Thermal calculation of electric heaters
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Does anyone understand the thermal calculations for electric heaters? Is it equivalent to a heat exchanger design with a constant heat flux?
I thought about it for a few days to see if it was correct. It seems that a heater should work like a heat exchanger, only considering the fluid on the other side as having a constant heat flux density. In fact, the heat generated is also carried away by fluid convection. Thus, the convective heat transfer coefficient and the amount of heat removed can be calculated.