Improving heat transfer of stabilised thermal oil-based tin nanofluids using biosurfactant and molecular layer deposition
| Autor: | Damiano La Zara, Nuria Navarrete, Jorge Ventura-Espinosa, Aristeidis Goulas, Marie-Anne Hatte, Leonor Hernández, Javier Gil-Font, J. Ruud van Ommen, Maximilian R. Bailey, Rosa Mondragón |
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| Přispěvatelé: | he authors want to thank the financial support from Universitat Jaume I (project UJI-B2016-47) and Ministerio de Economía y Competitividad (MINECO) (project ENE2016-77694-R). Nuria Navarrete thanks Universitat Jaume I for a pre-doctoral fellowship (Ref. PREDOC/2016/28) and a research mobility grant (Ref. E-2018-10). Authors thank Servicios Centrales de Instrumentacion Científica (SCIC) of Universitat Jaume I for the use of TEM (Maria del Carmen Peiró), TGA and DSC (Cristina Zahonero). This work has been developed by participants of the COST Action CA15119 Overcoming Barriers to Nanofluids Market Uptake (NANOUPTAKE). |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
thermal oil 020209 energy Enhanced heat transfer Energy Engineering and Power Technology chemistry.chemical_element biosurfactant 02 engineering and technology Heat transfer coefficient Heat capacity Industrial and Manufacturing Engineering Thermal conductivity Nanofluid 020401 chemical engineering Chemical engineering chemistry high temperature stability Heat transfer heat transfer 0202 electrical engineering electronic engineering information engineering molecular layer deposition Deposition (phase transition) nanofluid 0204 chemical engineering Tin |
| Zdroj: | Repositori Universitat Jaume I Universitat Jaume I |
| Popis: | The development of advanced heat transfer fluids (HTF) with enhanced heat transfer properties has been identified as a key target to increase the efficiency of industrial processes. In this work, heat transfer performance improvements of a novel nanofluid, consisting of metallic nanoparticles dispersed in a commercial thermal oil, were investigated. Nanofluids combining tin nanoparticles (1 mass %) with Therminol 66 (TH66) were synthesised using the two step-method and experimentally analysed. The effectiveness of biosurfactant addition and nanoparticle polyethylene terephthalate (PET) nanocoating for high temperature nanofluid stabilisation were independently investigated. The PET nanoscale coatings were grown by molecular layer deposition, which has been used for the first time in this field. The thermal conductivity, dynamic viscosity and specific heat capacity of the stable, oil-based nanofluids were characterised at high temperatures, and the results were compared and in good agreement with models found in the relevant literature. Finally, the heat transfer performance of the nanofluids with respect to their base fluids was evaluated, employing empirical values for the thermophysical properties of the involved materials. In this way, increments of the heat transfer coefficients up to 9.3% at 140 °C, relevant to industrial applications were obtained. |
| Databáze: | OpenAIRE |
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