2D Thermal simulation of a mixed convection cooled power transformer and its analysis of the flow dynamics affecting the cooling of the windings | |
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( Volume 4 Issue 1,January 2018 ) OPEN ACCESS | |
Author(s): | |
Alejandro Roberto Tello Campos, Saul Garcia Hernandez, William Vicente, Ignacio Carvajal Mariscal, Rodrigo Ocon Valdez | |
Abstract: | |
A 2D CFD study of the fluid dynamic behavior of the cooling oil under fixed heat dissipation conditions is considered valuable in vertical and horizontal cooling ducts in a real three-phase 33.6 MVA, 115/34.5 kV power transformer when varying the inlet oil velocity. The outcome of this CFD study is an evaluation of the thermal behavior regarding the fluid dynamics of the cooling oil and the implications of having different oil inlet velocities in the cooling of the power transformer phases. The results show a clear dependence of the cooling of the windings on the oil inlet velocities and shows the deficiency of the external radiator system and ways to improve it. Specifically, according to the oil temperatures found in the phases, there is a tendency to have the highest values in the windings located away from the oil inlet. Also, when the oil velocity reaches 0.1 m/s, the highest oil temperature in Phase C is 323 K as opposed to when the oil velocity is 0.002 m/s, the oil temperature is 400 K. |
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