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Heat exchangers play an important role in different industrial processes; therefore, it is important to characterize these devices to improve their efficiency by guaranteeing the efficient use of energy. In this study, we carry out a numerical analysis of flow dynamics, heat transfer, and entropy generation inside a heat exchanger; an aqueous medium used for oil extraction flows through the exchanger. Hot water flows on the shell side; nanoparticles have been added to the water in order to improve heat transfer toward the cold aqueous medium flowing on the tube side. The aqueous medium must reach a certain temperature in order to obtain its oil extraction properties. The analysis is performed for different Richardson numbers ( = 0.1-10), nanofluid volume fractions ( = 0.00-0.06), and heat exchanger heights ( = 0.6-1.0). Results are presented in terms of Nusselt number, total entropy generation, Bejan number, and performance evaluation criterion. Results showed that heat exchanger performance increases with the increase in when > 1 and when reducing .
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7516522 | PMC |
| http://dx.doi.org/10.3390/e22010086 | DOI Listing |
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