Paper Conference

Proceedings of BSA Conference 2015: Second Conference of IBPSA-Italy


Daylighting optimization for informal settlements in Cairo, Egypt

Ayman Wagdy, Ahmed Abdelghany, Mohamed Amer Hegazy

Abstract: In developing countries, the phenomenon of informal settlements has increased significantly. For instance, Cairo is considered to have four out of the thirty biggest “mega-slums” in the world, with a total of 11.8 million inhabitants. These settlements occupy 62% of the Greater Cairo area. Sustainable development is urgently needed to ensure better quality of life for now and the following generations. One of the characteristics of informal settlements is having narrow streets and dense urban fabric. Thus, only a small amount of natural lighting enters indoor spaces, which has adverse effects on the physical and psychological health of the inhabitants. This paper aims to identify the most reasonable window ratios in relatively narrow street widths (4, 6 and 8 meters) based on the amount of light reaching the ground floor levels. This paper utilizes brute force procedure based on daylighting performance criterion. The parametric daylighting simulations were conducted using the Diva-for-Rhino, a plug-in for Rhinoceros 3D modeling software, which is used to interface Radiance and Daysim daylighting simulation engines. For the parametric tool, Grasshopper was used to generate the parametric urban model based on a generic case study taken in Cairo, Egypt. This paper presents quantitative results and measurements aiming to help decision makers address development strategies for informal settlements and to provide essential data for setting regulations for newly built urban spaces.
Pages: 483 - 490