The Effect of Passive Shading Strategies on Cooling Load Reduction in a Three-Story Office Building in West Bandung Regency
Abstract
Office buildings in humid tropical climates tend to have high energy
consumption, with cooling loads representing one of the major
components, particularly in existing buildings that were not originally
designed with adequate solar radiation control. This study examines
the effect of passive shading strategies on reducing cooling loads in an
existing office building through a building energy performance
simulation approach. The case study focuses on the PT. Sipatamoda
Indonesia office building in West Bandung Regency, which
accommodates both office and exhibition functions. The building has a
total floor area of 1,024.4 m² and is predominantly occupied by
daytime activities. The research employed performance-based
simulation using the Sefaira plugin by comparing two scenarios, the
existing building without passive shading and the building with a
combined passive shading strategy incorporating horizontal and
vertical elements. The analysis focused on annual cooling energy
demand and Energy Use Intensity (EUI). The simulation results indicate
that the combined passive shading strategy reduces cooling energy
compared with the existing condition, consequently lowering the
building’s annual EUI. This reduction is associated with decreased solar
radiation entering through the openings, thereby reducing the cooling
load imposed on the air conditioning system. The findings demonstrate
that combined passive shading can provide a measurable contribution
to improving the energy efficiency of existing office buildings without
requiring structural modifications, making it a suitable nonstructural
intervention for office buildings in humid tropical climates.
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