Question: Redo Problem 5.7 using Aspen Plus. Problem 5.7 A Rankine steam cycle has been proposed to generate work from burning fuel. The temperature of the

Redo Problem 5.7 using Aspen Plus.

Problem 5.7

A Rankine steam cycle has been proposed to generate work from burning fuel. The temperature of the burning fuel is 1100^◦C, and cooling water is available at 15^◦C. The steam leaving the boiler is at 20 bar and 700^◦C, and the condenser produces a saturated liquid at 0.2 bar. The steam lines are well insulated, the turbine and pump operate reversibly and adiabatically, and some of the mechanical work generated by the turbine is used to drive the pump

a. What is the net work obtained in the cycle per kilogram of steam generated in the boiler?

b. How much heat is discarded in the condenser per kilogram of steam generated in the boiler?

c. What fraction of the work generated by the turbine is used to operate the pump?

d. How much heat is absorbed in the boiler per kilogram of steam generated?

e. Calculate the engine efficiency and compare it with the efficiency of a Carnot cycle receiving heat at 1100^◦C and discharging heat at 15^◦C.

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