Journal
APPLIED ENERGY
Volume 154, Issue -, Pages 92-101Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.apenergy.2015.04.086
Keywords
Thermal energy storage; Latent heat storage; Phase change materials; Encapsulation
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Funding
- U.S. Department of Energy [DEEE0003590]
- E-On Corporation [CC - EIRI - 14 - 2010]
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An innovative technique to encapsulate PCMs that melt in the 120-350 degrees C temperature range is presented. The developed technique does not require a sacrificial layer to accommodate the volumetric expansion of the PCMs on melting. The encapsulation consists of coating a non-reactive polymer over the PCM pellet followed by deposition of a metal layer by a novel non-vacuum metal deposition technique. The fabricated capsules have survived more than 2200 thermal cycles, which is equivalent to about seven years of service in a thermal energy storage system. Thermophysical properties of the PCMs were investigated by DSC/TGA, IR and weight change analysis. Thermal cycling test showed no significant degradation in these properties at any stage of testing. (C) 2015 Elsevier Ltd. All rights reserved.
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