Question in (Conduction ) A steel plate 2 cm thick

[manal950]

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

 

[Chestermiller]

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.

 

[haruspex]

Pls explains your variables in the context of the problem.