This work presents an experimental geometric optimization study to maximize the total heat transfer rate between a bundle of finned tubes in a given volume and a given external flow both for circular and elliptic arrangements, for general staggered configurations. The results are reported for air as the external fluid, in the range , where is the smaller ellipse axis. Experimental optimization results for finned circular and elliptic tubes arrangements are presented. A relative heat transfer gain of up to 80% is observed in the elliptic arrangement optimized with respect to tube-to-tube spacings, as compared to the optimal circular one. A relative heat transfer gain of 80% is observed in the three-way optimized elliptic arrangement in comparison with the two-way optimized circular one; i.e., with respect to tube-to-tube and fin-to-fin spacings. An empirical correlation for the three-way optimized configuration was obtained to evaluate the resulting maximized dimensionless heat transfer rate.
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Optimally Staggered Finned Circular and Elliptic Tubes in Turbulent Forced Convection
R. L. S. Mainardes,
R. L. S. Mainardes
Departamento de Engenharia Mecânica, Centro Politécnico,
Universidade Federal do Paraná
, Caixa Postal 19011, Curitiba, PR, 81531-990, Brazil
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R. S. Matos,
R. S. Matos
Departamento de Engenharia Mecânica, Centro Politécnico,
Universidade Federal do Paraná
, Caixa Postal 19011, Curitiba, PR, 81531-990, Brazil
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J. V. C. Vargas,
J. V. C. Vargas
Departamento de Engenharia Mecânica, Centro Politécnico,
e-mail: jvargas@demec.ufpr.br
Universidade Federal do Paraná
, Caixa Postal 19011, Curitiba, PR, 81531-990, Brazil
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J. C. Ordonez
J. C. Ordonez
Department of Mechanical Engineering and Center for Advanced Power Systems,
Florida State University
, Tallahassee, FL, 32310-6046
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R. L. S. Mainardes
Departamento de Engenharia Mecânica, Centro Politécnico,
Universidade Federal do Paraná
, Caixa Postal 19011, Curitiba, PR, 81531-990, Brazil
R. S. Matos
Departamento de Engenharia Mecânica, Centro Politécnico,
Universidade Federal do Paraná
, Caixa Postal 19011, Curitiba, PR, 81531-990, Brazil
J. V. C. Vargas
Departamento de Engenharia Mecânica, Centro Politécnico,
Universidade Federal do Paraná
, Caixa Postal 19011, Curitiba, PR, 81531-990, Brazile-mail: jvargas@demec.ufpr.br
J. C. Ordonez
Department of Mechanical Engineering and Center for Advanced Power Systems,
Florida State University
, Tallahassee, FL, 32310-6046J. Heat Transfer. May 2007, 129(5): 674-678 (5 pages)
Published Online: December 15, 2006
Article history
Received:
April 10, 2006
Revised:
December 15, 2006
Citation
Mainardes, R. L. S., Matos, R. S., Vargas, J. V. C., and Ordonez, J. C. (December 15, 2006). "Optimally Staggered Finned Circular and Elliptic Tubes in Turbulent Forced Convection." ASME. J. Heat Transfer. May 2007; 129(5): 674–678. https://doi.org/10.1115/1.2712860
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