Regional performance targets for transparent near-infrared switching electrochromic window glazings

摘要: Abstract With building heating and cooling accounting for nearly 14% of the national energy consumption, emerging technologies that improve envelope performance have significant potential to reduce consumption. Actual savings from these will depend heavily upon their in diverse climate operational conditions. In many cases, early-stage research can benefit detailed investigation order develop thresholds identify target markets. One example, a dynamic, highly transparent, near-infrared switching electrochromic (NEC) window glazing, is focus this investigation. Like conventional electrochromics, NEC glazing dynamically tune its optical properties with small applied voltage. Consequently, block or transmit solar heat loads, respectively. Unlike glazings remain transparent visible light, causing no adverse effect daylighting aesthetics. This study utilizes software COMFEN simulate broad range levels, commercial residential buildings 16 climate-representative reference cities. These simulations are basis identifying levels necessary compete existing static technologies. results indicate strongly influenced by blocking-state performance. Additionally, applications lower requirements due characteristic internal gains. Finally, most dynamic level simulated competition high performing alternatives. Here 5 11 kWh/m2 yr 8–15 kWh/m2 yr residential, regions on 10%.