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Entropy 2012, 14(4), 717-735; doi:10.3390/e14040717
Article

Entropy Generation During the Interaction of Thermal Radiation with a Surface

1,*  and 2
1 Institut für Thermodynamik, Leibniz Universität Hannover, Callinstr. 36, D-30167 Hannover, Germany 2 Institut für Thermodynamik, Helmut-Schmidt-Universität, Universität der Bundeswehr Hamburg, D 22039 Hamburg, Germany
* Author to whom correspondence should be addressed.
Received: 15 February 2012 / Revised: 27 March 2012 / Accepted: 27 March 2012 / Published: 11 April 2012
(This article belongs to the Special Issue Entropy Generation Minimization)
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Abstract

The entropy calculation for radiation fluxes is reviewed and applied to simple radiation-surface interactions. A plate interacting with radiation from a hot object in the zenith of the hemisphere surrounded by a colder atmosphere is analyzed in detail. The entropy generation rate upon absorption and reflection of the incoming radiation is calculated and discussed. The plate is adiabatic in a first version (thermal equilibrium), then its temperature is fixed by allowing a heat flux to or from the plate. This analysis prepares the way towards an entropy generation minimization analysis of more complex radiation settings.
Keywords: thermal radiation; reflection; absorption; entropy production thermal radiation; reflection; absorption; entropy production
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Kabelac, S.; Conrad, R. Entropy Generation During the Interaction of Thermal Radiation with a Surface. Entropy 2012, 14, 717-735.

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