A steam power plant operates with a boiler that is heated from a heat source at...

A steam power plant operates with a boiler that is heated from a heat source at 457 °C and produces 450 ton/hr. of steam. The steam leaves the boiler at 425 °C and 4 MPa. The steam reaches a turbine at 375 °C and 3 MPa and leaves it at 50 kPa with 4% liquid water. This mixture is flown into a condenser that rejects the heat into a river at 17 °C. Water leaves the condenser at 50 kPa and 50 °C and pumped by a pump operating at 10 kJ/kg. The water leaves the pump at 4 MPa.

1. Draw the complete cycle with all numeric values of the problem depicted on the drawing. [10 points]

2. Calculate the Carnot efficiency of the cycle. [10 points]

3. Calculate the specific heat loss (kJ/kg) in the pipeline between the boiler and the turbine. Define input/output. [10 points]

4. Calculate the turbine work in MW. Define input/output. [10 points]

5. Calculate the specific heat transfer (kJ/kg) in the condenser. Define input/output. [10 points]

6. Determine the specific heat transfer (kJ/kg) in the boiler. Define input/output. [10 points]

7. Determine thermal efficiency of the cycle. [10 points]

8. Determine the isentropic efficiency of the turbine. [10 points]

9. Calculate the specific entropy (kJ/kg-K) of the cycle and explain whether this is a feasible process. [10 points]

10. Calculate the total specific entropy change (kJ/kg-K) of the system and explain whether this is a feasible process. [10 points]

Expert Solution

samet mamat answered 2 years ago

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