Thank you Latexman.
It's nice to hear some more deep knowledge to the phenomena "inside" the Joule-Thompson effect.
If we look at the first example when comparing the power equation vs the ideal gas law.
In my example I get a temperature increase of 0.83 degree Celsius, but the ideal gas law...
It all started with question around heat dissipation of shaft power, that I think got it sorted out thanks to this forum.
But another question came up to surface when a somebody starts to talk about the Joule-Thompson effect.
So if we consider following (this is the actual case):
Ducting with...