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ISSN Online: 2379-1748

ISBN Flash Drive: 978-1-56700-469-4

ISBN Online: 978-1-56700-470-0

Second Thermal and Fluids Engineering Conference
April, 2-5, 2017, Las Vegas, NV, USA

PHASE CHANGE BEHAVIOR OF CARBON BASED NANOCOMPOSITES IN HORIZONTAL SHELL-TUBE LATENT HEAT THERMAL ENERGY STORAGE SYSTEMS

Get access (open in a dialog) pages 2587-2588
DOI: 10.1615/TFEC2017.mnf.017369

摘要

In the present work, we numerically investigate the melting phenomena of carbon based nanocomposites in horizontally oriented shell-tube latent heat thermal energy storage system. Organic alkane n-eicosane was considered as the phase change material and carbon allotropes as the nano fillers to enhance the thermal conductivity of n-alkane. The effect of different carbon allotropes like nanodiamond (spherical), single-walled carbon nanotubes (one-dimensional) and graphene nanosheets (two-dimensional) were considered. Thermal conductivity of nanocomposites was modeled using effective medium based formulation considering the interfacial thermal boundary resistance between nanomaterial and the surrounding host matrix into account. Numerical results show that spherical nano inclusions do not enhance the melting rate due to limited enhancement in the thermal conductivity of nanocomposites. However, the inclusion of one-dimensional and two-dimensional nanostructures enhances the thermal conductivity of n-eicosane significantly which results in the improvement of melting rate. At 1 vol % loading of single-walled carbon nanotubes and graphene nanosheets the melting time decreases by ~ 27 % and ~ 40 % respectively.