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A commercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at230°C by rejecting its waste heat to cooling water that enters the condenser at 18°C at a rate of 0.25 kg/s and leaves at 26°C. The refrigerant enters the condenser at 1.2 MPa and 65°C and leaves at 42°C. The inlet state of the compressor is 60 kPa and 234°C and the compressor is estimated to gain a net heat of 450 W from the surroundings. Determine the quality of the refrigerant at the evaporator inlet.<image 1>



(A) q=0.28


(B) q=0.38


(C) q=0.48


Answer with the option's letter from the given choices directly. No punctuation.


C


Difficulty: Easy

Subfield: Thermodynamics

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Input ID
8ec494e8-a631-4532-8ce2-c4b20add2974
Created
February 15, 2024
Permission
Public