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Steam leaves a turbine at 250 kPa and 0.85 dryness fraction after isentropic expansion. The turbine inlet pressure is 3 MPa. A boiler feed-water pump extracts the moisture in the 250 kPa wet exhaust and returns it to the boiler, leaving only dry steam to enter a lower-pressure turbine. It expands isentropically in this turbine to 4 kPa, and a second feed-water pump returns the condensate to the boiler. Ignoring the feed-water pump terms, calculate the ideal-cycle efficiency.

Steam leaves a turbine at 250 kPa and 0.85 dryness fraction after isentropic expansion. The turbine inlet pressure is 3 MPa. A boiler feed-water pump extracts the moisture in the 250 kPa wet exhaust and returns it to the boiler, leaving only dry steam to enter a lower-pressure turbine. It expands isentropically in this turbine to 4 kPa, and a second feed-water pump returns the condensate to the boiler. Ignoring the feed-water pump terms, calculate the ideal-cycle efficiency.

Elements Of Electromagnetics
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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Steam leaves a turbine at 250 kPa and 0.85 dryness fraction after isentropic expansion. The turbine inlet pressure is 3 MPa. A boiler feed-water pump extracts the moisture in the 250 kPa wet exhaust and returns it to the boiler, leaving only dry steam to enter a lower-pressure turbine. It expands isentropically in this turbine to 4 kPa, and a second feed-water pump returns the condensate to the boiler. Ignoring the feed-water pump terms, calculate the ideal-cycle efficiency.
Transcribed Image Text:Steam leaves a turbine at 250 kPa and 0.85 dryness fraction after isentropic expansion. The turbine inlet pressure is 3 MPa. A boiler feed-water pump extracts the moisture in the 250 kPa wet exhaust and returns it to the boiler, leaving only dry steam to enter a lower-pressure turbine. It expands isentropically in this turbine to 4 kPa, and a second feed-water pump returns the condensate to the boiler. Ignoring the feed-water pump terms, calculate the ideal-cycle efficiency.
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