Original scientific paper

Temperature transitional phenomena in spherical reservoir wall

Pavo Baličević ; J. J. Strossmayer University of Osijek, Faculty of Agriculture, Trg Sv. Trojstva 3, 31000 Osijek, Croatia
Željko Ivandić ; J. J. Strossmayer University of Osijek, Faculty of Mechanical Engineering, Trg Ivane Brlić Mažuranić 2, 35000 Slavonski Brod, Croatia
Drago Kraljević ; J. J. Strossmayer University of Osijek, Faculty of Agriculture, Trg Sv. Trojstva 3, 31000 Osijek, Croatia

Abstract

Uneven and non-stationary temperature field is formed in the reservoir wall while loading pressure reservoir with a liquefied gas in cooling state, at a temperature lower than the saturation temperature at given pressure. Mathematical model of the temperature field is developed by setting and solving differential equation of heat diffusion in the spherical wall in real conditions of the wall getting cold. The model enables computation of the temperature gradient attaining very high values at the liquid level. A simplified procedure for calculating the wall temperature increase in the narrow area above the liquid level was also developed. Understanding of the temperature field in the reservoir wall allows further heat stresses calculation. For this purpose, a temperature discontinuity should be approximated by a continuous function. Approximation was applied by Fourier's orders, and coefficients of an order are determined by the electronic computer program. The model application procedure has been illustrated by the example of spherical pressure reservoir for liquefied carbon dioxide.

Keywords

liquefied gas; spherical reservoir; temperature field

Hrčak ID:

50602

URI

https://hrcak.srce.hr/50602

Publication date:

31.3.2010.

Article data in other languages: croatian

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