A steam power plant operates according to the reheat Rankine cycle between the pressure limits of 15 MPa and 10 kPa. The mass flow rate of the steam circulating in the cycle is 12 kg/s. The steam enters both stages of the turbine at a temperature of 500 °C. The dryness fraction of the steam at the exit of the low-pressure turbine is 90%. Show the cycle on a T-s diagram, including the saturated liquid and saturated vapor lines. Also, determine: a) The pressure at which reheat occurs, b) The amount of heat supplied to the steam per unit time in the boiler, c) The thermal efficiency of the cycle.
A steam power plant operates according to the reheat Rankine cycle between the pressure limits of 15 MPa and 10 kPa. The mass flow rate of the steam circulating in the cycle is 12 kg/s. The steam enters both stages of the turbine at a temperature of 500 °C. The dryness fraction of the steam at the exit of the low-pressure turbine is 90%. Show the cycle on a T-s diagram, including the saturated liquid and saturated vapor lines. Also, determine: a) The pressure at which reheat occurs, b) The amount of heat supplied to the steam per unit time in the boiler, c) The thermal efficiency of the cycle.
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 operates according to the reheat Rankine cycle between the pressure limits of 15 MPa and 10 kPa. The mass flow rate of the steam circulating in the cycle is 12 kg/s. The steam enters both stages of the turbine at a temperature of 500 °C. The dryness fraction of the steam at the exit of the low-pressure turbine is 90%. Show the cycle on a T-s diagram, including the saturated liquid and saturated vapor lines. Also, determine: a) The pressure at which reheat occurs, b) The amount of heat supplied to the steam per unit time in the boiler, c) The thermal efficiency of the cycle.
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Step 1: GIVEN VALUES IN PROBLEM AND T-S DIAGRAM OF REHEAT RANKINE CYCLE
VIEWStep 2: FINDING VALUES FROM STEAM TABLE AND WORK DONE BY PUMP
VIEWStep 3: ENTHALPY AND ENTROPY FROM STEAM TABLES AT DIFFERENT POINTS
VIEWStep 4: HEAT SUPPLY AND THERMAL EFFICIENCY CALCULATION
VIEWStep 5: THERMAL EFFICIENCY CALCULATION
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