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Wettability Control for Correct Thermophysical Properties Determination of Molten Salts and Their Nanofluids

Author

Listed:
  • Yaroslav Grosu

    (CIC Energigune, Albert Einstein, 4801510 Miñano, Spain)

  • Luis González-Fernández

    (CIC Energigune, Albert Einstein, 4801510 Miñano, Spain)

  • Udayashankar Nithiyanantham

    (CIC Energigune, Albert Einstein, 4801510 Miñano, Spain
    Applied Physics II Department, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), PO Box 644, 48080 Bilbao, Spain)

  • Abdessamad Faik

    (CIC Energigune, Albert Einstein, 4801510 Miñano, Spain)

Abstract

Proper recording of thermophysical properties for molten salts (MSs) and molten salts based nanofluids (MSBNs) is of paramount importance for the thermal energy storage (TES) technology at concentrated solar power (CSP) plants. However, it is recognized by scientific and industrial communities to be non-trivial, because of molten salts creeping (scaling) inside a measuring crucible or a sample container. Here two strategies are proposed to solve the creeping problem of MSs and MSBNs for the benefit of such techniques as differential scanning calorimetry (DSC) and laser flash apparatus (LFA). The first strategy is the use of crucibles with rough inner surface. It was found that only nanoscale roughness solves the creeping problem, while micron-scale roughness does not affect the wetting phenomena considerably. The second strategy is the use of crucible made of or coated with a low-surface energy material. Both strategies resulted in contact angle of molten salt higher than 90° and as a result, repeatable measurements in correspondence to the literature data. The proposed methods can be used for other characterization techniques where the creeping of molten salts brings the uncertainty or/and unrepeatability of the measurements.

Suggested Citation

  • Yaroslav Grosu & Luis González-Fernández & Udayashankar Nithiyanantham & Abdessamad Faik, 2019. "Wettability Control for Correct Thermophysical Properties Determination of Molten Salts and Their Nanofluids," Energies, MDPI, vol. 12(19), pages 1-13, October.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:19:p:3765-:d:273019
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    References listed on IDEAS

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    1. Vignarooban, K. & Xu, Xinhai & Arvay, A. & Hsu, K. & Kannan, A.M., 2015. "Heat transfer fluids for concentrating solar power systems – A review," Applied Energy, Elsevier, vol. 146(C), pages 383-396.
    2. Arthur, Owen & Karim, M.A., 2016. "An investigation into the thermophysical and rheological properties of nanofluids for solar thermal applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 55(C), pages 739-755.
    3. Gil, Antoni & Medrano, Marc & Martorell, Ingrid & Lázaro, Ana & Dolado, Pablo & Zalba, Belén & Cabeza, Luisa F., 2010. "State of the art on high temperature thermal energy storage for power generation. Part 1--Concepts, materials and modellization," Renewable and Sustainable Energy Reviews, Elsevier, vol. 14(1), pages 31-55, January.
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    Cited by:

    1. Patrice Estellé & Leonor Hernández López & Matthias H. Buschmann, 2020. "Special Issue of the 1st International Conference on Nanofluids (ICNf19)," Energies, MDPI, vol. 13(9), pages 1-4, May.
    2. Skrbek, Kryštof & Bartůněk, Vilém & Sedmidubský, David, 2022. "Molten salt-based nanocomposites for thermal energy storage: Materials, preparation techniques and properties," Renewable and Sustainable Energy Reviews, Elsevier, vol. 164(C).
    3. Nur Çobanoğlu & Ziya Haktan Karadeniz & Patrice Estellé & Raul Martínez-Cuenca & Matthias H. Buschmann, 2019. "Prediction of Contact Angle of Nanofluids by Single-Phase Approaches," Energies, MDPI, vol. 12(23), pages 1-16, November.

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