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Question

The moisture content of steam at the turbine exit of a steam power plant operating on the Rankine cycle can be decreased by:

A.

Decreasing boiler pressure

B.

Increasing boiler pressure

C.

Reheating steam

D.

Super cooling steam

Answer ( Option C)

Reheating steam

Solution

The moisture content of steam can be decreased byreheating steam at the exit of turbine.

Hence, the correct option is (C).

&Key Points:-

Reheating of steam in Rankine cycle     

1. Increases work output

2. May increases or decreases efficiency

3. Heat added increases

4. Dryness fraction increases

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