ENERGY PERFORMANCE DESIGN OPTIMIZATION OF ENVELOP CONFIGURATION After finalising the building form and zoning, the building envelope options were reviewed. Thin, open plans allowed us to arrange a multitude of options for wall layers, as per specific spatial requirements. The final material palette was selected based a cross analysis of the best energy performance and affordability.
Fig 28. Wall assembly impact on EUI with cost
The Window-Wall ratio (WWR) was varied for each cardinal direction, as the building is oriented along the East-West direction and North light is favoured for office working spaces. The minimum WWRs are used in the West and South direction, to compensate the harsh sun on the sides. The ratios are simulated to make sure ample daylight peers in the spaces.
Table 6. Envelope configuration
Fly ash based AAC is used as the major masonry material to utilise the large amounts of concrete construction by-product present in the city and Rockwool is used for insulation. It is made from naturally occurring basalt rock found within 100km of the site and recycled slag. It is efficient and durable. Thereby, embodied energy is reduced by 38% as compared to EDGE base case simulation of office building data. Fig 29. Embodied Energy Reduction 16
