Heat transfer in steam heater. water at an average of 70°f is flowing in a 2-in. steel pipe, schedule 40. steam at 220°f is condensing on the outside of the pipe. the con- vective coefficient for the water inside the pipe is h = 500 btu/h ft. 'f and the con- densing steam cocfficient on the outside is h = 1500 (a) calculate the heat loss per unit length of 1 ft of pipe using resistances. (b) repeat, using the overall u based on the inside area ar (c) repeat, using u ans.(a)q= 26 710 btu/h (7.828 kw). (b) u, = 329.1 btu/h-ft. com (1869 w/m².k), (c) u.= 286.4 btu/h. eta . °f (1626 w/m²k)