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    Thermodynamics Rankine cycle efficiency problem

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    An ideal reheat Rankine cycle operates between the pressure limits of 20 kPa and 8 MPa, with reheat occurring at 3 MPa. The temperature of steam at the inlets of both turbines is 500°C, and the enthalpy of steam is 3104 kJ/kg at the exit of the high-pressure turbine, and 2385 kJ/kg at the exit of the low-pressure turbine. Disregarding the pump work, the cycle efficiency is:

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    https://brainmass.com/physics/heat-thermodynamics/thermodynamics-rankine-cycle-efficiency-problem-34718

    Solution Preview

    Please see the attached file.

    Thermal efficiency of the reheated Rankine cycle is given by;

    (1)

    where;

    (2)

    Enthalpies at the exit of the turbines are given, h4=3104 ...

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    The expert examines thermodynamics Rankine cycle efficiency problems.

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