TY - JOUR T1 - Split-pane electrochromic window control based on an embedded photometric device with real-time daylighting computing JF - Building and Environment Y1 - 2019/08// SP - 106229 A1 - Yujie Wu A1 - Taoning Wang A1 - Eleanor S. Lee A1 - Jérôme H. Kämpf A1 - Jean-Louis Scartezzini KW - daylighting KW - electrochromic KW - Embedded Controller KW - HDR KW - windows AB - Well-designed electrochromic (EC) glazing control can improve the energy performance of buildings and visual comfort of occupants in highly glazed buildings. This paper designed and demonstrated a compact integrated EC glazing automation system to control tint states of a split-pane EC window according to variations of sky conditions. The control is based on monitoring the luminance distribution of the sky and real-time lighting computation for a building interior, using an embedded photometric device (EPD). It optimizes tint states of EC glazing to offer sufficient daylight provision and temper discomfort glare for occupants, which potentially mitigates excessive solar heat gain. ’In-situ’ experiments were conducted in a full-scale testbed to demonstrate the daylighting performance under various sky conditions. Experimental results showed 83% of the working time for work-plane illuminance (WPI) and 95% of the time for daylight glare probability (DGP) were constrained in comfort range (WPI∈[500, 2000] lux, DGP ≤ 0.35) by the automated EC glazing (controlled by EPD) under clear skies; 68% of the time for WPI and 94% of the time for DGP in confined range under clear skies with thin clouds; 62% of the time for WPI and 85% of the time for DGP in confined range under partly cloudy skies. VL - 161 UR - https://linkinghub.elsevier.com/retrieve/pii/S0360132319304391 U2 - LBNL-2001231 JO - Building and Environment DO - 10.1016/j.buildenv.2019.106229 ER -