Paper Conference

Proceedings of ASim Conference 2012: 1st Asia conference of IBPSA-China, Japan, Korea


Building shape optimization for sustainable building design part (1) investigation into the relationship among building shape, zoning plans, and building energy consumption

Kazuki Horikoshi, Ryozo OOKA, Jongyeon LIM

Abstract: To realize sustainable building design, improving energy efficiency by architectural passive design is essential at the conceptual design stage. At this stage, building shape such as building floor shape, arrangement, and orientation are important considerations in energy-saving building design because these variables have a significant impact on environmental performance (Flager, 2007¹⁾). Many scholarly studies concerned with building shape optimization and energy consumption have been conducted. However, most of these studies only considered building shape as mass volume, with little mention of the relationship between building zoning and energy consumption in optimization. In the design of concrete buildings, zone planning elements such as core arrangement, which has significant impact on building planning design, must be considered. As a goal of this study, we aim to develop a design method to provide valid reference data on building shapes, suggesting solutions to minimize building energy consumption. We developed a building energy calculation model coupled with a shape optimization program using a genetic algorithm. Using this, we optimized building shape and a zone plan for minimizing energy consumption for lighting and AC. With the calculation results, we confirmed the impact of such parameters on building operation energy. Pareto optimal solutions are distributed with different tendencies by core zoning. By the difference in core zoning plans, optimal shape solutions change in respect to window ratio and aspect ratio.
Pages: 38 - 45