Steam enters an adiabatic turbine at 5 MPa and 500°C with a 50 m/s velocity and exits from the turbine at 100 kPa and 75 m/s velocity. The power output of the turbine is 5 MW and the isentropic efficiency is 80%. Determine, a) The mass flow rate of the steam passed through the turbine. b) The temperature at the turbine exit. c) The rate of entropy generation during this process.

Steam enters an adiabatic turbine at 5 MPa and 500°C with a 50 m/s velocity and exits from the turbine at 100 kPa and 75 m/s velocity. The power output of the turbine is 5 MW and the isentropic efficiency is 80%. Determine, a) The mass flow rate of the steam passed through the turbine. b) The temperature at the turbine exit. c) The rate of entropy generation during this process.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

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Concept explainers

Entropy

In physics, entropy means the amount of disorder or the degree of randomness associated with a thermodynamic system. The system is not self-organized when the entropy of the system is high. For instance, when a system is at an elevated temperature, its molecules are in random motion, vibrating and colliding with each other. During this scenario, the probability of finding a molecule at a particular place twice, is low. Under this circumstance, the system can be said to be in a high entropy.

Question

Steam enters an adiabatic turbine at 5 MPa and 500°C with a 50 m/s velocity and
exits from the turbine at 100 kPa and 75 m/s velocity. The power output of the turbine
is 5 MW and the isentropic efficiency is 80%. Determine,
a) The mass flow rate of the steam passed through the turbine.
b) The temperature at the turbine exit.
c) The rate of entropy generation during this process.

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Step 3: Calculating the Input Work

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Step 4: Properties of steam at inlet and outlet

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Step 5: (A) The mass flow rate of the steam passed through the turbine

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Step 6: (B) The Temperature at the Turbine Exit

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