DL Abacus- A simplified simulation-based tool for daylighting performance assessment in Brazilian dwellings (original) (raw)

Building Simulation Conference Proceedings

The Brazilian National Standard for the assessment of residential buildings' performance presents limitations regarding metrics and methods recommended for daylight assessments. This paper presents the proposed updates for the standard, along with the development of a simplified simulation-based tool-DL Abacus-. The spatial Daylight Autonomy of 36,000 parametric cases was obtained through CBDM simulations. The abacuses were developed based on the most restrictive cases meeting the proposed targets. We developed a set of 9 abacuses, separated by latitude and visible transmittance. The tool will be useful for the standard application, especially in low-budget projects and remote regions of the country. Key Innovations  The developed set of DL Abacus has been included in the Daylighting chapter of the Brazilian National Standard for the assessment of residential buildings' performance (ABNT NBR 15.575).  For the definition of the level of performance, our proposal uses a range of fraction target instead of different illuminance targets. Thus, the whole process of assessment (through the DL Abacus or simulation) would be optimized. Practical Implications The proposed DL-Abacus will reach a broader public, thanks to a simplified method that uses, as input, architectural variables to verify the daylight performance in dwellings. This tool will allow quick filtering of those spaces that do not meet the required criteria.