Heat Transfer Coefficient Calculator. Assuming heat transfer coefficients of 1000 wm 2 c 176 btu hr ft 2 f for the water being heated 3000 wm 2 c 528 btu hr ft 2 f for hot water and 10000 wm 2 c 1761 btu hr ft 2 f for steam lets calculate the u values for both heating processes. However when the body is surrounded by the gaseous or liquid media additional heat transfer mechanisms are involved and heat transfer analysis requires the fluid dynamic analysis which is highly complicated.
Ud the design overall heat transfer coefficient based on the outside area of the tube taking into account fouling factors for both fluids wm2ok ho outside fluid film coefficient wm2ok hi inside fluid film coefficient wm2ok ro outside dirt coefficient fouling factor m2kw ri inside dirt coefficient fouling factor m2kw. Heat transfer coefficient based on nusselts number correlations. Basic heat transfer can also be calculated using specific heat mass and temperature differentials.
The equation for the heat transfer rate q is written as follows.
Ts solid surface temperature k surrounding fluid area temperature it is used in calculating the heat transfer typically by convection or phase transition between a fluid and a solid. Heat exchangers are similar to electrical circuits in a few senses. Heat transfer coefficient conversion calculator result. Dividing it by the temperature difference gives the heat transfer coefficient eq.