Replied to the thread Power / temp curve, what is best model for fitting?.PostOne possible error source is the pressure inside the tube. If pressure changes, thermal resistance changes and the formula does not give correct answer. But if nothing moves and pressure is the same, just measuring one point should be ok?
Posted the thread Power / temp curve, what is best model for fitting?.ThreadIn parkhomov translated paper, there is curve power vs. temperature, and it has been fitted to polynomial with terms for temp difference and also for absolute temp for T^4. Compared to Stefan-Bolzmann law, there is rather big difference in the…