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Railways NTPC (Technical Ability) Refrigeration and Air-Conditioning Question Bank Refrigeration and Air-Conditioning

  • question_answer
    In a certain ideal refrigeration cycle, the COP of heat pump is 5. The cycle under identical conditions running as heat engine will efficiency as:

    A) Zero                             

    B) 0.20

    C) 1.00                             

    D) 6.00

    Correct Answer: B

    Solution :

    \[{{(COP)}_{HP}}=\frac{{{T}_{2}}}{{{T}_{1}}-{{T}_{2}}}=5\] \[={{\eta }_{H.E}}=\frac{{{T}_{1}}-{{T}_{2}}}{{{T}_{1}}}=\frac{1}{5}=0.2\]


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