Optimum external shading system for counterbalancing glare probability and daylight illuminance in Sydney's residential buildings

Purpose Optimisation of daylight admission through window is crucial for alleviating glare while maintaining useful levels in order to enhance occupants' health, visual comfort and moderating lighting energy consumption. Amongst various solutions, fixed external shade an affordable solution housing spaces that need be sophisticatedly designed, especially during the period increasing home as working environments. In humid subtropical region, control plays important role indoor comfort, particularly with areas a high wall ratio (WWR). Due insufficient amount such study on non-office Australia, shading-related standards are not addressed Australian building codes. Design/methodology/approach The chosen methodology research quantitative data collection analysis field measurement simulation simultaneously. first step multi-objective optimisation shading elements non-dominated sorting genetic algorithm (NSGA-II) parametric modelling via Rhino3D CAD engines (DIVA ClimateStudio). second phase, Pareto front solutions validated by experimental measurements within room single north-facing (the most probable daytime Sydney) seven common local configurations. Findings Through ten genes, 1,560 values 2.4 × 1,019 search space, this found optimum each layout, resulted +22% (UDI) −16% views discomfort average. Moreover, all-purpose polygonal showed average 4.6% increase UDI 5.83% decrease percentage glare. Research limitations/implications findings subject dimensions, dimensions layouts, orientation windows selected residential buildings Sydney. Originality/value contributes development highly accurate systems rectangular tapered-form shapes. A real-time luminance-metre sensors HQ cameras located at six eye conducted corroborate results comfort.