Thermodynamic performance of boehmite alumina nanoparticle shapes in the counterflow double pipe heat exchanger
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Date
2022
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Sumy State University
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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 %.
Keywords
energy efficiency, thermal efficiency, Reynolds number, Nusselt number, process innovation
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