Paper Conference

Proceedings of ASim Conference 2016: 3rd Asia conference of IBPSA-China, Japan, Korea


Multi-objective optimization of building facade design strategies

R. Shan, T. Shi

Abstract: Achieving optimal solutions to design high-performance building façade is a challenging task at the early design stage, since a huge number of facade design variables have to be implemented in a comprehensive framework. The life cycle cost (LCC) and indoor comfort are essential optimization constraints but often conflict with each other. In this study, an efficient, transparent and time-saving optimization method is implemented to improve a two-floor office building's façade in the severe cold climate of China. Facade design variables such as insulation, window-to-wall ratio (WWR), and glazing types are explored. Useful daylight illuminance (UDI) and life cycle cost (LCC) were applied as design objectives. A stochastic population-based and multi-dimensional optimization technique of Strength Pareto Evolutionary Algorithm-II (SPEA-II) is utilized for searching the optimization space. The lighting simulation program Radiance and energy simulation program EnergyPlus are integrated with this optimization tool to compute the optimal solutions. The optimization results validate the potential to maintain low LCC and achieve high UDI value.
Keywords: Multi-objective optimization, UDI, Life cycle cost, Façade design strategy