ASSESSING DAYLIGHTING PERFORMANCES OF ELECTROCHROMIC GLAZINGS COUPLED TO AN ANIDOLIC DEVICE

摘要

New daylighting technologies, based on non-imaging optics (anidolic daylighting systems), have demonstrated their capability to increase substantially daylight penetration within deep office rooms. Despite these potential benefits, a successful integration of daylighting and building services equipment have to meet human needs regarding both thermal and visual comfort to provide effective energy savings. This objective was directly addressed by coupling electrochromic glazings to an anidolic device in order to achieve a better control of the light flux generated by the daylighting system (variable transmission factor), complemented by the flux produced by electric lighting fixtures (continuous dimming). The design of this device, carried out through numerical simulations (ray-tracing technique) and its integration to the southern “sustainable façade” (wooden construction, passive solar and daylighting technologies) of the LESO solar experimental building, are presented in this communication. Results of the experimental assessment of the device’s thermal and visual performances are shown as well as an evaluation of the office’s integral comfort. Both results are compared with those achieved in an identical office room, equipped with conventional solar blinds and building services (reference room).