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Finite-element heat-transfer computations for parallel surfaces with uniform or non-uniform emitting.

Ivanova, S. M.; Muneer, T.

Authors

S. M. Ivanova



Abstract

Radiation heat transfer has very many applications in building physics. In such studies, one has to deal with radiant energy exchanges between surfaces of different orientation and aspects. Two principal cases that may be cited here are exchanges between (i) surfaces that share a common edge and are at an angle to each other, and (ii) surfaces that are parallel to each other. Examples that may be cited here are walls of buildings and also ceiling and floor areas. In a previous work, the authors presented a generalised, numerical-oriented solution for analysing radiant exchange that belongs to case (i) cited above. In the present article, a generalised treatment for case (ii) is presented. A software tool is also provided for analysing the radiant exchange for surfaces that are parallel to each other and have uniform or non-uniform reflectivity, incident irradiation and/or emission. As a demonstration of the applicability of the present work, calculation of incident reflected irradiation on the walls of urban street canyons with varied orientation and non-uniform reflectivity is presented. Finally, the application of the presently developed tools for enhancing building design has been highlighted.

Journal Article Type Article
Acceptance Date Jan 1, 2016
Online Publication Date Jan 23, 2016
Publication Date 2016-02
Deposit Date Feb 26, 2016
Publicly Available Date Nov 29, 2017
Journal Journal of Renewable and Sustainable Energy
Electronic ISSN 1941-7012
Publisher AIP Publishing
Peer Reviewed Peer Reviewed
Volume 8
Issue 1
Pages 15102
DOI https://doi.org/10.1063/1.4942543
Keywords Albedo; facades; solar radiation; finite element methods; irradiance;
Public URL http://researchrepository.napier.ac.uk/id/eprint/9572
Publisher URL http://dx.doi.org/10.1063/1.4942543
Contract Date Nov 29, 2017