Steam expands in a turbine steadily at a rate of 40,000 kg/h, entering at 8 MPa and500°C and leaving at 40 kPa as saturated vapor. If the power generated by the turbine is 8.2 MW,determine the rate of entropy generation for this process. Assume the surrounding medium is at25°C.8 MPа500°CSteamturbine8,2 MW40 kPasat. vapor

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determine the rate of entropy generation for this process. Assume the surrounding medium is at 25°C. 8 MPa

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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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 expands in a turbine steadily at a rate of 40,000 kg/h, entering at 8 MPa and
500°C and leaving at 40 kPa as saturated vapor. If the power generated by the turbine is 8.2 MW,
determine the rate of entropy generation for this process. Assume the surrounding medium is at
25°C.
8 MPа
500°C
Steam
turbine
8,2 MW
40 kPa
sat. vapor

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