Determine the percent in heat flux if, in addition to the conditions specified in Problem 17.11, there
Question:
Determine the percent in heat flux if, in addition to the conditions specified in Problem 17.11, there are two 3/4-in.- diameter steel bolts extending through the wall per square foot of wall area (k for steel = 22 Btu/h ft °F).
Data From Problem 17.11
A heater composed of Nichrome wire wound back and forth and closely spaced is covered on both sides with 1/8 - in. thickness of asbestos (k = 0.15 Btu/h ft °F) and then with a 1/8 -in. thickness of stainless steel (k = 10 Btu/h ft °F). If the center temperature of this sandwich construction is considered constant at 1000°F and the outside convective heat-transfer coefficient is 3 Btu/h ft2 °F, how much energy must be supplied in W/ft2 to the heater? What will be the outside temperature of the stainless steel?
Step by Step Answer:
Fundamentals Of Momentum Heat And Mass Transfer
ISBN: 9781118947463
6th Edition
Authors: James Welty, Gregory L. Rorrer, David G. Foster