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Railways NTPC (Technical Ability) Power Plant Engineering Question Bank Power Plant Engineering

  • question_answer
    What is the efficiency of an ideal regenerative Rankine cycle power plant using saturated steam at \[327{}^\circ C\] and pressure 135 bar at the inlet to the turbine, and condensing temperature of \[27{}^\circ C\] (corresponding saturation pressure of 3.6 kPa)?

    A) 92%                             

    B) 33%

    C) 50%                             

    D) 42%

    Correct Answer: C

    Solution :

    \[\eta =1-\frac{{{T}_{2}}}{{{T}_{1}}}=1=\frac{300}{600}\] \[=1=1-0.5=0.5\,\,\,or\,\,\,50%\]


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