An uninsulated, irreversible steam engine whose surface temperature is 200.°F produces 50.0 hp with a steam mass flow rate of 15.0 lbm/min.
The inlet steam is at 400.°F, 100. psia; and it exits at 14.7 psia, 90.0% quality. Determine
(a) the rate of heat loss from the engine and
(b) its entropy production rate.