کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
78048 49315 2014 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Examination of the technical potential of near-infrared switching thermochromic windows for commercial building applications
ترجمه فارسی عنوان
بررسی پتانسیل فنی پنجره های ترموکرومیک سوئیچ نزدیک به مادون قرمز برای برنامه های تجاری
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
چکیده انگلیسی


• Scientists are working to develop near-infrared thermochromics with a low switching temperature.
• A parametric study was conducted to evaluate if this goal was appropriate for commercial buildings.
• A near-IR thermochromic was modeled with different ranges of switching temperature.
• Energy savings were greatest for the thermochromic with the lowest switching temperature range.
• NIR thermochromics with a low switching range are appropriate for commercial buildings.

Current thermochromic windows modulate solar transmission primarily within the visible range, resulting in reduced space-conditioning energy use but also reduced daylight, thereby increasing lighting energy use compared to conventional static, near-infrared selective, low-emittance windows. To better understand the energy savings potential of improved thermochromic devices, a hypothetical near-infrared switching thermochromic glazing was defined based on guidelines provided by the material science community. EnergyPlus simulations were conducted on a prototypical large office building and a detailed analysis was performed showing the progression from switching characteristics to net window heat flow and perimeter zone loads and then to perimeter zone heating, ventilation, and air-conditioning (HVAC) and lighting energy use for a mixed hot/cold climate and a hot, humid climate in the US. When a relatively high daylight transmission is maintained when switched (Tsol=0.10–0.50 and Tvis=0.30–0.60) and if coupled with a low-e inboard glazing layer (e=0.04), the hypothetical thermochromic window with a low critical switching temperature range (14–20 °C) achieved reductions in total site annual energy use of 14.0–21.1 kW h/m2-floor-yr or 12–14%1 for moderate- to large-area windows (WWR≥0.30) in Chicago and 9.8–18.6 kW h/m2-floor-yr or 10–17%2 for WWR≥0.45 in Houston compared to an unshaded spectrally-selective, low-e window (window E1) in south-, east-, and west-facing perimeter zones. If this hypothetical thermochromic window can be offered at costs that are competitive to conventional low-e windows and meet esthetic requirements defined by the building industry and end users, then the technology is likely to be a viable energy-efficiency option for internal load dominated commercial buildings.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solar Energy Materials and Solar Cells - Volume 123, April 2014, Pages 65–80
نویسندگان
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