کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4993872 1458027 2017 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of temperature and graphite particle fillers on thermal conductivity and viscosity of phase change material n-eicosane
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Effect of temperature and graphite particle fillers on thermal conductivity and viscosity of phase change material n-eicosane
چکیده انگلیسی
Organic materials like simple, long chain n-alkanes have high latent heat and find application as a phase change material (PCM). In this work, we measure the thermal conductivity, k, and viscosity, µ, of n-eicosane (C20H48) as a function of temperature, and examine the effect of homogenously dispersed graphite particles (GP) in the PCM. Our results show a large enhancement in k (450%) and µ (1200%) for a 3.5% vol. concentration of GP fillers. The surprising reduction of the interfacial thermal resistance (Reff) with increasing filler concentration, together with the high thermal conductivity of GP contributes to the large enhancement in k. Reff increases with temperature when n-eicosane is in solid phase and decreases after phase transition. The enhancement in µ is attributed to the layering of liquid n-eicosane at the graphene surfaces, and agglomeration of GP at higher concentrations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 114, November 2017, Pages 318-323
نویسندگان
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