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TECHNICAL PAPERS

Experimental Characterization of Compact Heat Exchangers With Short Flow Lengths at Simulated Elevated Altitudes

[+] Author and Article Information
J. A. Mathias, J. Cao, M. E. Ewing, R. N. Christensen

Department of Mechanical Engineering, The Ohio State University, 206 W. 28th Avenue, Columbus, OH 43210

J. Fluids Eng 125(1), 171-180 (Jan 22, 2003) (10 pages) doi:10.1115/1.1516574 History: Received March 27, 2001; Revised May 29, 2002; Online January 22, 2003
Copyright © 2003 by ASME
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References

Kays, W. M., and London, A. L., 1984, Compact Heat Exchangers, 3rd Ed., McGraw-Hill, New York.
Clark,  S. H., and Kays,  W. M., 1953, “Laminar-Flow Forced Convection in Rectangular Tubes,” Trans. ASME, 75, pp. 859–866.
Shah, R. K., and London, A. L., 1978, Laminar Flow Forced Convection in Ducts, Academic Press, San Diego, CA.
Sparrow,  E. M., Hixon,  C. W., and Shavit,  G., 1967, “Experiments on Laminar Flow Development in Rectangular Ducts,” Transaction of the ASME. J. Basic Eng., 89, pp. 116–124.
Lundgren,  T. S., Sparrow,  E. M., and Starr,  J. B., 1964, “Pressure Drop due to the Entrance Region in Ducts of Arbitrary Cross Section,” Transaction of the ASME. J. Basic Eng., 86, pp. 620–626.
Fleming,  D. P., and Sparrow,  E. M., 1969, “Flow in the Hydrodynamic Entrance Region of Ducts of Arbitrary Cross Section,” ASME J. Heat Transfer, 91, pp. 345–354.
Han,  L. S., 1960, “Hydrodynamic Entrance Lengths for Incompressible Laminar Flow in Rectangular Ducts,” ASME J. Appl. Mech., 28, pp. 403–409.
Montgomery,  S. R., and Wibulswas,  P., 1967, “Laminar Flow Heat Transfer for Simultaneously Developing Velocity and Temperature Profiles in Ducts of Rectangular Cross Section,” Appl. Sci. Res., 18, pp. 247–259.
Fox, R. W., and McDonald, A. T., 1992, Introduction to Fluid Mechanics, 4th Ed., John Wiley and Sons, New York, p. 355.
Streeter, V. L., ed., 1961, Handbook of Fluid Dynamics, McGraw-Hill, New York.
Hewitt, G. F., 1992, Handbook of Heat Exchanger Design, Begell House, New York.
Gnielinski,  V., 1976, “New Equations for Heat and Mass Transfer in Turbulent Pipe and Channel Flow,” Int. Chem. Eng., 16, p. 359.
Ewing, M. E., 1998, “Fundamental Studies of Enhanced Heat Exchanger Surfaces at Low Reynolds Numbers,” Ph.D. dissertation, The Ohio State University, Columbus, OH.
Singh,  S. N., 1958, “Heat Transfer by Laminar Flow in a Cylindrical Tube,” Appl. Sci. Res., 7, pp. 325–340.
Taitel,  Y., and Tamir,  A., 1972, “Application of the Integral Method to Flows With Axial Diffusion,” Int. J. Heat Mass Transf., 15, pp. 733–740.
Moffat,  R. J., 1988, “Describing the Uncertainties in Experimental Results,” Exp. Fluid Therm Sci., 1, pp. 3–17.

Figures

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Loss coefficient versus x+ for rectangular ducts with an aspect ratio of 1/6
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Loss coefficient versus x+ for rectangular ducts with an aspect ratio of 1/9
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Loss coefficient versus x+ for rectangular ducts with an aspect ratio of 1/15
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Parameters of fins and overall design of a compact heat exchanger
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Diagram of the experimental apparatus
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Loss coefficient versus x+ for rectangular ducts with an aspect ratio of 1/3
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Comparison between sea level and elevated altitude for aspect ratio 1/3
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Comparison between sea level and elevated altitude for aspect ratio 1/9
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Comparison between sea level and elevated altitude for aspect ratio 1/15
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Heat transfer experiments for aspect ratio 1/3
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Heat transfer experiments for aspect ratio 1/6
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Heat transfer experiments and graph of Eq. (13) for aspect ratio 1/9
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Heat transfer experiments for aspect ratio 1/15
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Comparison of K(∞) of the present data to previous studies
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Comparison of entrance lengths of the present data to previous studies
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Comparison of Nusselt numbers of the present data to a previous study

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