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TECHNICAL PAPERS

Experimental Investigation of Natural Convection Heat Loss From a Model Solar Concentrator Cavity Receiver

[+] Author and Article Information
T. Taumoefolau, S. Paitoonsurikarn, K. Lovegrove

Centre for Sustainable Energy Systems, Department of Engineering, Australian National University, Canberra ACT 0200, Australia

G. Hughes

Research School of Earth Sciences, Australian National University, Canberra ACT 0200, Australia

J. Sol. Energy Eng 126(2), 801-807 (May 04, 2004) (7 pages) doi:10.1115/1.1687403 History: Received August 01, 2003; Revised December 01, 2003; Online May 04, 2004
Copyright © 2004 by ASME
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References

Clausing,  A. M., 1981, “An Analysis of Convective Losses From Cavity Solar Central Receivers,” Sol. Energy, 27(4), pp. 295–300.
Luzzi, A., Lovegrove, K., Paitoonsurikarn, S., Siangsukone, P., Johnston, G., Burgess, G., Joe, W., and Major, G., 2002, “Paraboloidal Dish Solar Concentrator Investigations at the ANU-an update,” Proc. of the International Symposium on Concentrated Solar Power and Chemical Energy Technologies, Zurich.
Clausing,  A. M., 1983, “Convection Losses From Cavity Solar Receivers-Comparisons Between Analytical Predictions and Experimental Results,” J. Sol. Energy Eng., 105, pp. 29–33.
Clausing,  A. M., Waldvogel,  J. M., and Lister,  L. D., 1987, “Natural Convection From Isothermal Cubical Cavities With a Variety of Side Facing Apertures,” ASME J. Heat Transfer Trans. , 109, pp. 407–412.
Harris,  J. A., and Lenz,  T. G., 1985, “Thermal Performance of Concentrator/Cavity Receiver Systems,” Sol. Energy, 34(2), pp. 135–142.
Koenig, A. A., and Marvin, M., 1981, “Convection Heat Loss Sensitivity in Open Cavity Solar Receivers,” Final report, DOE contract No. EG77-C-04-3985, Department of Energy, Oak Ridge, Tennessee.
Stine, W. B., and McDonald, C. G., 1989, “Cavity Receiver Heat Loss Measurements,” Proc. of ISES World Congress, Kobe, Japan.
Leibfried,  U., and Ortjohann,  J., 1995, “Convective Heat Loss From Upward and Downward-Facing Cavity Solar Receivers: Measurements and Calculations,” J. Sol. Energy Eng., 117, pp. 75–84.
Dalziel,  S. B., Hughes,  G. O., and Sutherland,  B. R., 2000, “Whole-Field Density Measurements by ‘Synthetic Schlieren,’ ” Exp. Fluids, 28, pp. 322–335.
Dalziel,  S. B., 1992, “Decay of Rotating Turbulence: Some Particle Tracking Experiments,” Appl. Sci. Res., 49, pp. 217–244.
Holman, J. P., 1997, Heat Transfer, 8th ed., McGraw-Hill, New York.
McDonald, C. G., 1995, “Heat Loss from an Open Cavity,” Sandia National Laboratories, California.
Fluent Inc., 2002, Fluent 6 User Guide.
Spalart,  P. R., 2000, “Strategies for Turbulent Modeling and Simulations,” Int. J. Heat Fluid Flow, 21, pp. 252–263.

Figures

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Cross section sketch of model receiver
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Cavity division for radiation calculation and thermocouple location
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Schematic diagram of flow configuration: (a) receiver location in the domain, (b) receiver close up
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Typical computational grid
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Experimental heat loss with Tc=445 degC and fully open cavity
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Convection heat loss from a fully open cavity
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Convection heat loss for various exposure ratios with Tc=445 deg C
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Schlieren images at a receiver angle of 0 deg, with Tc=445 degC and fully open cavity: (a) instantaneous (b) average
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Flow images for Tc=445 degC and fully open cavity: (a)-(c) Schlieren images, (d)-(f ) numerical temperature contour plots, (g)-(i) numerical velocity contour plots
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Aperture region flow images for Tc=445 degC and fully open cavity: (a)-(c) Schlieren images, (d)-(f ) numerical temperature contour plots, (g)-(i) aperture normal velocity profiles
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Comparison of natural convection heat loss for Tc=445 degC and fully open cavity
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Comparison of natural convection heat loss with Tc=445 degC and fully open cavity
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Comparison of natural convection heat loss with Tc=445 degC and Rexp=0.75

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