Liquid water enters a boiler at 5 psig and 65ºF through a 4 in pipe at an area average velocity of 5 ft/s. At steady state steam is produced at 600ºF and 400 psig. What is the rate of heat addition...

Liquid water enters a boiler at 5 psig and 65ºF through a 4 in pipe at an area average velocity of 5 ft/s. At steady state steam is produced at 600ºF and 400 psig. What is the rate of heat addition required per 1000 lbm of water? Answer (BTU/s)