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TECHNICAL BRIEF

Radiative Exchange Within a Two-Cavity Configuration With a Spectrally Selective Window

[+] Author and Article Information
A. Z’Graggen

Department of Mechanical and Process Engineering, ETH-Swiss Federal Institute of Technology, CH-8092 Zurich, Switzerland

A. Steinfeld

Department of Mechanical and Process Engineering, ETH-Swiss Federal Institute of Technology, CH-8092 Zurich, Switzerland Solar Process Technology, Paul Scherrer Institute, CH-5232 Villigen, Switzerland

J. Sol. Energy Eng 126(2), 819-822 (May 04, 2004) (4 pages) doi:10.1115/1.1643751 History: Received August 01, 2003; Revised November 01, 2003; Online May 04, 2004
Copyright © 2004 by ASME
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References

Steinfeld, A., and Palumbo, R., 2001, “Solar Thermochemical Process Technology,” in Encyclopedia of Physical Science and Technology, R. A. Meyers, Ed., Academic Press, 15 , pp. 237–256.
Siegel, R., and Howell, J. R., 1992, Thermal Radiation Heat Transfer, 3rd Ed., Hemisphere Publishing Corporation, Washington, D.C.
Lin,  S., and Sparrow,  E., 1965, “Radiant Interchange Among Curved Specularly Reflecting Surfaces—Application to Cylindrical and Conical Cavities,” J. Heat Transfer, pp. 299–307.
Steinfeld,  A., 1991, “Apparent Absorptance for Diffusely and Specularly Reflecting Spherical Cavities,” Int. J. Heat Mass Transfer, 34, pp. 1895–1897.
Haueter,  P., Moeller,  S., Palumbo,  R., and Steinfeld,  A., 1999, “The Production of Zinc by Thermal Dissociation of Zinc Oxide—Solar Chemical Reactor Design,” Sol. Energy, 67, pp. 161–167.
Kräupl,  S., and Steinfeld,  A., 2003, “Operational Performance of a 5 kW Solar Chemical Reactor for the Co-Production of Zinc and Syngas,” ASME J. Sol. Energy Eng., 125, pp. 124–126.
Möller, S., Buck, R., Tamme, R., Epstein, M., Liebermann, D., Moshe, Meri, Fisher, U., Rotstein, A., and Sugarmen, C., 2003, “Solar Production of Syngas for Electricity Generation: SOLASYS Project Test-Phase,” Proc. of the 11th Solar PACES Int. Symp. on concentrated Solar Power and Chemical Energy Technologies, A. Steinfeld, Ed., Zurich, pp. 231–237.
Schaffner,  B., Meier,  A., Wuillemin,  D., Hoffelner,  W., and Steinfeld,  A., 2003, “Recycling of Hazardous Solid Waste Material Using High-Temperature Solar Process Heat—II. Reactor Design and Experimentation,” Environ. Sci. Technol., 37, pp. 165–170.
Osinga, T., Frommherz, U., Steinfeld, A., and Wieckert, C., “Experimental Investigation of the Solar Carbothermic Reduction of ZnO Using a Two-Cavity Solar Reactor,” ASME J. Sol. Energy Eng., in press.
Wieckert,  C., Meier,  A., and Steinfeld,  A., 2003, “On Indirectly Irradiated Solar Receiver-Reactors for High-Temperature Thermochemical Processes,” ASME J. Sol. Energy Eng., 125, pp. 120–123.

Figures

Grahic Jump Location
Schematic of the two-cavity reactor configuration
Grahic Jump Location
Variation of the energy absorption efficiency η as a function of T4/Tmax for the baseline parameters and for A2/A0=1, 3, ∞. Solid lines: no window; dotted lines: window properties of Table 1.
Grahic Jump Location
Surface temperatures as a function of the energy absorption efficiency, for the baseline parameters and A2/A0=10. Solid lines: no window; dotted lines: window properties of Table 1.
Grahic Jump Location
Percentage of emitted, transmitted, and reflected radiation losses by the window, as a function of its temperature T1, for the baseline parameters and A2/A0=10

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