In a power station, saturated steam is generated at 252°C by transferring heat from the hot gases gener- ated in the combustion chamber. The gases are cooled from 1100°C to 550°C during transferring the heat for steam generation. Determine the increase in total entropy of the combined system of gas and steam and increase in unavailable energy on the basis of one kg of steam generated. Assume water enters the boiler at saturated condition and leaves as saturated steam. [Ans. 1.99 kJ/K ; 597 kJ/kg of steam formed]

In a power station, saturated steam is generated at 252°C by transferring heat from the hot gases gener- ated in the combustion chamber. The gases are cooled from 1100°C to 550°C during transferring the heat for steam generation. Determine the increase in total entropy of the combined system of gas and steam and increase in unavailable energy on the basis of one kg of steam generated. Assume water enters the boiler at saturated condition and leaves as saturated steam. [Ans. 1.99 kJ/K ; 597 kJ/kg of steam formed]

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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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

2. In a power station, saturated steam is generated at 252°C by transferring heat from the hot gases gener-
ated in the combustion chamber. The gases are cooled from 1100°C to 550°C during transferring the heat
for steam generation. Determine the increase in total entropy of the combined system of gas and steam and
increase in unavailable energy on the basis of one kg of steam generated. Assume water enters the boiler
at saturated condition and leaves as saturated steam.
[Ans. 1.99 kJ/K ; 597 kJ/kg of steam formed]

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