Review Question 2. Consider a reheat-regenerative vapor power cycle with two feedwater heaters, a closed feedwater heater and an open feedwater heater. Steam enters the first turbine at 8.0 MPa, 480C and expands to 1.0 MPa. The steam is reheated to 440C before entering the second turbine, where it expands to the condenser pressure of 0.008 MPa. Steam is extracted from the first turbine at 2 MPa and fed to the closed feedwater heater. Feedwater leaves the closed heater at 210 C and 8.0 MPa, and condensate exits as saturated liquid at 2 MPa. The condensate is trapped into the open feedwater heater. Steam extracted from the second turbine at 0.5 MPa is also fed into the open feedwater heater, which operates at 0.5 MPa. The stream exiting the open feedwater heater is saturated liquid at 0.5 MPa. The net power output of the cycle is 150 MW. There is no stray heat transfer from any component to its surroundings. If the working fluid experiences no irreversibility as it passes through the turbines, pumps, steam generator, reheater, and condenser, determine (a) the thermal efficiency, (b) the mass flow rate of the steam entering the first turbine, in kg/s. (c) Heat rejected in the condenser, kW
Review Question 2. Consider a reheat-regenerative vapor power cycle with two feedwater heaters, a closed feedwater heater and an open feedwater heater. Steam enters the first turbine at 8.0 MPa, 480C and expands to 1.0 MPa. The steam is reheated to 440C before entering the second turbine, where it expands to the condenser pressure of 0.008 MPa. Steam is extracted from the first turbine at 2 MPa and fed to the closed feedwater heater. Feedwater leaves the closed heater at 210 C and 8.0 MPa, and condensate exits as saturated liquid at 2 MPa. The condensate is trapped into the open feedwater heater. Steam extracted from the second turbine at 0.5 MPa is also fed into the open feedwater heater, which operates at 0.5 MPa. The stream exiting the open feedwater heater is saturated liquid at 0.5 MPa. The net power output of the cycle is 150 MW. There is no stray heat transfer from any component to its surroundings. If the working fluid experiences no irreversibility as it passes through the turbines, pumps, steam generator, reheater, and condenser, determine (a) the thermal efficiency, (b) the mass flow rate of the steam entering the first turbine, in kg/s. (c) Heat rejected in the condenser, kW
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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Transcribed Image Text:It helps you to solve problems under the concept of Reheat, Regenerative and Reheat-Regenerative
Cycle in Rankine cycles
Review Question 2. Consider a reheat-regenerative vapor power cycle with two feedwater
heaters, a closed feedwater heater and an open feedwater heater. Steam enters the first turbine at
8.0 MPa, 480C and expands to 1.0MPA. The steam is reheated to 440C before entering the second
turbine, where it expands to the condenser pressure of 0.008 MPa. Steam is extracted from the first
turbine at 2 MPa and fed to the closed feedwater heater. Feedwater leaves the closed heater at 210
C and 8.0 MPa, and condensate exits as saturated liquid at 2 MPa. The condensate is trapped into
the open feedwater heater. Steam extracted from the second turbine at 0.5 MPa is also fed into the
open feedwater heater, which operates at 0.5 MPa. The stream exiting the open feedwater heater
is saturated liquid at 0.5 MPa. The net power output of the cycle is 150 MW. There is no stray
heat transfer from any component to its surroundings. If the working fluid experiences no
irreversibility as it passes through the turbines, pumps, steam generator, reheater, and condenser,
determine
(a) the thermal efficiency,
(b) the mass flow rate of the steam entering the first turbine, in kg/s.
(c) Heat rejected in the condenser, kW
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