Daylighting in Density: A Parametric Study of High-Rise Residential Buildings and Urban Street Canyon Configurations in Dhaka, Bangladesh
This research presents an analysis of daylighting ingress relating to urban street canyon configurations of high-rise residential buildings in the dense urban context of Dhaka, Bangladesh. A computational workflow is used to investigate the impact of building and street canyon geometry on daylight autonomy in high-rise residential buildings. First, an analysis of a case example in Dhaka, Bangladesh, shows the challenges of daylighting in deep spaces in high-rise building conditions. Then, several identified residential building typologies in Dhaka, Bangladesh, are analyzed concerning how varied geometry of these typologies and width of urban street canyons impact daylight ingress. The key aspects to analyze daylight autonomy in this study are building geometry, surrounding obstructions, orientation, and urban street configurations. These are computationally analyzed and visualized utilizing the software packages Rhinoceros and Grasshopper, and the environmental plugins Honeybee and Ladybug. Comparing daylight autonomy levels that result from varying those aspects mentioned above in the simulation helps us understand the impact each aspect makes in high-rise residential buildings in the dense urban context of Dhaka. Finally, recommendations for new configurations of residential buildings related to the adjacent urban canyon are given as daylighting design strategies based on the parametric investigation of the impact and efficacy of a residential block geometry.
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