What is the boiler horsepower of a boiler generating 21,500 lbs of steam per hour at 155 psi? The factor of evaporation is 1.08.

BHP = (LB/HR*fe)/34.5

                BHP = (LB/HR*fe)/34.5

                BHP = 21500 * 1.08 / 34.5

                BHP = 673

Where,

                BHP    boiler horsepower

                Lb/Hr   pounds per hour

                Fe     factor of evaporation (can be assumed to be equal to 1)