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Open AccessFeature PaperArticle

Phase Change Material Selection for Thermal Energy Storage at High Temperature Range between 210 °C and 270 °C

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GREiA Research Group, INSPIRES Research Centre, Universitat de Lleida, Pere de Cabrera s/n, 25001 Lleida, Spain
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CIRIAF—Interuniversity Research Centre on Pollution and Environment Mauro Felli, Via G. Duranti 63, 06125 Perugia, Italy
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Department of Mechanical Engineering and Construction, Universitat Jaume I, Av. Vicent Sos Baynat, s/n, 12071 Castellón de la Plana, Spain
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Energy Development Center, University of Antofagasta, Av. Universidad de Antofagasta, 02800 Antofagasta, Chile
*
Author to whom correspondence should be addressed.
Energies 2018, 11(4), 861; https://doi.org/10.3390/en11040861
Received: 23 February 2018 / Revised: 20 March 2018 / Accepted: 27 March 2018 / Published: 8 April 2018
(This article belongs to the Section Energy Storage and Application)
The improvement of thermal energy storage systems implemented in solar technologies increases not only their performance but also their dispatchability and competitiveness in the energy market. Latent heat thermal energy storage systems are one of those storing methods. Therefore, the need of finding the best materials for each application becomes an appealing research subject. The main goal of this paper is to find suitable and economically viable materials able to work as phase change material (PCM) within the temperature range of 210–270 °C and endure daily loading and unloading processes in a system with Fresnel collector and an organic Rankine cycle (ORC). Twenty-six materials have been tested and characterized in terms of their thermophysical conditions, thermal and cycling stability, and health hazard. Two materials out of the 26 candidates achieved the last stage of the selection process. However, one of the two finalists would require an inert working atmosphere, which would highly increase the cost for the real scale application. This leads to a unique suitable material, solar salt (40 wt % KNO3/60 wt % NaNO3). View Full-Text
Keywords: thermal energy storage (TES); Fresnel collector; thermal stability; cycling stability; thermophysical properties; health hazard; myo-inositol; solar salt; infrared spectroscopy (IR); differential scanning calorimetry (DSC) thermal energy storage (TES); Fresnel collector; thermal stability; cycling stability; thermophysical properties; health hazard; myo-inositol; solar salt; infrared spectroscopy (IR); differential scanning calorimetry (DSC)
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MDPI and ACS Style

Maldonado, J.M.; Fullana-Puig, M.; Martín, M.; Solé, A.; Fernández, Á.G.; De Gracia, A.; Cabeza, L.F. Phase Change Material Selection for Thermal Energy Storage at High Temperature Range between 210 °C and 270 °C. Energies 2018, 11, 861.

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