کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6731059 | 504024 | 2015 | 19 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Shape-stabilized phase change materials based on fatty acid eutectics/expanded graphite composites for thermal storage
ترجمه فارسی عنوان
مواد تغییر فاز با ثبات شکل بر اساس ائتکتیک اسید چرب / کامپوزیت گرافیت گسترش یافته برای ذخیره سازی حرارتی
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کلمات کلیدی
مواد تشکیل دهنده فاز ثبات شکل، گرافیت گسترش یافته، نقطه ذوب پایین، ذخیره انرژی حرارتی، هدایت حرارتی،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
چکیده انگلیسی
Despite the well-known properties of organic phase change materials (PCMs), drawbacks including high phase transformation point, fluid leakage, and low thermal conductivity limit their practical applications. In this study, a kind of PCMs with low melting point (below 25 °C) was prepared using capric and lauric acid as substrates with additive oleic acid (C-L-O acid). C-L-O acid was then impregnated into worm-like expanded graphite (EG) to form the shape-stabilized PCMs (SPCMs) without any chemical reaction. EG was used to be not only a heat transfer intensifier, but also a shape-stabilized container for C-L-O acid. The melting enthalpy (ÎHm) of the SPCMs (mass ratio of EG to C-L-O acid was 1:35) was calculated to be 114.65 J/g, which was extremely close to the value of original C-L-O acid (115.91 J/g). The thermal conductivity of the SPCMs (1:5) was measured to be 3.15 W/m K, which was 22.5 times higher than that of original acid (0.14 W/m K). The SPCMs also showed good thermal reliability after thermal treatment cycles measurements. With consideration of latent heat and thermal conductivity, the SPCMs (1:15) were eventually selected as the optimal SPCMs with their ÎHm of 109.18 J/g and thermal conductivity of 1.95 W/m K. These composite SPCMs can be easily mass prepared and further used as potential materials for practical radiant cooling system.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy and Buildings - Volume 109, 15 December 2015, Pages 353-360
Journal: Energy and Buildings - Volume 109, 15 December 2015, Pages 353-360
نویسندگان
Xuehui Tang, Bei Zhu, Minghan Xu, Wei Zhang, Zhi Yang, Yafei Zhang, Guilin Yin, Dannong He, Hao Wei, Xiaoqiang Zhai,