A new relationship on transport properties of nanofluids. Evidence with novel magnesium oxide based n-tetradecane nanodispersions

The worldwide increasing of thermal energy consumption fosters new technological solutions based on nanomaterials. The use of nanofluids enhances energy efficiency leading to eco-friendlier devices. Thus, researchers are encouraged to understand how modified thermophysical properties improve heat tr...

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Bibliographic Details
Published in:Powder technology 2022-01, Vol.397, p.117082, Article 117082
Main Authors: Prado, Jose I., Vallejo, Javier P., Lugo, Luis
Format: Article
Language:English
Subjects:
Aluminum
Aluminum oxide
Calorimetry
Cold storage
Differential scanning calorimetry
Energy consumption
Energy efficiency
Heat conductivity
Heat transfer
Magnesium
Magnesium oxide
N-tetradecane
Nanoenhanced phase change materials
Nanofluids
Nanomaterials
Nanotechnology
Polyethylene glycol
Rheometry
Shelf life
Silver
Superconductors (materials)
Tetradecane
Thermal conductivity
Thermal energy
Thermophysical properties
Titanium
Titanium oxide
Titanium oxides
Transport properties
Viscosity
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Summary:The worldwide increasing of thermal energy consumption fosters new technological solutions based on nanomaterials. The use of nanofluids enhances energy efficiency leading to eco-friendlier devices. Thus, researchers are encouraged to understand how modified thermophysical properties improve heat transfer capability. Magnesium oxide based n-tetradecane nanofluids are designed in terms of stability for cold storage application. Thermal conductivity, viscosity, density, and isobaric heat capacity were determined by transient hot wire, rotational rheometry, mechanical oscillation U-tube, and differential scanning calorimetry. Furthermore, a useful relationship on thermal conductivity and viscosity of nanofluids is proposed based on Andrade, Osida and Mohanty theories. Its reliability is checked with the here reported results and literature data of different nanofluids: titanium oxide within water, silver within poly(ethylene glycol), and aluminium oxide within (1-ethyl-3-methylimidazolium methanesulfonate + water). Similar trends have been found for all nanofluids excepting titanium oxide aqueous nanofluids, this differentiated behaviour being expected by the proposed relationship. [Display omitted] •MgO/n-C14 nanofluids are designed for cold thermal energy storage applications•The experimental thermophysical profile of the novel stable nanofluids is reported•A new relationship on transport properties of nanofluids is proposed and analysed•A further understanding on the enhancing mechanism of nanofluids is approached
ISSN:0032-5910
1873-328X
DOI:10.1016/j.powtec.2021.117082