Macroencapsulation and characterization of phase change materials for latent heat thermal energy storage systems

Tanvir E. Alam, Jaspreet S. Dhau, D. Yogi Goswami and Elias Stefanakos

Applied Energy, 2015, vol. 154, issue C, 92-101

Abstract: An innovative technique to encapsulate PCMs that melt in the 120–350°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.

Keywords: Thermal energy storage; Latent heat storage; Phase change materials; Encapsulation (search for similar items in EconPapers)
Date: 2015
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Citations: View citations in EconPapers (35)

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DOI: 10.1016/j.apenergy.2015.04.086

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