as shown in the graph i have heated Cu bar from 90°C to 130°C with different electric current 90A and 120A. once Cu bar reached 130°C i have turned off the electric current and let it cool by natural cooling. now, the initial condition in both case is same(130°C) but why it shows difference(Time) in both case?
i have placed sensor on the Cu bar to measure the temperature of the Cu bar.
Where do you measure the temperature of the copper bar? It is possible that the final temperature of the bar is not homogeneous, and ion this case the initial conditions may not be the same .
i have measured at the middle of the bar. for both case the measuring point is same. it may possible that the final temperature of the bar is not homogeneous but the condition at the measuring point is same.
time of heating the copper bar is depends on the applied electric current but Is this time difference during cooling depends also on the input electric current? if yes, how?
Hello, what kind of heating method are you using (AC, DC)? What is the size of your cooper bar? As per your graph, it looks like that the energy transfer on the bar itself is larger for the 90A case compared to the 120A (if AC could the skin effect play a role )
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