Numerical modelling and analysis of cooling system of electrical transformer dipped into polymerised resin

• Autorzy: Smołka J. , Nowak A. J. , Wrobel L. C.
• Języki publikacji: EN

Abstrakty

EN

This paper discusses a numerical model of the heat dissipation processes in an electrical transformer dipped into polymerised resin. The transformer is cooled by both natural convection (via the ambient air) and forced convection (via the water cooling system attached to one of the transformer casing walls). Two cases have been compared, i.e. the cooler connected to the bottom or the top wall of the transformer container, respectively. In order to improve the modelling of the natural convection problem, an independent geometrical model of the surrounding air was created and considered separately. The continuity of temperature and heat flux along the interface between the transformer and air was enforced by an iterative procedure. This procedure allowed one to calculate and then prescribe local heat fluxes to the external walls of the transformer. The numerical results obtained in this project have yielded information on the efficiency of the analysed cooling system.

Słowa kluczowe

EN

dry electrical transformer; heat transfer; natural convection; coupled analysis

• Wydawca: Politechnika Gdańska
• Czasopismo: TASK Quarterly : scientific bulletin of Academic Computer Centre in Gdansk
• Rocznik: 2003
• Tom: Vol. 7, No 3
• Strony: 439--448
• Opis fizyczny: Bibliogr. 10 poz., rys., tab.

Twórcy

autor

Smołka J.

• Institite of Thermal Technology, Silesian University of Technology, Konarskiego 22, 44-100 Gliwice, Poland

autor

Nowak A. J.

• Institite of Thermal Technology, Silesian University of Technology, Konarskiego 22, 44-100 Gliwice, Poland

autor

Wrobel L. C.

• Department of Mechanical Engineering, Brunel University, Uxbridge UB8 3PH, United Kingdom

• Institite of Thermal Technology, Silesian University of Technology, Konarskiego 22, 44-100 Gliwice, Poland,

Bibliografia

• [1] Altman G and Pfeiffer R 1984 Siemens Power Engng.6(3) 194
• [2] Le Roy G and Sandoz F 1985 Proc. 8th Int. Conf. Electricity Distribution, CIRED, IEE, UK,pp. 71–76
• [3] McLyman W T 1998 Transformer and Inductor Design Handbook, Marcel Dekker, USA
• [4] Kuhn M, Langer U and Schoberl J 1999 Proc. 10th Conf. Mathematics of Finite Elementsand Applications, MAFELAP X, Brunel University, UK, pp. 239–258
• [5] 1997–2002 FLUENTUser’s Guide, Fluent Inc., Lebanon, USA
• [6] Smołka J, Nowak A J, Wrobel L C and Sobczyk J 2001 Scientific Notebooks. Mechanics,Warsaw University of Technology, Warsaw, Poland 190261
• [7] Smołka J, Nowak A J and Wrobel L C 2002 Computers and Fluids(submitted)
• [8] Smołka J 2001 Thermal Process Analysis in an Electrical Transformer Dipped into Polymer-ized Resin, MSc Thesis, Silesian University of Technology, Gliwice, Poland – Brunel University, Uxbridge, UK
• [9] Ozisik M N 1985 Heat Transfer. A Basic Approach, McGraw-Hill, USA
• [10] Anderson J D Jr 1995 Computational Fluid Dynamics. The Basics with Applications, McGraw-Hill, USA