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Title Thermodynamic performance of boehmite alumina nanoparticle shapes in the counterflow double pipe heat exchanger
Authors Nogueira, E.
ORCID
Keywords energy efficiency
thermal efficiency
Reynolds number
Nusselt number
process innovation
Type Article
Date of Issue 2022
URI https://essuir.sumdu.edu.ua/handle/123456789/87436
Publisher Sumy State University
License Creative Commons Attribution 4.0 International License
Citation Nogueira E. (2022). Thermodynamic performance of boehmite alumina nanoparticle shapes in the counterflow double pipe heat exchanger. Journal of Engineering Sciences, Vol. 9(1), pp. F1-F10, doi: 10.21272/jes.2022.9(1).f1
Abstract This work compares a theoretical model with a consolidated numerical model related to the thermodynamic performance of boehmite alumina nanoparticles in different formats in a counterflow double pipe heat exchanger. The shapes of the non-spherical nanoparticles under analysis are platelets, blades, cylindrical, and bricks. The second law of thermodynamics is applied to determine Nusselt number, pressure drop, thermal efficiency, thermal and viscous irreversibilities, Bejan number, and the out temperature of the hot fluid. The entropy generation rates associated with the temperature field and the viscous flow are graphical determined. The numerical model uses the k-ε turbulence model, which requires empirical factors to simulate turbulent viscosity and rate of generation of turbulent kinetic energy. Compatibility between the models was demonstrated. It was shown that the maximum absolute numerical error between the quantities Nusselt number, heat transfer rate, and pressure drop for established and specific conditions is less than 12.5 %.
Appears in Collections: Journal of Engineering Sciences / Журнал інженерних наук

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