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Thermogravimetric study of a phase change slurry: effect of variable conditions

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Microcapsules containing Phase Change Materials (MPCM) are widely used for passive systems in energy storage. When MPCM are mixed with a carrier fluid, Phase Change Slurries (Ks) are used for heat transfer fluids in active systems or heat transport systems. The thermal behavior of PCS can be measured as dry or wet basis, resulting in important differences in weight losses. This study explores the optimum conditions for analyzing the thermal behavior of dried PCS by thermogravimetric analysis (TGA) varying the parameter conditions for obtaining peak temperature and heat flow (latent heat). The factors that were taken into account were the atmosphere of study (air and nitrogen) and the heating rate (0.5, 1, 5, and 10 degrees C.min(-1)). The best conditions to determine peak temperature are at 1 degrees C.min(-1) and in N-2 atmosphere, whereas the decomposition fusion/latent heat of the sample is improved g higher heating velocities towards 10 degrees C.min(-1). (C) 2016 Elsevier Ltd. All rights reserved.

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Applied Thermal Engineering, 2016, vol. 107, p. 329-338

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Articles publicats en revistes (Ciència dels Materials i Química Física)

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Thermogravimetric study of a phase change slurry: effect of variable conditions