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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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]
Transcribed Image Text: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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