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ISSN Online: 2377-424X

ISBN Print: 0-89116-299-2

International Heat Transfer Conference 7
September, 6-10, 1982, Munich, Germany

EFFECTIVE ENERGY CONVERSION METHOD BETWEEN GAS ENTHALPY AND THERMAL RADIATION AND APPLICATION TO INDUSTRIAL FURNACES

Get access (open in a dialog) DOI: 10.1615/IHTC7.2500
pages 361-366

Résumé

This paper presents an effective energy conversion method from flowing gas enthalpy to thermal radiation emitted from the permeable wall of an appropriate optical thickness placed in a duct. A theoretical study shows a drastic change of flowing gas enthalpy and the major amount of converted radiant energy to be directed toward the upstream direction which are confirmed by the subsequent experiment relevant to a basic heat transfer system. The other features embodied in the system are summarized as; the preferable pressure loss in better perspective of controlling the flow distribution, the prompt thermal response due to the small thermal inertia of the permeable medium, the reverse conversion from thermal radiation to enthalpy increase of flowing gas, the formation of high and uniform temperature boundary in an arbitrary configuration, etc. The conversion technique has been successfully applied to an experimental furnace for steel making process, in which the energy consumption rate is reduced by as much as 60 % that of the conventional heating.