MODELING A BOILING PROCESS UNDER UNCERTAINTIES

Authors

  • DANIEL Fiss IPM, Zittau/Goerlitz University of Applied Sciences, Theodor-Koerner-Allee 16, Zittau, D-02763, Germany
  • MICHAEL Wagenknecht IPM, Zittau/Goerlitz University of Applied Sciences, Theodor-Koerner-Allee 16, Zittau, D-02763, Germany
  • RAINER Hampel IPM, Zittau/Goerlitz University of Applied Sciences, Theodor-Koerner-Allee 16, Zittau, D-02763, Germany

Keywords:

the process of boiling, heat transfer, dynamic simulation of boiling, fuzzy model of Takagi Sugeno

Abstract

The heat transfer during boiling depends on a variety of factors (boiling stage, material parameters,
geometrical parameters, state variables and flow conditions). All variations are based on empirical relationships
gained from experimental data because there is still no comprehensive theory. With increasing wall superheat
(Tw-Ts), the evaporation changes from convective boiling to nucleate boiling and then to film boiling. For each type
of boiling, separate equations for the calculation of the heat transfer coefficient do exist. This paper presents
possibilities to take account of the existing uncertainties in the dynamic simulation of boiling. For this reason a
Takagi-Sugeno-fuzzy-model was developed which includes the fuzzy transitions between the boiling stages.

References

1 Kandlikar S.G. Handbook of phase change: boiling and condensation / S.G.Kandlikar // Taylor & Francis. – 1999.
2 Stephan K. Wärmeübergang beim Kondensieren und beim Sieden / K.Stephan // Springer-Verlag, Berlin Heidelberg. – 1988
3 Gorenflo D. VDI Heat Atlas, chapter Hab / D.Gorenflo // Springer-Verlag, Berlin Heidelberg. – 2006.
4 Bromley L.A. Heat Transfer in Stable Film Boiling / L.A.Bromley // Chem. Eng. Progress, v.46, №5. –1950.

Downloads

Published

04.10.2012

How to Cite

Fiss, D., Wagenknecht, M., & Hampel, R. (2012). MODELING A BOILING PROCESS UNDER UNCERTAINTIES. Oil and Gas Power Engineering, (2(18), 136–139. Retrieved from https://nge.nung.edu.ua/index.php/nge/article/view/23

Issue

Section

SCIENCE AND MODERN TECHNOLOGIES