New coloured coatings to enhance silica sand absorbance for direct particle solar receiver applications
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Other documents of the author: Gimeno Furió, Alexandra; Hernandez, Leonor; Martinez Cuenca, Raul; Mondragon, Rosa; VELA GASULLA, ANTONIO FABIAN; Cabedo, Luis; Barreneche, Camila; Iacob, Mihail
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comunitat-uji-handle2:10234/7035
comunitat-uji-handle3:10234/8617
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Title
New coloured coatings to enhance silica sand absorbance for direct particle solar receiver applicationsAuthor (s)
Date
2020-06-30Publisher
ElsevierISSN
0960-1481; 1879-0682Bibliographic citation
GIMENO-FURIO, A., et al. New coloured coatings to enhance silica sand absorbance for direct particle solar receiver applications. Renewable Energy, 2020, vol. 152Type
info:eu-repo/semantics/articlePublisher version
https://www.sciencedirect.com/science/article/pii/S0960148120300586Version
info:eu-repo/semantics/acceptedVersionSubject
Abstract
New systems using solid particles for solar energy capturing, heat transfer and thermal
energy storage have been proposed and analysed in direct particle solar receivers. In
this work, black coloured silica sand was ... [+]
New systems using solid particles for solar energy capturing, heat transfer and thermal
energy storage have been proposed and analysed in direct particle solar receivers. In
this work, black coloured silica sand was investigated as a possible solid particle for such
combined systems. Two different methods based on a carbon coating approach were
implemented to black colour the initial material to improve their solar absorption
characteristics. The morphology of the raw and coloured sands was analysed by
scanning electron microscopy (SEM), particle size characterisation and porosity
measurements. The coating of the black-coloured silica sands was evaluated by
thermogravimetry. Solar absorption was characterised in a double-beam UV-VIS
spectrophotometer combined with an integrating sphere, and with enhancements of
approximately 100%, found for both coloured sands. The thermal storage and heat
transfer capabilities of the initial and coated sands were measured at different
temperatures. Some improvements in the specific heat capacity and reductions in
thermal conductivity due to porosity changes were observed. [-]
Is part of
Renewable Energy, 2020, vol. 152Investigation project
This work has been partially funded by the Spanish governmentENE2015-64117-C5-2-R (MINECO/FEDER). The authors would liketo thank the Catalan Government for the quality accreditation givento their research group DIOPMA (2017 SGR118). LH and AGF ac-knowledges thefinancial support from the Generalitat Valenciana(Project: PROMETEU/2019/079) and from Pla de Promoci odelaInvestigaci oal’UJI (Project: UJI-B2016-47). The research waspartially supported by EU COST Action CA15119 Nanouptake“Overcoming Barriers to Nanofluids Market Uptake”. CB and MJacknowledges EU COST Action CA15119 for their STMS grants.Rights
info:eu-repo/semantics/openAccess
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