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Discussion :: Refrigeration and Air Conditioning

  1. A refrigerating system operating on reversed Brayton refrigeration cycle is used for maintaining 250 K. If the temperature at the end of constant pressure cooling is 300 K and rise in the temperature of air in the refrigerator is 50 K, then the net work of compression will be (assume air as working substance with Cp = 1 kJ/kg)

    2. A.

     25 kJ/kg
    B.

     50 kJ/kg
    C.

     100 kJ/kg
    D.

     125 kJ/kg

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    Workspace

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    Answer : Option B

    Explanation :

    A refrigerating system operating on reversed Brayton refrigeration cycle is used for maintaining 250 K. If the temperature at the end of constant pressure cooling is 300 K and rise in the temperature of air in the refrigerator is 50 K, then the net work of compression will be 50 kJ/kg

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