In a regenerative feed heating cycle, the optimum value of the fraction of steam extracted for feed heating________________?
Correct answer: B. increases with increase in Rankine cycle efficiency
- A. decreases with increase in Rankine cycle efficiency
- B. increases with increase in Rankine cycle efficiency
- C. is unaffected by increase in Rankine cycle efficiency
- D. none of the above
Explanation
As the basic Rankine cycle becomes more efficient, the optimum regenerative arrangement generally uses a larger fraction of extracted steam for feed heating. The extraction fraction is selected to balance feedwater heating against the turbine work lost by bleeding steam.
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