Design optimization study for an infrared heater using CFD and sensitivity analysis

O. Hojer, J. Basta, J.L.M. Hensen

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Abstract

Sensitivity analysis (SA) has become a very popular technique for various application areas. However, not many studies concern SA using CFD (computational fluid dynamics). The main problem appears to be the large number of model executions when using the Monte Carlo method of SA. The computing resources and time needed for such a SA in combination with CFD (in which one model execution could take several hours) can be enormous. Nevertheless, this paper describes an approach of using SA in such cases. The recommendations are obvious: simplifying the model as much as possible; considering just a key part of the model; and take more care about the speed of convergence. On this basis a case study on "Optimization of gas infrared heater radiation geometry" has been performed. The most interesting result is that the shape of the heater and the reflector material do not significantly influence the heat delivery to the occupied zone. The main conclusion is that Monte Carlo sensitivity analysis is not suitable for large CFD models with low level of abstraction. In order to obtain good results, we recommend to select a smaller part of the overall domain and/or to significantly simplify it.
Original languageEnglish
Title of host publicationProceedings of the SCANVAC Roomvent 2007 Conference, 13-15 June 2007, Helsinki, Finland
EditorsO. Seppänen, J. Säteri
Place of PublicationHelsinki, Finland
PublisherFINVAC
Pages9-pages
ISBN (Print)978-952-99898-0-5
Publication statusPublished - 2007
Event10th International Conference on Air Distribution in Rooms (ROOMVENT 2007) - Helsinki, Finland
Duration: 13 Jun 200715 Jun 2007
Conference number: 10

Conference

Conference10th International Conference on Air Distribution in Rooms (ROOMVENT 2007)
Abbreviated titleROOMVENT 2007
CountryFinland
CityHelsinki
Period13/06/0715/06/07

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