- #1
miniradman
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Homework Statement
Determine the thermal conductivity of a metal (assume linear heat distribution at steady-state, and well insulated), given,
Thot = 96.8
Tcold = 29.5
There is also:
13.7 W being pumped in at one end.
Water convecting heat away on the other end.
Homework Equations
Fourier's Law:
[itex]q = -kA\frac{∂T}{∂x}[/itex]
The Attempt at a Solution
Hello, I was wondering about whether or not the water convecting heat will change the value of q in any way? I thought to use fourier's law, all you needed was the amount of energy going into one end and the temperature difference. I assumed that because the system is at steady-state (and is well insulated, the amount of heat going in will be the same as what is being convected out by the water. Hence q = 13.7W
However I'm getting a value of 13ish for thermal conductivity, and this material is suppose to be Aluminium so that's way off.
I got the equation:
[itex]k=-\frac{qΔx}{A((Tcold)-(Thot))} [/itex]
which looks correct to me, however its been a long day...
ps.
I used the following Python code to computer the sum.
Code:
dx = 0.03
A = 4.504 * (10**(-4))
q = 13.7
T2 = 100.1
T3 = 97.9
T6 = 28.5
T7 = 26.5
def thermalConductivity():
k = -((q*dx)/(A*(((T6+((T6-T7)/2))-(T3-((T2-T3)/2))))))
return k
print(thermalConductivity())