In an effort to reduce the cost and increase the material compatibility of encapsulated phase change materials (EPCMs) a new encapsulated system has been proposed. In the current study a molten salt eutectic of barium chloride (53% wt.), potassium chloride (28% wt.) and sodium chloride (19% wt.) has been identified as a promising candidate for low cost EPCM storage systems. The latent heat, melting point and thermal stability of the phase change material (PCM) was determined by DSC and was found to be in good agreement with results published in the literature. To cope with the corrosive nature of the PCM, it was decided that a fly-ash based geopolymer met the thermal and economic constraints for encapsulation. The thermal stability of the geopolymer shell was also tested with several formulations proving to form a stable shell for the chosen PCM at 200°C and/or 600°C. Lastly several capsules of the geopolymer shell with a chloride PCM were fabricated using a variety of methods with several samples remaining stable after exposure to 600°C testing.
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31 May 2016
SOLARPACES 2015: International Conference on Concentrating Solar Power and Chemical Energy Systems
13–16 October 2015
Cape Town, South Africa
Research Article|
May 31 2016
Geopolymer encapsulation of a chloride salt phase change material for high temperature thermal energy storage
Rhys Jacob;
Rhys Jacob
a)
1Barbara Hardy Institute,
University of South Australia
, Mawson Lakes, SA 5095, Australia
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Neil Trout;
Neil Trout
2Mawson Institute,
University of South Australia
, Mawson Lakes, SA 5095, Australia
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Ralf Raud;
Ralf Raud
3
Queensland University of Technology
, Brisbane, QLD 4000, Australia
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Stephen Clarke;
Stephen Clarke
2Mawson Institute,
University of South Australia
, Mawson Lakes, SA 5095, Australia
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Theodore A. Steinberg;
Theodore A. Steinberg
3
Queensland University of Technology
, Brisbane, QLD 4000, Australia
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Wasim Saman;
Wasim Saman
1Barbara Hardy Institute,
University of South Australia
, Mawson Lakes, SA 5095, Australia
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Frank Bruno
Frank Bruno
1Barbara Hardy Institute,
University of South Australia
, Mawson Lakes, SA 5095, Australia
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a)
Corresponding Author email: rhys.jacob@mymail.unisa.edu.au
AIP Conf. Proc. 1734, 050021 (2016)
Citation
Rhys Jacob, Neil Trout, Ralf Raud, Stephen Clarke, Theodore A. Steinberg, Wasim Saman, Frank Bruno; Geopolymer encapsulation of a chloride salt phase change material for high temperature thermal energy storage. AIP Conf. Proc. 31 May 2016; 1734 (1): 050021. https://doi.org/10.1063/1.4949119
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