Simulated and measured versus user’s satisfaction based daylighting evaluations, and Conformity Rectifications: A Case of Academic building in Lahore

Abstract

Buildings with daytime occupancy are more daylight-dependent. The allowance of controlled daylight through openings is necessary for such buildings. This research is based on daylighting analysis of an academic building in Lahore, Pakistan. The existing building of the Architecture Department at U.E.T, Lahore was selected as a case study for daylight illuminance levels testing against acceptable standard requirements. The current situation of the building is analyzed to provide the provision for improved and efficient lighting; that is based on the maximum utilization of daylighting i.e. between 8:00 - 15:00hrs. The comparative study conducted, used three analysis and evaluation methods i.e, virtual simulation using VELUX Daylight Visualizer, onsite measurements by LUX meter, and user’s responses recorded through a questionnaire, for the selected days and time. Existing low daylighting levels achieved are satisfactory for the users. This paper proposes a few modifications to achieve standard values. Comparative results were analyzed and conclusions are drawn based on improved surface values and glazing properties.