Heat Transfer ? - Steel Tube/Duct
Heat Transfer ? - Steel Tube/Duct
(OP)
Duct is a 8” x 8” steel square tube with 0.3125” wall thickness, 200” long.
Duct weight 742 lbs.
One end is capped off and the other end is capped off except it has a 4" OD inlet opening.
An external heat source will be used to pump heated air through 4" OD opening in the tube.
The duct is placed in -40 degrees F outside still air.
Determine overall BTu's per hour to heat the steel from inside to out to bring the outer surface from the -40 to 32F
Determine the required forced air temperature of heat source on inside of duct to maintain outer surface at 32F
Duct weight 742 lbs.
One end is capped off and the other end is capped off except it has a 4" OD inlet opening.
An external heat source will be used to pump heated air through 4" OD opening in the tube.
The duct is placed in -40 degrees F outside still air.
Determine overall BTu's per hour to heat the steel from inside to out to bring the outer surface from the -40 to 32F
Determine the required forced air temperature of heat source on inside of duct to maintain outer surface at 32F





RE: Heat Transfer ? - Steel Tube/Duct
B.E.
The good engineer does not need to memorize every formula; he just needs to know where he can find them when he needs them. Old professor
RE: Heat Transfer ? - Steel Tube/Duct
RE: Heat Transfer ? - Steel Tube/Duct
B.E.
http://www.roymech.co.uk/Related/Thermos/Thermos_H...
The good engineer does not need to memorize every formula; he just needs to know where he can find them when he needs them. Old professor
RE: Heat Transfer ? - Steel Tube/Duct
RE: Heat Transfer ? - Steel Tube/Duct
I'm assuming that since you've been here a while, you'd have to be a super-senior times 3 to still be a student, yet your problem statement is couched precisely the way homework problems would be formulated.
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RE: Heat Transfer ? - Steel Tube/Duct
RE: Heat Transfer ? - Steel Tube/Duct