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Originally Posted by Les
Cannot give a definitive answer.
The theory is that the optimum Cu thickness is dependent on Peltier area and Film Coefficient(h) - Waterloo .
Bill Adams had the first crack at this 3yrs ago - Thickness .
Since Bill's effort there has been no advance in identifying the correct h.
Here I have tentatively suggested that h can be equated to the heat-sinks Thermal Conductance .
Without a value for h the optimum theoretical thickness cannot be calculated.
The only experimental work I have done - here - did not add to my understanding |
I checked your link to Waterloo calculator. In restricted time frame I couldn't find equations governing each of the cases exibited.
My hint is to start from comparing spherical spread results/input data needed and cubical ones. From what I can tell your mysterious h is only dependant on geometry of our cold plate.
Imagine the cold plate being infinite in X & Y axis but Z axis(thickness) is adjustable. What would be your Z dimension to achieve optimum performance?
Try to draw 3-D temp gradients representation to achieve the ideal 3-D geometry of cold plate.
Just my 2 pennies
