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Influence of Gas-Filled Gaps on the Thermal Behaviour of Dual Purpose Casks

Part of: Design Methods and Tools

Published online by Cambridge University Press:  26 July 2019

Christian Dinkel ,
Daniel Billenstein ,
Frank Rieg  and
Bernd Roith
Christian Dinkel*
Affiliation:
University of Bayreuth;
Daniel Billenstein
Affiliation:
University of Bayreuth;
Frank Rieg
Affiliation:
University of Bayreuth;
Bernd Roith
Affiliation:
Swiss Federal Nuclear Safety Inspectorate ENSI
*
Contact: Dinkel, Christian, University of Bayreuth, Chair of Engineering Design and CAD, Germany, christian.dinkel@uni-bayreuth.de

Abstract

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Basically, the safe dissipation of heat is among others an important protection objective of dual purpose casks. Gas-filled gaps within such casks can play a major role for the thermal behavior as they act as thermal barriers due to the lower heat conductivity of gaseous fluids in comparison to metallic materials. However, additional heat transmission mechanisms, such as natural convection and radiation can also occur in a gaseous medium. This leads to both an expanded modelling and a prolonged computing time in numerical simulations. Within the scope of a research project in cooperation with Swiss Federal Nuclear Safety Inspectorate ENSI a simulation tool for the fast thermal evaluation of dual purpose casks is developed which combines analytical methods and FEA. The innovation is that the thermal effects of gas-filled gaps are considered by using analytical equations. Main focus lies on the implementation of heat radiation as a non-linear transfer mechanism. Therefore, an iterative calculation process is used and the effects of the iteration number is investigated. Furthermore, the influence of radiation in comparison to pure conduction is examined depending on the gap width.

Keywords

SimulationProduct modelling / modelsNumerical methodsThermal Finite-Element AnalysisDual purpose cask
Type
Article
Information
Proceedings of the Design Society: International Conference on Engineering Design , Volume 1 , Issue 1 , July 2019 , pp. 1533 - 1542
Creative Commons
Creative Common License - CCCreative Common License - BYCreative Common License - NCCreative Common License - ND
This is an Open Access article, distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives licence (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is unaltered and is properly cited. The written permission of Cambridge University Press must be obtained for commercial re-use or in order to create a derivative work.
Copyright
© The Author(s) 2019

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