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This final report describes the results of a study to gain a more fundamental insight into the heat balance of a vacuum vessel (type RH-OB). The research programme was based on temperature measurements in the lining of the vessel and modelling of the heat fluxes through the lining. The model developed is a two-dimensional finite difference model able to perform dynamic calculations of the heat flux through a wall. By choosing cylinder coordinates it is possible to get a quasi three-dimenisonal model of (almost) rotational symmetric objects. Calculations can be done with several boundary conditions: radiation and convection on the outside of the vessel and radiation, convection and forced temperature on the inside. In order to model the radiation the zonal method of Hottel was used. The data acquired by the temperature measurements were also used for strain calculations performed for the lining of the lower vessel. Stresses, resulting from dilatation of the refractory material, were calculated for several specific moments during heating and operation. The results showed that during heating relatively high stresses occur in the isolation lining and board, compared to the strength of these matirials. This would give a plausible cause for problems encountered in practice.

Additional information

Authors: FLIPSEN R F, Hoogovens Groep BV, Ijmuiden (NL)
Bibliographic Reference: EUR 15596 EN (1996) 64pp., FS, ECU 11.50
Availability: Available from the (2)
ISBN: ISBN 92-827-6478-8
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