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7 November, 06:58

Sketch and label a simple reheat cycle along with the appropriate T-s diagram?

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  1. 7 November, 08:32
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    A reheat cycle is used to increase the overall efficiency of the power plant.

    Explanation:

    The Reheat cycle is used - -

    1. to increase the efficiency of the turbine

    2. to maintain the quality of the steam

    3. to provide higher pressure ratio

    The reheat cycle is used to to increase the net work output of the power plant. In reheat cycle, two turbines, one low pressure turbine and one high pressure turbine is used to increase the efficiency. The main purpose of the reheat cycle is to maintain the quality of the steam to 0.85 at the exit of the turbine.

    The figure given below shows a reheat rankine cycle.

    In the cycle,

    Process 1-2 is high pressure turbine

    Process 2-3 is the reheater

    Process 3-4 is the low pressure turbine

    Process 4-5 is condenser

    Process 5-6 is pump

    Process 6-1 is boiler

    A reheat rankine cycle is 30 - 40% efficient than a simple rankine cycle.
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