A resistance oven employing nichrome wire is to be operated from 220 V single- phase supply and is to be rated at 16kW. If the temperature of the element is to be limited to 1,270 °C and average temperature of the charge is 400 °C, find the diameter and length of the element wire. Radiating efficiency = 0.37, emissivity = 0.8, specific resistance of nichrome (109 10-8) ohm-m.
A resistance oven employing nichrome wire is to be operated from 220 V single- phase supply and is to be rated at 16kW. If the temperature of the element is to be limited to 1,270 °C and average temperature of the charge is 400 °C, find the diameter and length of the element wire. Radiating efficiency = 0.37, emissivity = 0.8, specific resistance of nichrome (109 10-8) ohm-m.
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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