Question in (Conduction ) A steel plate 2 cm thick

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A steel plate 2 cm thick is maintained at temperatures of 550°C and 50°C on opposite faces, with a thermal conductivity of 19.1 W/mK at 300°C. The heat transfer through the material is calculated using the formula q = -k . A . (dt/dx). The computed heat transfer per unit area is 477.5 W/m², but there are concerns that the problem statement should specify "per unit area" and that the answer may be off by a factor of 1000. Clarification on the variables used in the calculations is requested to ensure accurate understanding.
manal950
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Hi

A steel plate 2 cm thick is maintained at a temperature of 550 C at one face and 50 C on the other .
The thermal conductivity of stainless stress at 300 C is 19.1 W/mK .

Compute the heat transferred through the material per unit length ?

Answer : -

we have q = - k . A . (dt/dx)

now
q = - k . (l.h) . (dt/dx)

q / (l.h) = -k( (dt/dx) )
= 477.5 w/m^2
 
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There is something wrong with the problem statement. It should be "per unit area". Also, it looks like the answer is off by a factor of 1000.
 
Pls explains your variables in the context of the problem.
 
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