Thermodynamics: An Engineering Approach
8th Edition
ISBN: 9780073398174
Author: Yunus A. Cengel Dr., Michael A. Boles
Publisher: McGraw-Hill Education
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Chapter 10.9, Problem 35P
A steam power plant operates on an ideal reheat Rankine cycle between the pressure limits of 15 MPa and 10 kPa. The mass flow rate of steam through the cycle is 12 kg/s. Steam enters both stages of the turbine at 500°C. If the moisture content of the steam at the exit of the low-pressure turbine is not to exceed 5 percent, determine (a) the pressure at which reheating takes place, (b) the total rate of heat input in the boiler, and (c) the thermal efficiency of the cycle. Also, show the cycle on a T-s diagram with respect to saturation lines.
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A steam power plant operates on the simple ideal Rankine cycle. The steam enters the
turbine at 4 MPa and 500°C and is condensed in the condenser at a temperature of 40°C. draw and label the schematic diagram and the pV and TS planes.
(a) Show the cycle on a T-s diagram. If the mass flow rate is 10 kg/s, determine
(b) the thermal efficiency of the cycle
(c) the net power output in kW.
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.
Note: This is a question from the thermodynamics course. Please provide a clear and quick solution.
Consider a steam power plant operating on the ideal reheat Rankine cycle. Steam enters the high-pressure turbine at 15 MPa and 600°C and is condensed in the condenser at a pressure of 10 kPa. If the moisture content of the steam at the exit of the low-pressure turbine is not to exceed 10.4 percent, determine (a) the pressure at which the steam should be reheated and (b) the thermal efficiency of the cycle. Assume the steam is reheated to the inlet temperature of the high-pressure turbine
Chapter 10 Solutions
Thermodynamics: An Engineering Approach
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