An Ideal cogeneration steam plant is to generate power and 9400 kJ/s of process heat. Steam enters the turbine from the boller at 7 MPa and 500°C. One-fourth of the steam is extracted from the turbine at 600 kPa pressure for process heating. The remainder of the steam continues to expand and exhausts to the condenser at 10 kPa. The steam extracted for the process heater is condensed in the heater and mixed with the feedwater at 600 kPa. The mixture is pumped to the boller pressure of 7 MPa. Turbine

Elements Of Electromagnetics
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Author:Sadiku, Matthew N. O.
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An ideal cogeneration steam plant is designed to generate power and produce 9400 kJ/s of process heat. The system operates as follows:

1. Steam enters the turbine from the boiler at a pressure of 7 MPa and a temperature of 500°C.
2. A portion of the steam is extracted from the turbine at a pressure of 600 kPa to be used for process heating.
3. The remaining steam continues to expand and is exhausted into the condenser at a pressure of 10 kPa.
4. The steam extracted for process heating is condensed in the process heater and subsequently mixed with feedwater at 600 kPa.
5. The mixture is pumped to a pressure of 7 MPa for return to the boiler.

The diagram illustrates the following components and flow of processes:

- **Boiler (5):** Heats the water to steam at the specified pressure and temperature.
- **Turbine (6):** Converts steam energy to mechanical work, partially extracting steam for heating, and routes the rest to the condenser.
- **Condenser (8):** Cools and condenses the expanded steam from the turbine.
- **Process Heater:** Utilizes a portion of steam for heating purposes before condensing.
- **Pump I (1):** Raises the pressure of condensed water from the condenser.
- **Pump II (4):** Raises the pressure of the mixture from the process heater before it returns to the boiler.

**Determine the net power produced by the plant.**

The net power produced by the plant is ________ kW.
Transcribed Image Text:An ideal cogeneration steam plant is designed to generate power and produce 9400 kJ/s of process heat. The system operates as follows: 1. Steam enters the turbine from the boiler at a pressure of 7 MPa and a temperature of 500°C. 2. A portion of the steam is extracted from the turbine at a pressure of 600 kPa to be used for process heating. 3. The remaining steam continues to expand and is exhausted into the condenser at a pressure of 10 kPa. 4. The steam extracted for process heating is condensed in the process heater and subsequently mixed with feedwater at 600 kPa. 5. The mixture is pumped to a pressure of 7 MPa for return to the boiler. The diagram illustrates the following components and flow of processes: - **Boiler (5):** Heats the water to steam at the specified pressure and temperature. - **Turbine (6):** Converts steam energy to mechanical work, partially extracting steam for heating, and routes the rest to the condenser. - **Condenser (8):** Cools and condenses the expanded steam from the turbine. - **Process Heater:** Utilizes a portion of steam for heating purposes before condensing. - **Pump I (1):** Raises the pressure of condensed water from the condenser. - **Pump II (4):** Raises the pressure of the mixture from the process heater before it returns to the boiler. **Determine the net power produced by the plant.** The net power produced by the plant is ________ kW.
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