Abstract
In tropical climes, the roof is the building envelope component that gets the most solar radiation. Heat gain and heat loss through the roof substantially impact the comfort of occupants on the uppermost floors. While roof shading with a canopy over the roof is thought to be beneficial for obstructing direct solar radiation on the roof, night sky radiation from the roof is diminished, hence increasing the thermal stress on the top level. This study aims to determine the effect of automated shade with two separate day and nighttime schedules, which reduces heat gain during the day while allowing nocturnal radiative cooling. The analysis is conducted for a low-rise representative building by altering the roof shading levels between day and night using the whole building energy simulation tool ‘DesignBuilder’. Six cases were formulated and simulated for Kolkata, the representative city for India’s warm humid climate. The results suggest that automated roof shading reduces energy consumption significantly when compared to bare roofs and roofs with fixed shade. It is observed that the roof with less insulation and automated shading achieves better thermal performance compared to all other combinations studied.
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Sadevi, K.K., Agrawal, A. (2023). Impact of Automated Roof Shading on Building Energy Performance in Warm and Humid Climates of India. In: Gaspar, F., Mateus, A. (eds) Sustainable and Digital Building . Springer, Cham. https://doi.org/10.1007/978-3-031-25795-7_25
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DOI: https://doi.org/10.1007/978-3-031-25795-7_25
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