A simple steam power plant with mass flow rate of 90 kg/s is shown in Figure...

  
 

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A simple steam power plant with mass flow rate of 90 kg/s is shown in Figure 2. Water enters the boiler at a pressure of 120 bar and temperature of 320 °C, and at constant pressure the temperature of water increases to 500 °C. Then, superheated vapor enters the turbine to produce power. The water leaving the turbine has a temperature of 45 °C and quality of 0.95. Neglect the heat transfer from the boiler and turbine to the environment and assume no kinetic and potential energy change. a. Find heat transfer during process 1-2. b. How much work was produced during process 2-3. c. If the work consumption of the auxiliary equipment of the plant (e.g. pumps - not shown in the picture) is equal to 2500 kW, what is the thermal efficiency of the power plant? (Hint: for calculating thermal efficiency, you need to calculate the net power.) d. What is the isentropic efficiency of the turbine? e. Sketch the two processes on a T-S diagram. Boiler 1 Figure 2 2 Turbine 3 A simple steam power plant with mass flow rate of 90 kg/s is shown in Figure 2. Water enters the boiler at a pressure of 120 bar and temperature of 320 °C, and at constant pressure the temperature of water increases to 500 °C. Then, superheated vapor enters the turbine to produce power. The water leaving the turbine has a temperature of 45 °C and quality of 0.95. Neglect the heat transfer from the boiler and turbine to the environment and assume no kinetic and potential energy change. a. Find heat transfer during process 1-2. b. How much work was produced during process 2-3. c. If the work consumption of the auxiliary equipment of the plant (e.g. pumps - not shown in the picture) is equal to 2500 kW, what is the thermal efficiency of the power plant? (Hint: for calculating thermal efficiency, you need to calculate the net power.) d. What is the isentropic efficiency of the turbine? e. Sketch the two processes on a T-S diagram. Boiler 1 Figure 2 2 Turbine 3

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The detailed answer for the above question is provided below a Heat transfer during process 12 This process involves heating water at constant pressur... View the full answer