Experimental validation of simulation software for daylight evaluation in street canyons (WIP)

摘要

New tools for the evaluation of daylight availability at the urban scale have been recently developed. This paper describes a methodology to assess the accuracy of three of them: Citysim, Daysim and Heliodon. We designed a moveable scale model representing an idealized street canyon. The geometry of the canyon and the materials used for the facades can easily be changed. Illuminance sensors have been placed on the facades and on the ground in the middle section of the canyon. The model is located on the roof of our laboratory. Measured illuminances for various combinations of canyon geometry, orientation, facade reflection factors and sky types will be compared to illuminances computed by each simulation tool for the same combination of parameters using data collected from an onsite daylight measuring station as input weather file. At the end of the project, we will be able to provide recommendations regarding the accuracy of these three simulation tools.