کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4918873 1428935 2017 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Evaluation of thermochromic elastomeric roof coatings for low-slope roofs
ترجمه فارسی عنوان
ارزیابی پوشش های سقف الاستومری سدیم ترموکروم برای سقف های کم شیب دار
کلمات کلیدی
سقف حرارتی، سقف سرد، ساختمان پایدار، سقف هوشمند،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
چکیده انگلیسی
Thermochromic elastomeric roof coatings for low-slope roofs were prepared by incorporating a commercial thermochromic dye (with transition temperature, Tc ∼ 32 °C) into a white acrylic elastomer matrix. Freshly applied coatings showed an initial temperature-dependent solar reflectance change of 22-25%, with a maximum solar reflectance of 70% in the colorless state (T > Tc). Weathering studies revealed that these thermochromic coatings undergo irreversible photodegradation in as little as 96 h of accelerated aging. Attempts to protect thermochromic dyes with inorganic (nano-ZnO) or organic (Lowilite® 20S) UV absorbers were partially successful but need significant improvements to achieve the required lifetime of at least 10 years. Cost calculations in three different geographies showed that even if the durability of these coatings is greatly improved, the energy savings relative to the incumbent static cool roofs are small and do not currently justify the additional cost of thermochromic pigments and UV absorbers.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy and Buildings - Volume 155, 15 November 2017, Pages 459-466
نویسندگان
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