01784nas a2200157   4500008004100000050001400041245009500055210006900150260003100219520120900250100002101459700002101480700002301501700002701524856007501551       1996                        eng d  aLBL-3825200aThe Energy Performance of Electrochromic Windows in Heating-Dominated Geographic Locations0 aEnergy Performance of Electrochromic Windows in HeatingDominated  aFreiburg, Germanyc09/19963 a<p>This paper presents the results of a study investigating the energy performance of electrochromic windows in heating-dominated geographic locations under a variety of state-switching control strategies. We used the DOE-2.1E energy simulation program to analyze the annual heating, cooling and lighting energy use and performance as a function of glazing type, size, and electrochromic control strategy. We simulated a prototypical commercial office building module located in Madison, Wisconsin. Control strategies analyzed were based on daylight illuminance, incident total solar radiation, and space cooling load. Our results show that overall energy performance is best if the electrochromic is left in its clear or bleached state during the heating season, but controlled during the cooling season using daylight illuminance as a control strategy. Even in such heating dominated locations as Madison, there is still a well-defined cooling season when electrochromic switching will be beneficial. However, having the electrochromic remain in its bleached state during the winter season may result in glare and visual comfort problems for occupants much in the same way as conventional glazings.</p>1 aSullivan, Robert1 aLee, Eleanor, S.1 aRubin, Michael, D.1 aSelkowitz, Stephen, E.  uhttps://facades.lbl.gov/publications/energy-performance-electrochromic