Volume 5, 2018
|Number of page(s)||12|
|Published online||23 May 2018|
Solvothermal method as a green chemistry solution for micro-encapsulation of phase change materials for high temperature thermal energy storage
National Institute for Nonferrous and Rare Metals-IMNR,
Blvd. Biruintei no.102,
Pantelimon, Ilfov, Romania
2 Instituto Tecnologico del Calzado y Conexas-INESCOP, Elda-Alicante, Spain
* e-mail: firstname.lastname@example.org
Accepted: 18 January 2018
Thermal energy storage systems using phase change materials (PCMs) as latent heat storage are one of the main challenges at European level in improving the performances and efficiency of concentrated solar power energy generation due to their high energy density. PCM with high working temperatures in the temperature range 300–500 °C are required for these purposes. However their use is still limited due to the problems raised by the corrosion of the majority of high temperature PCMs and lower thermal transfer properties. Micro-encapsulation was proposed as one method to overcome these problems. Different micro-encapsulation methods proposed in the literature are presented and discussed. An original process for the micro-encapsulation of potassium nitrate as PCM in inorganic zinc oxide shells based on a solvothermal method followed by spray drying to produce microcapsules with controlled phase composition and distribution is proposed and their transformation temperatures and enthalpies measured by differential scanning calorimetry are presented.
Key words: phase change materials / thermal energy storage / micro-encapsulation
© A.I. Tudor et al., Published by EDP Sciences 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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