On the application of the exponential wide band model to the calculation of radiative heat transfer in one- and two-dimensional enclosures |
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Authors: | Jochen Strö hle,Pedro J. Coelho |
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Affiliation: | a Institute of Process Engineering and Power Plant Technology, University of Stuttgart, Pfaffenwaldring 23, Stuttgart D-70550, Germany b Instituto Superior Técnico, Technical University of Lisbon, Av. Rovisco Pais, Lisboa 1049-001, Portugal |
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Abstract: | Various implementations of the exponential wide band model (EWBM) are used to model radiative heat transfer in one- and two-dimensional enclosures containing CO2 and H2O. These are, first, the original banded approach using the four-region approximation for the total band absorption, second, a numerical integration of the spectral transmittance, and third, the wide band correlated k-distribution method (CKM). A correlated and a non-correlated formulation are used to solve the radiative transfer equation. In two-dimensional enclosures, these formulations are implemented using a ray tracing method (RTM) and the discrete ordinates method (DOM), respectively. The wide band CKM is found to be the best choice concerning accuracy and computational effort. |
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Keywords: | Heat transfer Modeling Radiation |
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