The full load loss 131 kw loss dissipation due to


The tank of 1250 kVA, natural oil cooled transformer has the dimensions length, width and height as 0.65 x 1.55 x 1.85 m respectively. The full load loss = 13.1 kW, loss dissipation due to radiations = 6 W / m2-°C, loss dissipation due to convection = 6.5 W / m2°C, improvement in convection due to provision of tubes = 40%, temperature rise = 40°C, length of each tube = 1m, diameter of tube = 50mm. Find the number of tubes for this transformer.

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Electrical Engineering: The full load loss 131 kw loss dissipation due to
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