Application of overhangs and side fins to high-rise residential buildings in Hong Kong

For a typical lone high-rise 20-storey residential building in Hong Kong, the extent to which cooling of its 10th-floor (mid-level) rooms depends on overhangs and side fins was evaluated. By using the software EnergyPlus™, it was found that the application of overhangs would reduce the electricity consumption by up to 5.3%. The highest reduction was obtained in rooms with windows unshaded by own-wing walls, face west, and have 0.75 m overhangs. By using the same software, it was found that the application of side fins to the building with overhangs would reduce the electricity consumption by up to 1.4%, where the highest values belong to windows facing either north or south (at west wing), with out-of-core side fins.

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