A 20 kW, 220 volt, single phase resistance oven uses circular nichrome wire as its heating element. If the temperature of the wire is 1127° and the temperature of the charge is 427°, find the diameter and length of the wire required. Assume radiating efficiency 0.6 and emissivity 0.9. The specific resistance of nichrome alloy

A 20 kW, 220 volt, single phase resistance oven uses circular nichrome wire as its heating element. If the temperature of the wire is 1127° and the temperature of the charge is 427°, find the diameter and length of the wire required. Assume radiating efficiency 0.6 and emissivity 0.9. The specific resistance of nichrome alloy

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter12: Electronic Control Devices

Section: Chapter Questions

Problem 14RQ

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