کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6689164 | 501889 | 2014 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Preparation of nitrogen-doped graphene/palmitic acid shape stabilized composite phase change material with remarkable thermal properties for thermal energy storage
ترجمه فارسی عنوان
آماده سازی نانو ذرات گرافن / اسید پالمیتیک اسید تثبیت شده مواد کامپوزیت تغییر فاز با خواص حرارتی قابل توجهی برای ذخیره انرژی حرارتی
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کلمات کلیدی
گرافن، مواد تغییر فاز، ذخیره انرژی حرارتی، هدایت حرارتی، حرارت نهان،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
مهندسی انرژی و فناوری های برق
چکیده انگلیسی
Palmitic acid (PA) is one of the main phase change materials (PCMs) for medium temperature thermal energy storage systems. In order to stabilize the shape and enhance the thermal conductivity of PA, the effects of adding nitrogen-doped graphene (NDG) as a carbon nanofiller were examined experimentally. NDG was dispersed in liquid PA at various mass fractions (1-5 wt%) using high power ultrasonication. The dropping point test shows that there was clearly no liquid leakage through the phase change process at the operating temperature range of the composite PCMs. The thermal stability and thermal properties of composite PCM were investigated with a thermogravimetric analyzer (TGA) and differential scanning calorimeter (DSC), respectively. The thermal conductivity of the PA/NDG composite was determined by the laser flash method. The thermal conductivity at 35 °C increased by more than 500% for the highest loading of NDG (5 wt%). The electrical conductivity of composite PCMs was increased significantly by using NDG. The thermal cycling test proved that the PA/NDG composites PCMs had good thermal reliability and chemical durability after 1000 cycles of melting and freezing. The thermal effusivity of the PA/NDG composite PCMs was larger than that of pure PA, which is advantageous for latent heat thermal energy storage (LHTES).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Energy - Volume 135, 15 December 2014, Pages 339-349
Journal: Applied Energy - Volume 135, 15 December 2014, Pages 339-349
نویسندگان
Mohammad Mehrali, Sara Tahan Latibari, Mehdi Mehrali, Teuku Meurah Indra Mahlia, Emad Sadeghinezhad, Hendrik Simon Cornelis Metselaar,