Thermodynamics: An Engineering Approach
9th Edition
ISBN: 9781260048766
Author: CENGEL
Publisher: MCG
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Chapter 10.9, Problem 41P
Consider a steam power plant that operates on a reheat Rankine cycle and has a net power output of 80 MW. Steam enters the high-pressure turbine at 10 MPa and 500°C and the low-pressure turbine at 1 MPa and 500°C. Steam leaves the condenser as a saturated liquid at a pressure of 10 kPa. The isentropic efficiency of the turbine is 80 percent, and that of the pump is 95 percent. Show the cycle on a T-s diagram with respect to saturation lines, and determine (a) the quality (or temperature, if superheated) of the steam at the turbine exit, (b) the thermal efficiency of the cycle, and (c) the mass flow rate of the steam.
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Consider a 150-MW steam power plant that operates on a simple Rankine cycle. Steam enters the turbine at 7 MPa and 500°C and is cooled in the condenser at 10 kPa. Calculate the mass flow rate of steam produced by the boiler. Assume an isentropic efficiency of 87% for both the turbine and the pump.
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Consider a steam power plant that operates on a
reheat Rankine cycle and has a net power output of
80 MW. Steam enters the high-pressure turbine at 10
MPa and 500°C and the low-pressure turbine at 1.8
MPa and 500°C. Steam leaves the condenser as a
saturated liquid at a pressure of 10 kPa. Assume both
turbine and compressor are isentropic.
NOTE: This is a multi-part question. Once an answer
is submitted, you will be unable to return to this part.
Determine the quality (or temperature, if superheated) of the steam
at the turbine exit.
The quality of the steam at the turbine exit is
Chapter 10 Solutions
Thermodynamics: An Engineering Approach
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