Heat Transfered from plate to plate
Heat Transfered from plate to plate
(OP)
I have a problem with heat from a 1800 degree hot slab
Size 82" X 132" (9" thick)
Stefan - Boltzman Constant .174E-8
2227 Temp in Rankine
Area = 75.167
I used Q=.174E-8 * Area Ft^2 * Temp ^4
Q= 3.217E+6 in BTU / Hr.
Directly above this slab I have an air space of about 4.5" and then I have a heat shield with the same size as the slab
about 1" thick. I figure the slab will radiate heat and assumed it to be a black body. Would anyone know what formula I would use to get a rough estimate of the temperature on the surface of the heat shield? The heat shield is a piece of carbon steel plate.
Thanks in advance for your help,
John
Size 82" X 132" (9" thick)
Stefan - Boltzman Constant .174E-8
2227 Temp in Rankine
Area = 75.167
I used Q=.174E-8 * Area Ft^2 * Temp ^4
Q= 3.217E+6 in BTU / Hr.
Directly above this slab I have an air space of about 4.5" and then I have a heat shield with the same size as the slab
about 1" thick. I figure the slab will radiate heat and assumed it to be a black body. Would anyone know what formula I would use to get a rough estimate of the temperature on the surface of the heat shield? The heat shield is a piece of carbon steel plate.
Thanks in advance for your help,
John





RE: Heat Transfered from plate to plate
Depending on the material in the heat shield, you should also include a convection/conduction term, for completeness.
You then need to figure out how much heat flow the slab can sustain. It's usually the solution to these two simultaneous constraints that determines the surface temperature.
TTFN
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RE: Heat Transfered from plate to plate
corus
RE: Heat Transfered from plate to plate
What does the
"2227 Temp in Rankine refer to?
RE: Heat Transfered from plate to plate
It looks like he accidentally subtracted 32 degrees when converting from F to R.