کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
649661 884666 2007 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enhanced numerical model of performance of an encapsulated three-phase transformer in laboratory environment
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Enhanced numerical model of performance of an encapsulated three-phase transformer in laboratory environment
چکیده انگلیسی

The paper presents a numerical thermal model of an encapsulated three-phase electrical transformer. This model is based on the coupled approach and involves a heat transfer analysis coupled with the examination of the specific power losses within the coils and the core, determined from a detailed analysis of the electromagnetic field. The thermal boundary conditions, i.e. local heat fluxes, are determined by considering a numerical model of the surrounding air. Additionally, the device is cooled via forced convection (water cooling system) and radiation (from the external walls). Moreover, for stranded coils and the core, anisotropic material properties were assumed. Results of the presented coupled analysis show that the temperature distribution within the transformer is more realistic and closer to the measurements when compared to the previous analysis limited to heat transfer problems with uniform internal heat sources and isotropic material properties only. The total heat transfer rate indicates that forced convection is the most important heat dissipation mechanism in this model.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 27, Issue 1, January 2007, Pages 156–166
نویسندگان
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