کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8074337 | 1521451 | 2016 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermal performance enhancement of palmitic-stearic acid by adding graphene nanoplatelets and expanded graphite for thermal energy storage: A comparative study
ترجمه فارسی عنوان
افزایش عملکرد حرارتی اسید پالمیتیک-استاریک با افزودن نانوپلاستیک های گرافن و گرافیت گسترش یافته برای ذخیره انرژی حرارتی: یک مطالعه مقایسه ای
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کلمات کلیدی
مواد تغییر فاز نانولوله های گرافن، گرافیت گسترش یافته، هدایت حرارتی، خواص حرارتی،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی (عمومی)
چکیده انگلیسی
The effects of adding GnPs (graphene nanoplatelets) (nanoscale) and EG (expanded graphite) (microscale) were investigated to improve the thermal performance of PA-SA (palmitic-stearic acid) eutectic mixture as a PCM (phase change material). Carbon materials were dispersed into PA-SA with loadings of 1wt%, 2wt%, 4wt%, and 8wt%. The thermal properties measurement results show that the phase change latent heats of composite PCMs decreased with increasing loadings. The thermal conductivities of the composite PCMs were measured by the transient plane heat source method. Both GnPs and EG can effectively improve the thermal conductivity of PA-SA, but EG is more effective due to its worm-like structure. For the highest loading (8wt%), the thermal conductivity of the composite PCMs is 2.7 times higher with GnPs and 15.8 times higher with EG than that of PA-SA at 25 °C. The thermal energy storage and release rates of the composite PCMs also increased due to the high thermal conductivity of carbon materials. The density of composite PCMs were found to increase with the addition of GnPs but to decrease with EG. All composite PCMs show good thermal reliability. This work shows that EG has the greater potential to enhance the thermal energy storage performance of PCMs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy - Volume 97, 15 February 2016, Pages 488-497
Journal: Energy - Volume 97, 15 February 2016, Pages 488-497
نویسندگان
Yanping Yuan, Nan Zhang, Tianyu Li, Xiaoling Cao, Weiyue Long,