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Q4: Consider a steam power plant that operates on an ideal regenerative Rankine cycle with one open feedwater heater, one closed feedwater heater, and one reheater. Steam enters the turbine at 15 MPa and 600°C and is condensed in the condenser at a pressure of 10 kPa. Some steam is extracted from the turbine at 4 MPa for the closed feedwater heater, and the remaining steam is reheated at the same pressure to 600°C. The extracted steam is completely condensed in the heater and is pumped to 15 MPa before it mixes with the feedwater at the feedwater heater is extracted from the same pressure. Steam for the open low-pressure turbine at a pressure of 0.5 MPa. Determine the fractions of steam extracted from the turbine as well as the thermal efficiency of the cycle. 1 kg 15 MPa 600°C 9 11 Boiler Mixing chamber www Reheater Closed FWH tw Pump III High-P Low-P turbine turbine 10 P₁= P₁=4 MPa 600°C 2 12 1-y Open FWH y 4 MPa Pump II te 0.5 MPa Pump I 1-y-z 10 kPa Condenser 6 15 MPa 4 MPa 0.5 MPa 10 kPa 10 z 1-y 12 1-y-z 13

Q4: Consider a steam power plant that operates on an ideal regenerative Rankine cycle with one open feedwater heater, one closed feedwater heater, and one reheater. Steam enters the turbine at 15 MPa and 600°C and is condensed in the condenser at a pressure of 10 kPa. Some steam is extracted from the turbine at 4 MPa for the closed feedwater heater, and the remaining steam is reheated at the same pressure to 600°C. The extracted steam is completely condensed in the heater and is pumped to 15 MPa before it mixes with the feedwater at the feedwater heater is extracted from the same pressure. Steam for the open low-pressure turbine at a pressure of 0.5 MPa. Determine the fractions of steam extracted from the turbine as well as the thermal efficiency of the cycle. 1 kg 15 MPa 600°C 9 11 Boiler Mixing chamber www Reheater Closed FWH tw Pump III High-P Low-P turbine turbine 10 P₁= P₁=4 MPa 600°C 2 12 1-y Open FWH y 4 MPa Pump II te 0.5 MPa Pump I 1-y-z 10 kPa Condenser 6 15 MPa 4 MPa 0.5 MPa 10 kPa 10 z 1-y 12 1-y-z 13

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Q4: Consider a steam power plant that operates on an ideal reheat- regenerative Rankine cycle with one open feedwater heater, one closed feedwater heater, and one reheater. Steam enters the turbine at 15 MPa and 600°C and is condensed in the condenser at a pressure of 10 kPa. Some steam is extracted from the turbine at 4 MPa for the closed feedwater heater, and the remaining steam is reheated at the same pressure to 600°C. The extracted steam is completely condensed in the heater and is pumped to 15 MPa before it mixes with the feedwater at the same pressure. Steam for the open feedwater heater is extracted from the low-pressure turbine at a pressure of 0.5 MPa. Determine the fractions of steam extracted from the turbine as well as the thermal efficiency of the cycle. 1 kg 15 MPa 600°C Boiler 15 MPa 4 MPa 0.5 MPa 10 kPa Mixing chamber (0) Reheater Closed FWH www Pump III 4 MPa High-P turbine 10 P₁0 P₁1=4 MPa 600°C 2 12 1-y (11) 0.5 MPa Open FWH Low-P turbine Pump II Pump I 1-y-z 13 10 kPa Condenser 6 10 2 1-y 12 1-y-z 13
Transcribed Image Text:Q4: Consider a steam power plant that operates on an ideal reheat- regenerative Rankine cycle with one open feedwater heater, one closed feedwater heater, and one reheater. Steam enters the turbine at 15 MPa and 600°C and is condensed in the condenser at a pressure of 10 kPa. Some steam is extracted from the turbine at 4 MPa for the closed feedwater heater, and the remaining steam is reheated at the same pressure to 600°C. The extracted steam is completely condensed in the heater and is pumped to 15 MPa before it mixes with the feedwater at the same pressure. Steam for the open feedwater heater is extracted from the low-pressure turbine at a pressure of 0.5 MPa. Determine the fractions of steam extracted from the turbine as well as the thermal efficiency of the cycle. 1 kg 15 MPa 600°C Boiler 15 MPa 4 MPa 0.5 MPa 10 kPa Mixing chamber (0) Reheater Closed FWH www Pump III 4 MPa High-P turbine 10 P₁0 P₁1=4 MPa 600°C 2 12 1-y (11) 0.5 MPa Open FWH Low-P turbine Pump II Pump I 1-y-z 13 10 kPa Condenser 6 10 2 1-y 12 1-y-z 13
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