Effect of fan arrangement and air flow direction on thermal performance of radiators in a power transformer
Abstract
The focus of the present numerical work is to study the effect of fan air flow direction and mounting arrangement on the thermalperformance of the radiators of power transformers using Computational Fluid Dynamics analysis. The study is carried outfor four radiators of 3 m height and 30 fins with 0.52 m width and two fans of 1 m diameter in vertical and horizontal airflow directions. The horizontal flows from the two fans are considered in the same and the opposite direction, with the fanslocated on the same and the opposite side, respectively running at the same speed of 860 rpm for all configurations. Thermalradiation is modelled using the discrete transfer radiation model. A comparison of different flow and heat transfer patterns aswell as heat dissipation—for the four different configurations—is presented. Velocity and temperature contours are used tovisualize the heat and fluid flow distribution over the radiators. Fans placed on one side of the radiators result in larger heatdissipation than the other arrangements studied. The reasons for the improvement in heat dissipation are presented.References
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effect in a power transformer, in: Transmission & Distribution Conference
& Exposition: Asia and Pacific, 2009, IEEE, 2009, pp. 1–4.
[2] H. Nabati, J. Mahmoudi, A. Ehteram, Heat transfer and fluid flow analysis
of power transformer’s cooling system using cfd approach, Chemical
Product and Process Modeling 4 (1) (2009) 1934–2659.
[3] E. I. Amoiralis, P. S. Georgilakis, M. A. Tsili, A. G. Kladas, Global
transformer optimization method using evolutionary design and numerical
field computation, Magnetics, IEEE Transactions on 45 (3) (2009)
1720–1723.
[4] R. B. Fdhila, E. Kranenborg, T. Laneryd, C.-O. Olsson, B. Samuelsson,
A. Gustafsson, L. Lundin, Thermal modeling of power transformer radiators
using a porous medium based cfd approach, in: Second International
Conference on Computational Methods for Thermal Problems,
Dalian, China, 2011.
[5] J. Gastelurrutia, J. C. Ramos, G. S. Larraona, A. Rivas, J. Izagirre,
L. Del Río, Numerical modelling of natural convection of oil inside distribution
transformers, Applied Thermal Engineering 31 (4) (2011) 493–
505.
[6] C. Olsson, Buoyancy driven flow in counter flow heat exchangers, in:
6th European Thermal Sciences Conference, Poitiers, France, 2012,
pp. 1–8.
[7] M.-g. Kim, S. M. Cho, J.-K. Kim, Prediction and evaluation of the cooling
performance of radiators used in oil-filled power transformer applications
with non-direct and direct-oil-forced flow, Experimental Thermal
and Fluid Science 44 (2013) 392–397.
[8] S. B. Paramane, K. Joshi, W. Van der Veken, A. Sharma, Cfd study
on thermal performance of radiators in a power transformer: Effect of
blowing direction and offset of fans, Power Delivery, IEEE Transactions
on 29 (6) (2014) 2596–2604.
[9] W. Van der Veken, S. Paramane, R. Mertens, V. Chandak, J. Codde,
Increased efficiency of thermal calculations via the development of a
full thermohydraulic radiator model, IEEE Transactions on Power DeliveryAccepted
for publication.
[10] ANSYS 2009. CFX manual. Theory. Version 12.1.
[11] T. Zitzmann, P. Pfrommer, M. Cook, Dynamic thermal building analysis
with cfd–modelling radiation, Proceedings: Building Simulation,
Beijing, China (2007) 31–38.
Published
2017-07-21
How to Cite
PARAMANE, Sachin B. et al.
Effect of fan arrangement and air flow direction on thermal performance of radiators in a power transformer.
Journal of Power Technologies, [S.l.], v. 97, n. 2, p. 127--134, july 2017.
ISSN 2083-4195.
Available at: <https://papers.itc.pw.edu.pl/index.php/JPT/article/view/724>. Date accessed: 21 dec. 2024.
Issue
Section
Thermodynamics
Keywords
radiators, fan arrangement, cross flow, heat dissipation, CFD, flow distribution, transformer cooling
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