Sun as a clean energy source for lighting buildings Case Study: Daylighting Design in Tehran (Iran)

Abstract

By reducing the need for electric light, daylighting can substantially lower home energy use. However, excessive daylighting can increase both heating and cooling loads. A balanced approach to daylighting involves whole building design starting with the location and orientation of a home and continuing with proper room location and design, window sizing and placement, and selection of room finishes.

This study has shown that daylight factor is insensitive to both the prevailing climate and building orientation. The drive towards sustainable, low-energy buildings places increasing emphasis on detailed performance evaluation at the early design stage. Recent advances in lighting simulation techniques have demonstrated that reliable predictions founded on hourly climatic data are attainable. This paper describes the application of climate-based daylight modelling to Tehran's buildins.

:Keywards daylight factor, Climatic design, Tehran