Journal
ENERGY TECHNOLOGY
Volume 5, Issue 8, Pages 1392-1398Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ente.201600689
Keywords
composite materials; fatty acid esters; phase change materials; passive heat storage; thermal analysis
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Funding
- Infrastructure and Transportation Technology Promotion Research Program - Ministry of Land, Infrastructure, and Transport of the Korean government [16CTAP-C07801403]
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The thermal performance of phase change materials (PCMs) for energy savings is important in various fields. Fatty acid waxes are types of organic fatty acid ester PCMs made from under-used and renewable feedstocks. However, they possess one major drawback, namely their phase instability in the liquid state. Therefore, to improve stability during phase transitions, a new method of leakage prevention was developed to form the layer. The thermal properties of the layered PCM gypsum boards were analyzed by differential scanning calorimetry (DSC), phase change, enthalpy, and leakage tests. Finally, a dynamic heat transfer analysis of the layered PCM gypsum board was performed for the evaluation of the peak temperature reduction time lag effects of the prepared specimen. The latent heats of palm wax (PW) and beeswax (BW) were 178.1 and 173.6Jg(-1) during heating, 159.7 and 140.9Jg(-1), during freezing, respectively. Furthermore, the peak temperatures of the three wax-infused layered PCM gypsum board samples were reduced by 4.6, 6.6 and 0.9 degrees C, respectively, compared with reference gypsum board.
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