A resistance oven employing nichrome wire is to be operated from 230 V single phase supply and is to be rated at 20 KW. If the temperature of the element is to be limited to 11500C and average temperature of the charge is 5000C. Find the diameter and length of the element wire. Assume radiating efficiency = 0.57, Emissivity = 0.9, Specific resistance of nichrome = 109 x 10-8Ω - m

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A resistance oven employing nichrome wire is to be operated from 230 V single phase supply and is to be rated at 20 KW. If the temperature of the element is to be limited to 11500C and average temperature of the charge is 5000C. Find the diameter and length of the element wire. Assume radiating efficiency = 0.57, Emissivity = 0.9, Specific resistance of nichrome = 109 x 10-8Ω - m
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