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Heat and Mass Transfer

, Volume 54, Issue 5, pp 1267–1279 | Cite as

Parametric analyses of DEMO Divertor using two dimensional transient thermal hydraulic modelling

  • Phani Domalapally
  • Marco Di Caro
Original

Abstract

Among the options considered for cooling of the Plasma facing components of the DEMO reactor, water cooling is a conservative option because of its high heat removal capability. In this work a two-dimensional transient thermal hydraulic code is developed to support the design of the divertor for the projected DEMO reactor with water as a coolant. The mathematical model accounts for transient 2D heat conduction in the divertor section. Temperature-dependent properties are used for more accurate analysis. Correlations for single phase flow forced convection, partially developed subcooled nucleate boiling, fully developed subcooled nucleate boiling and film boiling are used to calculate the heat transfer coefficients on the channel side considering the swirl flow, wherein different correlations found in the literature are compared against each other. Correlation for the Critical Heat Flux is used to estimate its limit for a given flow conditions. This paper then investigates the results of the parametric analysis performed, whereby flow velocity, diameter of the coolant channel, thickness of the coolant pipe, thickness of the armor material, inlet temperature and operating pressure affect the behavior of the divertor under steady or transient heat fluxes. This code will help in understanding the basic parameters´ effect on the behavior of the divertor, to achieve a better design from a thermal hydraulic point of view.

Notes

Acknowledgements

This work has been also supported by a grant no. MSMT-41274/2014-2 from the Ministry of Education, Youth and Sports of the Czech Republic, for which the author is thankful. The author is also thankful to Ing. Karel Samec for reading the first draft of the paper and providing valuable suggestions.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2017

Authors and Affiliations

  1. 1.Research Centre RezRezCzech Republic

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