**Educational Content: Reheat-Regenerative Rankine Cycle****Problem 10-60:**A steam power plant operates on an ideal reheat-regenerative Rankine cycle and has a net power output of 80 MW. Steam enters the high-pressure turbine at 10 MPa and 550°C and leaves at 0.8 MPa. Some steam is extracted at this pressure to heat the feedwater in an open feedwater heater. The rest of the steam is reheated to 500°C and is expanded in the low-pressure turbine to the condenser pressure of 10 kPa. **Task:**- Display the cycle on a T-s diagram relative to saturation lines.- Determine the following: - (a) The mass flow rate of steam through the boiler. - (b) The thermal efficiency of the cycle.**Answers:**- (a) 54.5 kg/s- (b) 44.4 percent**Explanation:**The T-s diagram involves plotting temperature (T) against entropy (s), indicating the various stages of the Rankine cycle, including reheating and regenerative processes. The saturation lines on the diagram help visualize the phases of steam during the cycle.

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10–60 A steam power plant operates on an ideal reheat-regenerative Rankine cycle and has a net power output of S0 MW. Steam enters the high-pressure turbine at 10 MPa and 550°C and leaves at 0.S MPa. Some steam is extracted at this pressure to heat the feedwater in an open feedwater heater. The rest of the steam is reheated to 500°C and is expanded in the low-pressure turbine to the condenser pressure of 10 kPa. Show the cycle on a T-s diagram with respect to saturation lines, and determine (a) the mass flow rate of steam through the boiler and (b) the thermal efficiency of the cycle. Answers: (a) 54.5 kg/s. (b) 44.4 percent

10–60 A steam power plant operates on an ideal reheat-regenerative Rankine cycle and has a net power output of S0 MW. Steam enters the high-pressure turbine at 10 MPa and 550°C and leaves at 0.S MPa. Some steam is extracted at this pressure to heat the feedwater in an open feedwater heater. The rest of the steam is reheated to 500°C and is expanded in the low-pressure turbine to the condenser pressure of 10 kPa. Show the cycle on a T-s diagram with respect to saturation lines, and determine (a) the mass flow rate of steam through the boiler and (b) the thermal efficiency of the cycle. Answers: (a) 54.5 kg/s. (b) 44.4 percent

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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Question

**Educational Content: Reheat-Regenerative Rankine Cycle**

**Problem 10-60:**
A steam power plant operates on an ideal reheat-regenerative Rankine cycle and has a net power output of 80 MW. Steam enters the high-pressure turbine at 10 MPa and 550°C and leaves at 0.8 MPa. Some steam is extracted at this pressure to heat the feedwater in an open feedwater heater. The rest of the steam is reheated to 500°C and is expanded in the low-pressure turbine to the condenser pressure of 10 kPa.

**Task:**
- Display the cycle on a T-s diagram relative to saturation lines.
- Determine the following:
- (a) The mass flow rate of steam through the boiler.
- (b) The thermal efficiency of the cycle.

**Answers:**
- (a) 54.5 kg/s
- (b) 44.4 percent

**Explanation:**
The T-s diagram involves plotting temperature (T) against entropy (s), indicating the various stages of the Rankine cycle, including reheating and regenerative processes. The saturation lines on the diagram help visualize the phases of steam during the cycle.

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