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This study aims to optimize daylighting and reduce cooling loads in high-rise residential buildings by adjusting the setback distance between structures. Using parametric variations and simulations with EnergyPlus and Radiance, the study quantified the shading effects of neighboring buildings on annual cooling loads and spatial daylight autonomy (SDA). Four archetypal models with varying heights and orientations were analyzed to simulate different urban contexts in a warm humid climate. Two air conditioning (AC) scenarios were tested, revealing that optimal setback distances could reduce cooling loads by 2–3% in North and South orientations and 7–8% in East and West orientations for mid-level floors, while achieving a 75% SDA. The setback curves from simulations were validated through two case studies, demonstrating a 4–10% reduction in cooling loads when using the suggested setback values. The study’s recommended setback curves offer a practical approach to optimizing distances between high-rise residential buildings, contributing to energy efficiency and enhanced daylight access in the studied area.

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Simulating the Impact of Setback Regulations on Cooling Load and Daylight Access, in Residential Buildings in Warm Humid Climate

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  • 发表日期：

    2026年

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  • R. Ponrajalaxmi,
  • Kannamma Dorairaj

摘要

This study aims to optimize daylighting and reduce cooling loads in high-rise residential buildings by adjusting the setback distance between structures. Using parametric variations and simulations with EnergyPlus and Radiance, the study quantified the shading effects of neighboring buildings on annual cooling loads and spatial daylight autonomy (SDA). Four archetypal models with varying heights and orientations were analyzed to simulate different urban contexts in a warm humid climate. Two air conditioning (AC) scenarios were tested, revealing that optimal setback distances could reduce cooling loads by 2–3% in North and South orientations and 7–8% in East and West orientations for mid-level floors, while achieving a 75% SDA. The setback curves from simulations were validated through two case studies, demonstrating a 4–10% reduction in cooling loads when using the suggested setback values. The study’s recommended setback curves offer a practical approach to optimizing distances between high-rise residential buildings, contributing to energy efficiency and enhanced daylight access in the studied area.