Abstract
In the tropics, when the temperature is hot and humid, the roof, as the topmost part of a building, becomes the most overheated surface. This is due to the high amount of total solar irradiance I(HTCS) received on the roof surface. Mosque typology was chosen for this study since it evolved over time with many roof geometries and styles. Traditionally, pyramidal roofs were used in pre-colonial era, while domes were applied during British colonization in the seventeenth and eighteenth centuries.
Despite this, there is a paucity of knowledge on the potential of roof geometry and orientation in reducing total amount of solar irradiance received on the roof surface. It leads to the roof geometry selection merely due to its aesthetic value rather than a solution for energy conservation and environmental sensitivity.
This chapter is focusing on examining the influence of solar altitude and surface azimuth angles of mosque roof geometries and orientation on the amount of solar irradiance I(HTCS) received on the roof surfaces. Solar performance of different mosque roof geometries, namely, single-tier roof, double-tier roof, half dome, pointed dome, and bulbous dome solar, using solar radiation simulation model (SRSM) were simulated, compared, and evaluated.
The data revealed that the bulbous dome roof geometry provided the most significant outcome in terms of receiving the quantity of solar irradiance I(HTCS) on its roof surface as compared to other roof geometries in Malaysia. This is due to majority of the roof surface segments having high tilted angle value which received lower amount of solar irradiance I(HTCS). This topic discovers the impact of various mosque roof geometries in receiving the amount of solar irradiance I(HTCS) on the roof surfaces, which has a direct impact on heat gain thus affecting energy consumption for cooling. It is, therefore, the selection of appropriate roof geometry in the tropics is one of the best passive design strategies to achieve indoor thermal comfort by natural mean.
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Adam, M., Ab Ghafar, N. (2022). Passive Solar Design: The Influence of Building Geometry and Orientation on Solar Performance of Mosque in the Tropics. In: Sayigh, A. (eds) Achieving Building Comfort by Natural Means. Innovative Renewable Energy. Springer, Cham. https://doi.org/10.1007/978-3-031-04714-5_10
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DOI: https://doi.org/10.1007/978-3-031-04714-5_10
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