1. A steam power plant operates on a reheat regenerative Rankine cycle with a closed feedwater heater. Steam enters the turbine at 9 Mpaa and 500 deg C at a rate of 15 kg/sec and is condensed in the condenser at a pressure of 20 kPaa. Steam is reheated at 3 MPaa, 500 deg C. Some steam is extracted from the turbine at 1 Mpaa and is completely condensed in the closed feedwater heater and pumped to 9 Mpaa before it mixes with the feedwater heater at the same pressure in a mixing chamber. The Terminal Difference for the CFWH, (i.e., the difference between the temperatures of the fluids leaving the heater) is 3 deg C. Assuming an isentropic efficiency of 89 percent for both the turbines and the pumps, determine: 1. Equipment Layout and TS diagram for the cycle 2. Ideal extracted steam for feedwater heating in kg/kg 3. Actual extracted steam for feedwater heating in kg/kg
1. A steam power plant operates on a reheat regenerative Rankine cycle with a closed feedwater heater. Steam enters the turbine at 9 Mpaa and 500 deg C at a rate of 15 kg/sec and is condensed in the condenser at a pressure of 20 kPaa. Steam is reheated at 3 MPaa, 500 deg C. Some steam is extracted from the turbine at 1 Mpaa and is completely condensed in the closed feedwater heater and pumped to 9 Mpaa before it mixes with the feedwater heater at the same pressure in a mixing chamber. The Terminal Difference for the CFWH, (i.e., the difference between the temperatures of the fluids leaving the heater) is 3 deg C. Assuming an isentropic efficiency of 89 percent for both the turbines and the pumps, determine:
1. Equipment Layout and TS diagram for the cycle
2. Ideal extracted steam for feedwater heating in kg/kg
3. Actual extracted steam for feedwater heating in kg/kg
4. Ideal Turbine work (KW)
5. Ideal engine efficiency (%)
6. Turbine work, actual (KW)
7. Actual Cycle efficiency using Pump and Turbine works (%)
8. Brake Work in KW if friction loss at the turbine is 4 % of actual turbine work.
9. The torque measured at the shaft in KN-m if the generator is running at 3600 rpm for a brake work in item 8.
10. Combined Work if ng = 93% and considering Wb in Item 8 (KW).
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