کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7539841 1489003 2018 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental investigation on supercooling, thermal conductivity and stability of nanofluid based composite phase change material
ترجمه فارسی عنوان
بررسی تجربی بر روی بیش از حد حرارت، هدایت حرارتی و پایداری ماده تغییر فاز کامپوزیت مبتنی بر نانوفیلد
کلمات کلیدی
مواد تغییر فاز هدایت حرارتی، خنک نگه داشتن، تجمع، کلرید باریم دی هیدرات،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
چکیده انگلیسی
With increasing concerns over global warming, there is compelling need to apply energy technologies to improve energy efficiencies. One of the new technologies is the use of phase change materials (PCMs) to store energy and release it on demand. However, most of these materials undergo supercooling, aggregation and have low thermal conductivity that inhibits effective heat transfer. In this paper supercooling, stability, energy storage,thermal conductivity and latent heat of fusion of water based nanofluid of barium chloride dehydrate (BaCl2·2H2O) were experimentally studied by adding a mass fraction of 0.2 w.t%-1 wt.% magnesium oxide (MgO) and 0.2 wt.%-1 wt.% multi-walled carbon nanotubes (MWCNTs). Results show that by adding separately mass fraction of 1.% of MgO and MWCNTs reduce the supercooling degree of barium chloride dehydrate by 85% and 92% respectively. At the same mass fraction, thermal conductivity also improves by 6% on addition of MWCNTs and 17% on addition of MgO. However, the enthalpies reduce by 7% at 1 wt.% MgO and by 12.3% at 1 wt% MWCNTs. It was found that MgO exhibited relatively higher thermal conductivity and a lower reduction in latent heats at a mass fraction of 1 wt.%. Surfactant was also found to prevent aggregation at low temperatures.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Energy Storage - Volume 17, June 2018, Pages 47-55
نویسندگان
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