EFFECT OF ADJACENT SHADING ON BUILDING ENVELOPE HEAT GAIN IN TROPICAL CLIMATE
Received: 10th June 2025, Revised: 20th June 2025, 10th July 2025, Accepted: 2nds August 2025, Date of Publication: 11th September 2025
DOI:
https://doi.org/10.20319/mijst.2025.11.2842Keywords:
Interblock Shading, Solar Radiation, Thermal Performance, Overall Thermal Transfer ValueAbstract
In tropical regions, approximately 60% of building energy is consumed by cooling systems, with heat gain through the building envelope being a major contributor. The Overall Thermal Transfer Value (OTTV) is a metric used to quantify average heat gain in air-conditioned buildings. However, the standard OTTV calculation does not account for shading from adjacent buildings—an increasingly common feature in high-density urban areas. This paper presents an empirical study on the thermal performance of building envelopes considering adjacent shading in tropical climates. Dynamic simulations of annual heat gain were conducted for buildings with and without adjacent shading for comparative analysis. The results highlight the significant impact of adjacent structures on heat gain performance and offer supplementary data to improve the current OTTV calculation method, especially for multi-block developments.
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