Highly conducting core-shell phase change materials for thermal regulation
authors Vitorino, N; Abrantes, JCC; Frade, JR
nationality International
journal APPLIED THERMAL ENGINEERING
author keywords Microstructural design; Self-assembling; Core-shell; Phase change materials; Thermal conductivity
keywords LATENT-HEAT STORAGE; ENERGY-STORAGE; GRAPHITE COMPOSITE; CARBON FOAMS; ENHANCEMENT; RELIABILITY; SYSTEM
abstract A core shell model has been derived for microstructural design of PCM-based composites with optimized 3-dimensional organization of a conducting phase, and a novel method was developed to process self-assembled core shell composites for thermal regulation or heat storage. The method was based on emulsification of graphite suspensions in melted paraffin yielding a core shell microstructure based on self-organisation of graphite platelets with preferential orientation; this allows remarkable enhancement of thermal conductivity, which increases by at least one order of magnitude for 5 vol% graphite addition. The microstructure of the graphite shell remains stable upon repeated cycling above and below the melting temperature of the paraffin, and shape stabilization is also retained, even without external encapsulation. One confirm that the levels of thermal conductivity of these phase change materials is sufficient for latent heat discharge from relatively large spherical samples to surrounding air. (C) 2014 Elsevier Ltd. All rights reserved.
publisher PERGAMON-ELSEVIER SCIENCE LTD
issn 1359-4311
year published 2014
volume 66
issue 01-Feb
beginning page 131
ending page 139
digital object identifier (doi) 10.1016/j.applthermaleng.2014.02.001
web of science category Thermodynamics; Energy & Fuels; Engineering, Mechanical; Mechanics
subject category Thermodynamics; Energy & Fuels; Engineering; Mechanics
unique article identifier WOS:000336352000014

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