A steam power plant operating on regenerative cycle, as illustrated in Fig 8.5, includs just one feedwater heater. Steam enters the turbine at 650 psia and 900oF and exhaust at 1 psia. Steam for the feedwater heater is extracted from the turbine at 50 psia, and in condensing raises the temperature of the feedwater to within 11oF of its condensation temperature at 50 psia. If the turbine and pump efficiencies are both 0,78, what is the thermal efficiency of the cycle and what fraction of the steam entering the turbine is extracted for the feedwater heater
A steam power plant operating on regenerative cycle, as illustrated in Fig 8.5, includs just one feedwater heater. Steam enters the turbine at 650 psia and 900oF and exhaust at 1 psia. Steam for the feedwater heater is extracted from the turbine at 50 psia, and in condensing raises the temperature of the feedwater to within 11oF of its condensation temperature at 50 psia. If the turbine and pump efficiencies are both 0,78, what is the thermal efficiency of the cycle and what fraction of the steam entering the turbine is extracted for the feedwater heater
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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A steam power plant operating on regenerative cycle, as illustrated in Fig 8.5, includs just one feedwater heater. Steam enters the turbine at 650 psia and 900oF and exhaust at 1 psia. Steam for the feedwater heater is extracted from the turbine at 50 psia, and in condensing raises the temperature of the feedwater to within 11oF of its condensation temperature at 50 psia. If the turbine and pump efficiencies are both 0,78, what is the thermal efficiency of the cycle and what fraction of the steam entering the turbine is extracted for the feedwater heater?
Transcribed Image Text:P-8,600 kPa 1= 500°C
Boiler
Turbine
V
P-2,900 kPa
P=1,150 kPa
P= 375 kPa
P= 10 kPa
226°C
P=87.69 kPa
181°C
231.97
136°C
141.30
"C
791C
46°C
Condenser
186.05
96.00
"C
45°C
Feedwater heaters
Pump
Figure 8.5: Steam power plant with feedwater heating.
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