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TECHNICAL PAPERS

Wind Heat Loss From Corrugated, Transpired Solar Collectors

[+] Author and Article Information
Keith M. Gawlik

National Renewable Energy Laboratory, 1617 Cole Blvd., Golden, CO 80401e-mail: keith_gawlik@nrel.gov

Charles F. Kutscher

National Renewable Energy Laboratory, 1617 Cole Blvd., Golden, CO 80401e-mail: chuck_kutscher@nrel.gov

J. Sol. Energy Eng 124(3), 256-261 (Aug 01, 2002) (6 pages) doi:10.1115/1.1487886 History: Received March 01, 2001; Revised January 01, 2002; Online August 01, 2002
Copyright © 2002 by ASME
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References

Schlichting, H., 1979, Boundary Layer Theory, Seventh Edition, McGraw-Hill Book Co., New York, pp. 392–393.
Iglisch, R., 1944, “Exact Calculation of Laminar Boundary Layer in Longitudinal Flow Over a Flat Plate with Homogeneous Suction,” Tech. Memo. No. 1205, National Advisory Committee for Aeronautics, Washington, D.C.
Maddaeus,  A. D., and Shanebrook,  J. R., 1983, “The Three-Dimensional Laminar Asymptotic Boundary Layer with Suction,” J. Eng. Math., 17, pp. 73–91.
Arpaci, V. S., and Larsen, P. S., 1984, Convection Heat Transfer, Prentice-Hall, Englewood Cliffs, NJ, pp. 160–169.
Kutscher, C. F., 1992, “An Investigation of Heat Transfer for Air Flow Through Low Porosity Perforated Plates,” Ph.D. thesis, Univ. of Colorado, Dept. of Mech. Eng.
Kutscher,  C. F., Christensen,  C. B., and Barker,  G. M., 1993, “Unglazed Transpired Solar Collectors: Heat Loss Theory,” ASME J. Sol. Energy Eng., 115, pp. 182–188.
Bordner,  Gary L., 1978, “Nonlinear Analysis of Laminar Boundary Layer Flow Over a Periodic Wavy Surface,” Phys. Fluids, 21, pp. 1471–1474.
Bordner,  Gary L., 1980, “Nonlinear Analysis of Laminar Boundary Layer Flow Over a Periodic Wavy Surface—Part II: Long Waves,” Phys. Fluids, 23, pp. 858–863.
Patankar, S. V., 1980, Numerical Heat Transfer and Fluid Flow, Hemisphere Publishing Corp., New York.
Conserval Engineering, Inc., Toronto, Canada.
Hollick, J., 1994, private communication, Conserval Engineering, Inc., Toronto.
Ho,  R. T., and Gelhar,  L. W., 1973, “Turbulent Flow with Wavy Permeable Boundaries,” J. Fluid Mech., 58, Pt 2, pp. 403–414.

Figures

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Corrugated plate geometry, air flow velocity vectors, and heat flows
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Boundary layer development over plate with suction (not to scale). Net heat transfer into thermal boundary layer during starting length development is manifest as wind heat loss at the downstream end of the plate.
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Experimental facility at NREL (from Kutscher 5)
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Experimental and numerical boundary layer profiles for a separated flow case at 0.06 m/s suction air speed and 4 m/s crosswind air speed
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Nu merical results for attached flow boundary layer profiles for the medium aspect ratio plate with 0.09 m/s suction air speed and 2 m/s crosswind air speed
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Correlation of numerical results for attached flow
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Correlation of numerical results for separated flow
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Numerical data points for attached and separated flow cases and plot of correlation for predicting flow separation
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Increase in heat loss when separation occurs for a typical case

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