Evaluation

Input	Output
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.	Google: Gemini Pro Vision 1.0 mmmu / Energy_and_PowerPublic C Difficulty: Easy Subfield: Thermodynamics

Input

Output

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

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

Google: Gemini Pro Vision 1.0

mmmu / Energy_and_PowerPublic

Difficulty: Easy

Subfield: Thermodynamics

Evaluation ID: 00b3fdf0-a5e0-40b9-bdd8-fd2f51b1ef2f
Created: February 21, 2024

Raw Output

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