Multi-Objective Optimization
2024
The aim of this research is to optimize facade elements of an office project. Due to conflicting site conditions, the office portion of the project was located on the south facade of the building - as a result of this, a multi-objective methodology was utilized to achieve the least amount of solar radiation on the south-facade of the building while maximizing sunlight exposure and views to the outside.
Method
A multi-objective optimization workflow is implemented in this research's parametric exercise. This workflow addresses multiple conflicting objectives and parameters and produces effective solutions that leverage the desired elements.
Parameters and Objectives
The parameters that this study evaluates are the depth of the vertical fins, and the spacing of them. Three categories were considered for the depth of the vertical fins - ranging from 75mm-400mm, and all were studied with regards to various spacing distances.
The objectives that this study evaluates are:
Solar radiation: to maximize solar radiation on the facade.
Percentage view factor: to maximize the percentage of the sky visible from the office space.
Sunlight hours: to maximize the amount of direct sunlight received.
Cost: to optimize cost by calculating the areas of shading elements.
The study produced roughly 2700 solutions - of which an optimal range was considered as shown below. The team then considered the solutions with reference to performance as well as aesthetic considerations in order to make a design selection.
