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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 plant, the refrigerant leaves the evaporator at 195 kJ/kg and the condenser at 65 kJ/kg. For every kg of refrigerant the plant can supply per second a cooling load of:

    A) 70 kW              

    B) 100 kW

    C) 130 kW            

    D) 160 kW

    Correct Answer: C

    Solution :

    \[{{h}_{1}}\,\,=\,\,195\,\,kJ/kg,\] \[{{h}_{3}}={{h}_{4}}=65\,kJ/kg\] Refrigeration effect \[=\,\,{{h}_{1}}-{{h}_{4}}=195-65\]                                         = 130 kJ/kg


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