Use of polyethylene glycol for the improvement of the cycling stability of bischofite as thermal energy storage material
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Bischofite is a by-product of the non-metallic mining industry. It has been evaluated as phase change material in thermal energy storage, but it shows little cycling stability, therefore in this paper the mixture of bischofite with an additive was studied. Since polyethylene glycol (PEG) is a PCM itself, in this paper PEG (with different molecular weights) is used as additive in a PCM (bischofite) to improve its thermal behaviour. Results show that adding 5% PEG 2 000 to bischofite gives a more cycling stable PCM without affecting its melting temperature neither decreasing significantly its heat of fusion. This research shows that mixing an inorganic PCM with an organic additive can be a good option to improve the thermal performance of the PCM.
Is part ofApplied Energy, 2015, vol. 154, p. 616-621
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Ushak, Svetlana; Gutiérrez, Andrea; Galleguillos, Hector; Fernández, Ángel G.; Cabeza, Luisa F.; Grágeda, Mario (Elsevier, 2015)Physical characterization and thermal properties of bischofite, a by-product from the non-metallic industry, were determined and compared with those to MgCl2 6H2O with the idea of using it as phase change material in ...
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Ushak, Svetlana; Gutiérrez, Andrea; Barreneche Güerisoli, Camila; Fernández Renna, Ana Inés; Grágeda, Mario; Cabeza, Luisa F. (Elsevier, 2016)The use of by-products or wastes as phase change materials (PCM) in thermal energy storage (TES) systems is a good option to decrease the cost of such systems. One of the main disadvantages of PCM if inorganic materials ...