Air conditioners operate on the same principle as refrigerators. Consider an air conditioner that has 7.00 kg of refrigerant flowing through

Question

Air conditioners operate on the same principle as refrigerators. Consider an air conditioner that has 7.00 kg of refrigerant flowing through its circuit each cycle. The refrigerant enters the evaporator coils in phase equilibrium, with 54.0 % of its mass as liquid and the rest as vapor. It flows through the evaporator at a constant pressure and when it reaches the compressor 95% of its mass is vapor. In each cycle, how much heat Qc is absorbed by the refrigerant while it is in the evaporator? The heat of vaporization of the refrigerant is 1.50×105 J/kg

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Hưng Khoa 3 years 2021-07-22T12:41:28+00:00 1 Answers 138 views 0

Answers ( )

  1. thongdat2
    -3
    2021-07-22T12:42:58+00:00
    Reply

    Answer:

    5.15J

    Explanation:

    First. 54% of the 7kg refrigerant is liquid

    So we find mass of vapour at inlet generator

    M1 = ( 1-0.54)*7= 3.2kg

    At compressor mass of vapour will be

    M2= 0.95*7= 6.7kg

    So the Mass of vapour at exit generator is

    M2-M1= 3.5kg

    So to find heat absorbed by refrigerant in evaporation

    Its using

    Q= mh

    °= 3.5x 1.50×10^5 J/kg

    =5.15J

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