Q4: Consider a steam power plant that operates on an idea regenerative Rankine cycle with one open feedwater heater, one clos feedwater heater, and one reheater. Steam enters the turbine at 15 M and 600°C and is condensed in the condenser at a pressure of 10 kl Some steam is extracted from the turbine at 4 MPa for the clos feedwater heater, and the remaining steam is reheated at the sa

Elements Of Electromagnetics
7th Edition
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Author:Sadiku, Matthew N. O.
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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
the condenser at a pressure of 10 kPa.
and 600°C and is condensed
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
сycle.
I kg
15 MPa
TA
600°C
11
High-P
turbine
Low-P
turbine
Boiler
Reheater
10
15 MPa
Po= P =4 MPa 600°C2
4 MPa
10
1-y -z
12
1-y
6.
1-y
4 MPa
0.5 MPa
10 kPa
0.5 MPa
12
Оpen
FWH
Closed
1-y-z
FWH
10 kPa
Mixing
chamber
13
Condenser
Pump III
Pump II
Pump I
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 the condenser at a pressure of 10 kPa. and 600°C and is condensed 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 сycle. I kg 15 MPa TA 600°C 11 High-P turbine Low-P turbine Boiler Reheater 10 15 MPa Po= P =4 MPa 600°C2 4 MPa 10 1-y -z 12 1-y 6. 1-y 4 MPa 0.5 MPa 10 kPa 0.5 MPa 12 Оpen FWH Closed 1-y-z FWH 10 kPa Mixing chamber 13 Condenser Pump III Pump II Pump I
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