Rankine efficiency of a steam power plant____________?
Correct answer: B. improves in winter as compared to that in summer
- A. improves in summer as compared to that in winter
- B. improves in winter as compared to that in summer
- C. is unaffected by climatic conditions
- D. none of the above
Explanation
Cooler winter conditions lower the condenser cooling-water temperature and improve the condenser vacuum. The lower back pressure increases the turbine expansion range and hence Rankine efficiency.
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