A reheat cycle with two stages of reheating is executed with steam expanding initially from 200...

 

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A reheat cycle with two stages of reheating is executed with steam expanding initially from 200 bar (20 Mpaa) and 540 deg C. The 2 reheater pressures are 40 bar (4 Mpaa) and 10 bar (1 Mpaa) and the steam leaves each reheater at 540 deg C. Steam is bled in between two reheating sessions at a pressure equal to 20 and 15 bars into 2 open feedwater heaters. Condensation occurs at 60 deg C. All expansion and compression efficiencies are 90 %. There is a total of 10.25 kg/sec of steam (total mass flow rate m) circulated in the cycle. Answer the following: fill up the blanks in the items below: 1. Equipment layout and TS diagram for the cycle. 2. Ideal turbine work (KW) Ans:_ 3. Actual mass of steam bled into the open heater m1'= heater nearest to the SGU/boiler and m2' = heater nearest to the condenser. 4. Actual engine efficiency (%) Answer: 5. Actual Rankine cycle efficiency % using Wt' and Wp' values Answer: 6. Actual Rankine cycle efficiency % using Qa' and Qr' values Answer: kg/sec for the kg/sec for the 7. If the generator efficiency = 95%, brake engine efficiency = 90% what is the plant capacity in MW? Answer: 8. If Cp water = 4.187 KJ/kg-K; cooling water enters the condenser at 12 deg C and leaves at 21 deg C, find amount of cooling water needed by the condenser in kg/sec. (ACTUAL) Answer: 9. Combined Heat Rate in KJ/KW-hr Answer: 10. Speed of the turbine shaft in rev per minute if Torque measured by the dynamometer= 90 KN-m at the turbine shaft. Answer: A reheat cycle with two stages of reheating is executed with steam expanding initially from 200 bar (20 Mpaa) and 540 deg C. The 2 reheater pressures are 40 bar (4 Mpaa) and 10 bar (1 Mpaa) and the steam leaves each reheater at 540 deg C. Steam is bled in between two reheating sessions at a pressure equal to 20 and 15 bars into 2 open feedwater heaters. Condensation occurs at 60 deg C. All expansion and compression efficiencies are 90 %. There is a total of 10.25 kg/sec of steam (total mass flow rate m) circulated in the cycle. Answer the following: fill up the blanks in the items below: 1. Equipment layout and TS diagram for the cycle. 2. Ideal turbine work (KW) Ans:_ 3. Actual mass of steam bled into the open heater m1'= heater nearest to the SGU/boiler and m2' = heater nearest to the condenser. 4. Actual engine efficiency (%) Answer: 5. Actual Rankine cycle efficiency % using Wt' and Wp' values Answer: 6. Actual Rankine cycle efficiency % using Qa' and Qr' values Answer: kg/sec for the kg/sec for the 7. If the generator efficiency = 95%, brake engine efficiency = 90% what is the plant capacity in MW? Answer: 8. If Cp water = 4.187 KJ/kg-K; cooling water enters the condenser at 12 deg C and leaves at 21 deg C, find amount of cooling water needed by the condenser in kg/sec. (ACTUAL) Answer: 9. Combined Heat Rate in KJ/KW-hr Answer: 10. Speed of the turbine shaft in rev per minute if Torque measured by the dynamometer= 90 KN-m at the turbine shaft. Answer:

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To solve this problem we need to use the given information and apply the principles of thermodynamics and steam power plant operations 1 Equipment lay... View the full answer