Transient thermal response of phase change material embedded with graphene nanoplatelets in an energy storage unit

Throughout this study, a systematic investigation was carried out on heating performances of phase change materials doped by graphene nanoplatelets (GNP) in an energy storage unit. The composite samples were prepared by dispersing GNP into organic PCM via melting temperatures between 61 and 66 °C an...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2018-08, Vol.133 (2), p.907-918
Main Authors: Temel, Umit Nazli, Somek, Kutlu, Parlak, Murat, Yapici, Kerim
Format: Article
Language:English
Subjects:
Analytical Chemistry
Chemistry
Chemistry and Materials Science
Composite materials
Electric properties
Energy consumption
Energy management
Energy storage
Graphene
Graphite
Heat transfer
Heating
Inorganic Chemistry
Latent heat
Measurement Science and Instrumentation
Phase change materials
Physical Chemistry
Polymer Sciences
Product development
Temperature gradients
Thermal conductivity
Thermal energy
Thermal response
Thermoelectricity
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Summary:Throughout this study, a systematic investigation was carried out on heating performances of phase change materials doped by graphene nanoplatelets (GNP) in an energy storage unit. The composite samples were prepared by dispersing GNP into organic PCM via melting temperatures between 61 and 66 °C and at various mass fractions that included 3, 5 and 7%. A linear increase in thermal conductivity of the GNP/PCM composites was observed as the GNP mass fraction increased. With respect to PCM, thermal conductivity of GNP/PCM composites, mixed with GNP at 3, 5 and 7% mass fractions, increased by 105, 181 and 253%, respectively, at 10 °C. On the other hand, a decrease in latent heat values occurred in the composites, by 2.2, 8.6 and 15.6%, respectively. Due to the increase in the doped GNP mass fraction, the temperature difference between the closest and farthest points to the heat source in the energy storage unit reduced significantly when compared to that of the PCM. When delaying durations of the closest point to the heat source were compared, due to the doped GNP fraction, it was determined that the 7% GNP/PCM composite extended the effective use of energy storage unit by 32 min compared to the PCM. Finally, after 50 heating/cooling cycles it also retained stability of GNP nanoparticles in the composite.
ISSN:1388-6150
1588-2926
DOI:10.1007/s10973-018-7161-7