Thermophysical properties enhancement of octadecane using reduced graphene oxide and graphene oxide nanoplatelets

被引:8
|
作者
Zeitoun, Marwa [1 ]
Adel, Marwa [2 ]
Abulfotouh, Fuad [1 ]
Ebrahim, Shaker [1 ]
机构
[1] Alexandria Univ, Inst Grad Studies & Res, Mat Sci Dept, Alexandria, Egypt
[2] City Sci Res & Technol Applicat SRTA City, Adv Technol & New Mat Res Inst, Dept Fabricat Technol, Alexandria, Egypt
来源
JOURNAL OF ENERGY STORAGE | 2021年 / 38卷
关键词
Reduced graphene oxide; Nanoplatelets; Octadecane; Phase change materials; Thermal energy storage; PHASE-CHANGE MATERIAL; THERMAL-PROPERTIES; N-OCTADECANE; GRAPHITE; NANOPARTICLES; CONDUCTIVITY; STORAGE; NITRATE;
D O I
10.1016/j.est.2021.102512
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
The main aim of this study is to investigate the impact of various graphite derivatives on thermophysical properties (melting enthalpy, melting point, specific heat capacity, total heat storage thermal stability, and heat capacity) of octadecane (OD) organic paraffin as a base material for the Composite Phase Change Material (CPCM) for Thermal Energy Storage (TES). Three types of graphite derivatives additives of Reduced Graphene Oxide (RGO), Graphene Oxide Nanoplatelets (GONPs), and Expanded Graphite (EG) were mixed with the base material with four weight fractions. These ratios were 0.1, 0.3, 0.5 and 0.75 wt.% for GONPs and RGO while were 5, 10, 15, and 20 wt.% for EG. The results obtained revealed that the graphite derivatives had a significant effect on the thermophysical properties of the OD particularly the specific heat capacity (Cp). It was proved that RGO, the two-dimensional (2D) sheet structure, was the champion additive to improve the thermophysical properties of the OD. RGO increased Cp by 385% and 491% in the solid and liquid regions, respectively in comparison with the pristine base material and it was found that the total thermal energy storage (TES) capacity enhanced by 274%. Moreover, GONPs (2D) improved the Cp by 377% and 385% in the solid and liquid regions, respectively. On the other hand, the EG reduced the Cp of the OD by 31% and 71% in the liquid and solid regions, respectively.
引用
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页数:10
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