1247 Lightwell in residential building: Architectural solutions to the daylighting performance through parametric simulation

Authors

  • João Pedro de Melo Souza Federal University of Juiz de Fora, Faculty of Architecture and Urbanism, Graduate Program of Built Environment, José Lourenço Kelmer Street, 36036-110 – Juiz de Fora, Brazil https://orcid.org/0000-0002-1539-1695
  • Klaus Chaves Alberto Federal University of Juiz de Fora, Faculty of Architecture and Urbanism, Graduate Program of Built Environment, José Lourenço Kelmer Street, 36036-110 – Juiz de Fora, Brazil https://orcid.org/0000-0003-2845-8307
  • Sabrina Andrade Barbosa Federal University of Juiz de Fora, Faculty of Architecture and Urbanism, Graduate Program of Built Environment, José Lourenço Kelmer Street, 36036-110 – Juiz de Fora, Brazil; State University of Rio de Janeiro, Department of Architecture and Urbanism, Ipiranga Avenue, 544, Centro, 25610-150 – Petrópolis, Brazil https://orcid.org/0000-0002-4129-5541

Keywords:

lightwell, daylighting, wall reflectance, built environment, parametric simulations

Abstract

The lightwell is an architectural solution to promote daylight into the internal spaces from the core of a building. The shaft configurations, such as geometry and reflectance can affect the performance of the daylighting entering the adjoining rooms under different conditions. This study aims to indicate the adequate architectural solutions to improve the daylighting performance of buildings with lightwells at three different southern latitudes. From a base model of 6-stories building, alternative cases were parametrically simulated using Rhinoceros, GrassHopper and ClimateStudio software. From variations in the lightwell geometry and walls reflectance, the cases were analyzed considering the lighting metrics UDI and sDA300. Results demonstrate that the daylighting is adequate on the floors near the top of the building and weakens towards the base of it. In Macapá, São Paulo and Chile, the sDA values reach 100 % on the top floor, but only 3 % on the first floor. It was also observed that materials with high diffuse reflectance on the shaft is more efficient in improving the daylighting performance than increasing its geometry. This research presents early-design guidance to inform architects and policymakers when considering the exploitation of daylight by the use of the lightwell.

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Published

2022-12-21

How to Cite

Souza, J. P. de M., Alberto, K. C., & Barbosa, S. A. (2022). 1247 Lightwell in residential building: Architectural solutions to the daylighting performance through parametric simulation. Acta Polytechnica CTU Proceedings, 38. Retrieved from https://ojs.cvut.cz/ojs/index.php/APP/article/view/8476