Numerical and thermodynamic analysis of external flow over tube banks for waste heat recovery

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dc.contributorAllison, Paul Galon
dc.contributorSharif, Muhammad Ali Rob
dc.contributor.advisorMacPhee, David W.
dc.contributor.authorErguvan, Mustafa
dc.contributor.otherUniversity of Alabama Tuscaloosa
dc.date.accessioned2019-02-12T14:32:02Z
dc.date.available2019-02-12T14:32:02Z
dc.date.issued2018
dc.descriptionElectronic Thesis or Dissertationen_US
dc.description.abstractThis study will involve numerical energy and exergy analyses for unsteady cross flow over heated circular cylinders. Several simulations were conducted using Ansys FLUENT 18.2 with different values of Reynolds number, inlet temperatures, number of in-line cylinders, pitch ratios, as well as the heat transfer coefficient of artificial heat leakages. Heat leakages were considered as the source terms for the concerned domain. The comparison of the numerical results with published data was favorable with regard to values of Nusselt number and pressure drop. It was found that the energy efficiency varies from 72%–99% for all cases, while viscous dissipation had a highly limited effect on the energy efficiency of cases with low Reynolds number values. The exergy efficiency ranged from 26%–70%, while the entropy generation due to heat transfer was found to have a significant effect on exergy efficiency. Furthermore, while heat leakage had a considerable effect on energy efficiency, its effect was more prominent in the exergy analysis, especially for low Reynolds number and high pitch ratio cases. It was observed that while energy efficiency increases with increasing inlet temperature, exergy efficiency demonstrates a decreasing trend. Therefore, inlet temperature was determined as the most influential parameter in this analysis. The results suggest that energy and exergy efficiencies can be maximized through the selection of specific pitch ratios for various Reynolds number values. The results of this study could be useful in designing more efficient heat recovery systems, especially for low, medium, and high-temperature applications.en_US
dc.format.extent129 p.
dc.format.mediumelectronic
dc.format.mimetypeapplication/pdf
dc.identifier.otheru0015_0000001_0003252
dc.identifier.otherErguvan_alatus_0004M_13622
dc.identifier.urihttp://ir.ua.edu/handle/123456789/5435
dc.languageEnglish
dc.language.isoen_US
dc.publisherUniversity of Alabama Libraries
dc.relation.hasversionborn digital
dc.relation.ispartofThe University of Alabama Electronic Theses and Dissertations
dc.relation.ispartofThe University of Alabama Libraries Digital Collections
dc.rightsAll rights reserved by the author unless otherwise indicated.en_US
dc.subjectThermodynamics
dc.subjectEnergy
dc.titleNumerical and thermodynamic analysis of external flow over tube banks for waste heat recoveryen_US
dc.typethesis
dc.typetext
etdms.degree.departmentUniversity of Alabama. Department of Mechanical Engineering
etdms.degree.disciplineMechanical Engineering
etdms.degree.grantorThe University of Alabama
etdms.degree.levelmaster's
etdms.degree.nameM.S.
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