Rheology of Solar-Salt based nanofluids for concentrated solar power. Influence of the salt purity, nanoparticle concentration, temperature and rheometer geometry

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dc.contributor.authorMuñoz-Sánchez, Belén
dc.contributor.authorNieto-Maestre, Javier
dc.contributor.authorVeca, Elisabetta
dc.contributor.authorLiberatore, Raffaele
dc.contributor.authorSau, Salvatore
dc.contributor.authorNavarro, Helena
dc.contributor.authorDing, Yulong
dc.contributor.authorNavarrete, Nuria
dc.contributor.authorJuliá, J. Enrique
dc.contributor.authorFernández, Ángel G.
dc.contributor.authorGarcía-Romero, Ana
dc.contributor.institutionTecnalia Research & Innovation
dc.contributor.institutionVALORIZACIÓN DE RESIDUOS
dc.date.accessioned2024-07-24T12:12:03Z
dc.date.available2024-07-24T12:12:03Z
dc.date.issued2018-03
dc.descriptionPublisher Copyright: © 2017 Elsevier B.V.
dc.description.abstractSolar Salt-based nanofluids have attracted significant scientific interest in recent years due to their improved thermal properties, making them strong candidates as thermal energy storage materials and/or heat transfer fluids in CSP plants. There have been reports on increased specific heat due to the addition of nanoparticles, however, there is a lack of comprehensive information on other essential properties affecting the heat transfer, such as the viscosity. This article concerns the rheological behaviour of nanofluids made of Solar Salt (mass percentage at 60% NaNO3 – 40% KNO3) as the base fluid and silica or alumina nanoparticles as additives. The evolution of these nanofluids viscosity as a function of the shear rate (1–1000 s−1) at a temperature range of 250–400 °C was measured and analysed. The impact of the salt purity (refined or industrial grade), the nanoparticle concentration (0.5–1.5 wt%) and the rheometer measuring configuration (coaxial cylinder or parallel plate) are examined. The results showed in general a Newtonian behaviour of the nanofluids with independency of the rheometer configuration. The relationship between the viscosity and the temperature follows an Arrhenius model. The influence of the nanoparticle concentration on the viscosity of the refined grade Solar Salt is analysed according to the Maron-Pierce and Kriegher-Dougherty models for the nanofluids containing alumina and silica nanoparticles respectively, due to their different shape.en
dc.description.sponsorshipThe authors wish to acknowledge the University of the Basque Country (UPV/EHU) for supporting the PhD of Belén Muñoz-Sánchez and her research stay at the Universidad de Antofagasta, the NanoUptake COST project for supporting the STSM of Belén Muñoz-Sánchez and Nuria Navarrete at the University of Birmingham . This work was supported by the European Union Seventh Framework Programme FP7/2007-2013 [grant agreement no. 609837 , STAGE-STE project]; European Union Framework Programme Horizon 2020 [COST Action CA15119 , Nanouptake – Overcoming Barriers to Nanofluids Market Uptake].
dc.description.statusPeer reviewed
dc.format.extent17
dc.identifier.citationMuñoz-Sánchez , B , Nieto-Maestre , J , Veca , E , Liberatore , R , Sau , S , Navarro , H , Ding , Y , Navarrete , N , Juliá , J E , Fernández , Á G & García-Romero , A 2018 , ' Rheology of Solar-Salt based nanofluids for concentrated solar power. Influence of the salt purity, nanoparticle concentration, temperature and rheometer geometry ' , Solar Energy Materials and Solar Cells , vol. 176 , pp. 357-373 . https://doi.org/10.1016/j.solmat.2017.10.022
dc.identifier.doi10.1016/j.solmat.2017.10.022
dc.identifier.issn0927-0248
dc.identifier.urihttps://hdl.handle.net/11556/4245
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=85033240014&partnerID=8YFLogxK
dc.language.isoeng
dc.relation.ispartofSolar Energy Materials and Solar Cells
dc.relation.projectIDEuropean Union Framework Programme Horizon 2020
dc.relation.projectIDEngineering and Physical Sciences Research Council, EPSRC, EP/J021199/1-EP/L014211/1-EP/N001745/1-EP/L019469/1-EP/N021142/1-EP/K002252/1-EP/L017725/1
dc.relation.projectIDEuropean Cooperation in Science and Technology, COST, CA15119
dc.relation.projectIDSeventh Framework Programme, FP7, 609837
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subject.keywordsCSP
dc.subject.keywordsNanofluid
dc.subject.keywordsNanoparticles
dc.subject.keywordsRheology
dc.subject.keywordsSolar Salt
dc.subject.keywordsTES
dc.subject.keywordsElectronic, Optical and Magnetic Materials
dc.subject.keywordsRenewable Energy, Sustainability and the Environment
dc.subject.keywordsSurfaces, Coatings and Films
dc.subject.keywordsSDG 7 - Affordable and Clean Energy
dc.titleRheology of Solar-Salt based nanofluids for concentrated solar power. Influence of the salt purity, nanoparticle concentration, temperature and rheometer geometryen
dc.typejournal article
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