دانلود مقاله ISI انگلیسی شماره 57521
ترجمه فارسی عنوان مقاله

مدل سازی عددی از تهویه طبیعی پستهای ترانسفورماتور زیرزمینی

عنوان انگلیسی
Numerical modelling of the natural ventilation of underground transformer substations
کد مقاله سال انتشار تعداد صفحات مقاله انگلیسی
57521 2013 12 صفحه PDF
منبع

Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)

Journal : Applied Thermal Engineering, Volume 51, Issues 1–2, March 2013, Pages 852–863

ترجمه کلمات کلیدی
مدل سازی حرارتی؛ ترانسفورماتور - تهویه طبیعی؛ CFD
کلمات کلیدی انگلیسی
Thermal modelling; Transformer substation; Natural ventilation; CFD
پیش نمایش مقاله
پیش نمایش مقاله  مدل سازی عددی از تهویه طبیعی پستهای ترانسفورماتور زیرزمینی

چکیده انگلیسی

Ventilation by natural convection of two underground transformer substations has been numerically modelled. The model has been verified in terms of discretization errors and it has been validated with the experimental results of eight temperature rise tests carried out under different conditions of ventilation and transformer power losses. The results of the simulations serve to analyse the air flow pattern and the air temperature distributions inside the substation. A correlation for the air mass flow rate as a function of the ventilation conditions (discharge coefficient and area of the grilles) and the heat dissipated by the transformer has been fitted. The heat transfer coefficients on the surfaces of the transformer and the walls of the enclosure can also be obtained from the simulations of the model. All this information will be used in a future paper to develop a zonal thermal model of the ventilation of the substations that can be employed as a design and optimisation tool.