study will focus on four orientations East, West, North and South. The selected dates for the predictions are 21st March, 21st June, 21st September and 21st December. The collected data will be analysed using Microsoft Excel as a tool to predict the window surface temperatures .The obtained and calculated data in this research are analysed and presented in graph and table. No experiment has been carried out in this research. It was concluded that, those glass windows which have 19mm glass thickness with wood frame types give the lowest value of surface window temperature (ts) and heat gain (Q) while the highest is the windows which having 2mm glass thickness with aluminium frame types. The 2mm glass thickness gave the highest surface temperature and heat gain to the window compare to 19mm glass thickness, whereas, it was observed that the wood frame types gave the lowest surface temperature and heat gain to the window compared to aluminium frame types. Overall average windows temperature was ranging from 26 to 30°C. The heat gain of a window values were varied linearly with the total transmittance of the glass windows due to solar radiation received at the window. The transmittance of the glass varied with the different thicknesses of the glass (2mm, 19mm).