A power plant operates on a regenerative vapor power cycle with one open feedwater heater. Steam enters the first turbine stage at 12 MPa, 560°C and expands to 1 MPa, where some of the steam is extracted and diverted to the open feedwater heater operating at 1 MPa. The remaining steam expands through
A power plant operates on a regenerative vapor power cycle with one open feedwater heater. Steam enters the first turbine stage at 12 MPa, 560°C and expands to 1 MPa, where some of the steam is extracted and diverted to the open feedwater heater operating at 1 MPa. The remaining steam expands through
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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Problem 8.030 SI
A power plant operates on a regenerative vapor power cycle with one open feedwater heater. Steam enters the first turbine stage at 12 MPa, 560°C and expands to 1 MPa, where some of the steam is extracted and diverted to the open feedwater heater operating at 1 MPa. The remaining steam expands through the second turbine stage to the condenser pressure of 50 kPa. Saturated liquid exits the open feedwater heater at 1 MPa. The net power output for the cycle is 330 MW. Assume that both turbine stages and both pumps have an isentropic efficiency of 75%.
Determine:
(a) the percent cycle thermal efficiency. (Ans is 30.5%)
(b) the mass flow rate into the first turbine stage, in kg/s. (Ans is 306.9 kg/s)
(c) the rate of entropy production in the open feedwater heater, in kW/K.
Determine:
(a) the percent cycle thermal efficiency. (Ans is 30.5%)
(b) the mass flow rate into the first turbine stage, in kg/s. (Ans is 306.9 kg/s)
(c) the rate of entropy production in the open feedwater heater, in kW/K.
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