02807nas a2200253 4500008004100000022001300041245012200054210006900176260001200245300001100257490000800268520202500276653001602301653001902317653002402336653000802360653001202368100001402380700001802394700002102412700002502433700002802458856006702486 2019 eng d a0360132300aSplit-pane electrochromic window control based on an embedded photometric device with real-time daylighting computing0 aSplitpane electrochromic window control based on an embedded pho c08/2019 a1062290 v1613 a

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.

10adaylighting10aelectrochromic10aEmbedded Controller10aHDR10awindows1 aWu, Yujie1 aWang, Taoning1 aLee, Eleanor, S.1 aKämpf, Jérôme, H.1 aScartezzini, Jean-Louis uhttps://linkinghub.elsevier.com/retrieve/pii/S0360132319304391