$2-4.$ The simple steam turbine system shown in Fig. $2-36$ has turbine inlet Figure $2-36.$ A simple steam turbine system for Example $2-11.$

conditions of $1250$ psia and $850$ F and an exhaust pressure of $2$ psia $.$ The

turbine and pump efficiency are, respectively, $85$ and $72\%.$ What is the

cycle thermal efficiency? Also compare the result with the thermal efficiency

of a Carnot cycle operating between the same two temperatures.