Disadvantages of increasing the boiler pressure in the Rankine cycle?
Answer:
The moisture content at the exit of the turbine increases which can decrease the efficiency of the turbine and can erode the turbine blades
Explanation:
The dryness fraction at the exit of the turbine is X4 and in case of the Rankine cycle with increased boiler pressure, it is X4'. Therefore from the figure it is clear that the X4'<X4.
Generally speaking, the moisture content at the exit of the turbine should be as low as possible.
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