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Title:
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Thermal performance evaluation of bischofite at pilot plant scale
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Author:
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Gasia, Jaume; Gutiérrez, Andrea; Peiró Bell-lloch, Gerard; Miró, Laia; Grágeda, Mario; Ushak, Svetlana; Cabeza, Luisa F.
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Notes:
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The selection of the proper thermal energy storage (TES) material for an application is crucial. On the one
hand, these materials should have suitable thermal properties for the operational temperatures range of
the systems they are planned to work for, such as thermal stability, high latent heat and high heat capacity.
On the other hand, they should be available on the market and at low price. Besides, researchers have
to bear in mind the importance of testing TES materials not only at laboratory scale but also at higher
scale, since it has been demonstrated that some thermal characteristics are volume-dependant. In the
present study, bischofite, a by-product obtained from the non-metallic industry in the North of Chile with
desired thermal properties for mid-temperature applications (around 100 C), has been studied. A first
analysis was performed in terms of comparing the thermal properties and cost of bischofite with other
material previously studied as TES materials in order to evaluate its potential in both latent and sensible
phases. Afterwards, a second analysis was experimentally performed in terms of testing bischofite at
large-scale (204 kg) in a pilot plant facility. The experimental procedure consisted on several charging
processes within two different temperatures ranges: from 50 C to 80 C and from 80 C to 120 C in order
to study the behavior of the material in the sensible solid phase and latent phase respectively. The temperature
profiles, the power given by the HTF, the energy balance in the storage system and the accumulation
energy rate of the bischofite were analyzed. Results of both analysis showed that bischofite has
potential as TES material for mid-temperature applications.
The research leading to these results has received funding from the European Union’s Seventh Framework Programme (FP7/2007-2013) under Grant agreement n PIRSES-GA-2013-610692 (INNOSTORAGE). The work was partially funded by the Spanish government (Project ENE2011-22722). The authors would like to thank the Catalan Government for the quality accreditation given to their research group GREA (2014 SGR 123). The authors would like to acknowledge the collaboration of the company SALMAG. The authors acknowledge to FONDECYT (Grant No 1120422), CONICYT/FONDAP No 15110019, and the Education Ministry of Chile Grant PMI ANT 1201 for the financial support. Laia Miró would like to thank the Spanish Government for her research fellowship (BES-2012-051861). Andrea Gutierrez would like to thank to the Education Ministry of Chile her doctorate scholarship ANT 1106 and CONICYT/PAI NO 7813110010. |
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Subject(s):
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-Bischofite
-By-product
-Phase change materials (PCM)
-Thermal energy storage (TES) |
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Rights:
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cc-by-nc-nd, (c) Elsevier, 2015
http://creativecommons.org/licenses/by-nc-nd/4.0/
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Document type:
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article
acceptedVersion |
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Published by:
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Elsevier
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Share:
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