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

  • question_answer
    In a vapour compression refrigeration cycle, following data are obtained:
    Ethalpy at suction to the compressor : \[180\,\,kJ/kg\]
    Ethalpy at discharge from the compressor : \[210\,\,kJ/kg\]
    Enthalpy at exit from : \[80\,\,kJ/kg\]
    What is the C.O.P. of the cycle?

    A) 5.33                             

    B) 4.33

    C) 3.33                             

    D) 2.33

    Correct Answer: C

    Solution :

    \[COP=\frac{{{h}_{1}}-{{h}_{4}}}{{{h}_{2}}-{{h}_{1}}}=\frac{180-80}{210-180}=\frac{100}{30}=3.33\]


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