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Review

Triglycerides as Novel Phase-Change Materials: A Review and Assessment of Their Thermal Properties

1
Competence Centre Thermal Energy Storage (TES), Lucerne University of Applied Sciences and Arts, 6048 Horw, Switzerland
2
EaStCHEM, School of Chemistry, The University of Edinburgh, Edinburgh EH9 3FJ, UK
*
Author to whom correspondence should be addressed.
Academic Editors: Ana Ines Fernandez Renna and Camila Barreneche
Molecules 2020, 25(23), 5572; https://doi.org/10.3390/molecules25235572
Received: 3 November 2020 / Revised: 20 November 2020 / Accepted: 23 November 2020 / Published: 27 November 2020
(This article belongs to the Special Issue Phase Change Materials 2.0)
Latent Heat Storage (LHS) with Phase-Change Materials (PCMs) represents a high energy density storage technology which could be applied in a variety of applications such as waste heat recovery and integration of renewable energy technologies in energy systems. To increase the sustainability of these storage solutions, PCMs have to be developed with particular regard to bio-origin and biodegradability. Triglycerides represent an interesting class of esters as the main constituents of animal and vegetable fats, with attractive thermal properties. In order to be used as PCMs, the thermal behaviour of triglycerides has to be fully understood, as in some cases they have been reported to show polymorphism and supercooling. This study assesses the suitability of triglycerides as PCMs by reviewing the literature published so far on their behaviour and properties. In particular, melting points, enthalpies of fusion, polymorphism, thermal conductivities, heat capacities and thermal cycling stabilities are considered, with a focus on LHS and thermal energy storage applications. In addition, the efforts conducted regarding modelling and the prediction of melting points and enthalpies based on chemical structures are summarized and assessed. View Full-Text
Keywords: triglycerides; thermal energy storage; phase change materials; thermal properties; enthalpy; melting point; latent heat storage; PCM; LHS; TES triglycerides; thermal energy storage; phase change materials; thermal properties; enthalpy; melting point; latent heat storage; PCM; LHS; TES
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MDPI and ACS Style

Ravotti, R.; Worlitschek, J.; Pulham, C.R.; Stamatiou, A. Triglycerides as Novel Phase-Change Materials: A Review and Assessment of Their Thermal Properties. Molecules 2020, 25, 5572. https://doi.org/10.3390/molecules25235572

AMA Style

Ravotti R, Worlitschek J, Pulham CR, Stamatiou A. Triglycerides as Novel Phase-Change Materials: A Review and Assessment of Their Thermal Properties. Molecules. 2020; 25(23):5572. https://doi.org/10.3390/molecules25235572

Chicago/Turabian Style

Ravotti, Rebecca, Jörg Worlitschek, Colin R. Pulham, and Anastasia Stamatiou. 2020. "Triglycerides as Novel Phase-Change Materials: A Review and Assessment of Their Thermal Properties" Molecules 25, no. 23: 5572. https://doi.org/10.3390/molecules25235572

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