BIBLIOS

Document type
Journal articles

Document subtype
Full paper

Title
Possible New Heat Transfer Fluid: The IoNanofluid of 1-Ethyl-3-methylimidazolium Dicyanamide + Nano-Titanium Oxide─Studying Its Thermal Conductivity and Viscosity

Participants in the publication
Carlos A. Nieto de Castro (Author)
Dep. Química e Bioquímica
CQE
Angela Lamas (Author)
Xavier Paredes (Author)
Fernando J. V Santos (Author)
Dep. Química e Bioquímica
Maria José V. Lourenço (Author)
Dep. Química e Bioquímica
CQE
Teófilo A. Graber (Author)

Summary
Ionic liquids with the dicyanamide anion, namely with 1-alkyl-imidazolium cations have been receiving attention recently due to their potential applications. The utilization of these liquids as heat transfer fluids, specifically in small heat exchangers and micro-channels for microprocessor cooling, is presently deemed highly feasible, as it can be both more efficient and environmentally acceptable. The design of heat transfer equipment that makes use of fluids requires knowledge of their thermophysical properties. In this regard, dispersions of nanoparticles have been extensively studied in recent years to improve thermal conductivity or obtain desirable optical properties. IoNanofluids is what we have taken to name the result of such dispersions in ionic liquids.\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\nIn this paper we report measurements of the thermal conductivity and viscosity of the IoNanofluid of 1-ethyl-3-methylimidazolium dicyanamide, [C2mim][N(CN)2], with 0.5% mass fraction of TiO2 nanoparticles (diameter 20 nm) in the temperature range (293 < T/K < 343), at P = 0.1 MPa. Reasonable enhancements were found for thermal conductivity and viscosity, temperature-dependent. The IoNanofluid was found to behave as a non-Newtonian fluid, in most of the temperature range studied. A discussion about the possible use of this IoNanofluid as a heat transfer fluid shows that it has very promising properties to be used in heat transfer applications.


Institution
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA

Where published
Journal of Chemical & Engineering Data

Publication Identifiers
ISSN - 0021-9568

Publisher
American Chemical Society (ACS)



Document Identifiers
DOI - https://doi.org/10.1021/acs.jced.4c00167
URL - https://doi.org/10.1021/acs.jced.4c00167

Rankings
Web Of Science Q2 (2023) - 2.0 - THERMODYNAMICS
SCOPUS Q2 (2023) - 5.2 - Chemical Engineering (all)