4. The schematic of a heat driven refrigerator concept is shown. It is supplied with heat...
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4. The schematic of a heat driven refrigerator concept is shown. It is supplied with heat -200 W from a reservoir at 250C. It removes heat c-350 W from the refrigerated space at -10C and rejects heat amb to the ambient at 30C. It operates at steady state and requires no work transfer. a. Establish whether this device violates the second law of thermodynamics. [4] b. If the answer to part a is no, then evaluate the COP of the refrigerator. [4] c. If the answer to part a is no, then determine whether the refrigerator is reversible. [2] d. If the answer to part c is no, determine &c for a reversible refrigerator supplied with the same QH and reservoirs. [6] e. Evaluate the COP of the reversible refrigerator in part d. [4] 30C 250C QH=200 W Qamb 3 Qc-350 W -10C [Total: 20 marks] 4. The schematic of a heat driven refrigerator concept is shown. It is supplied with heat -200 W from a reservoir at 250C. It removes heat c-350 W from the refrigerated space at -10C and rejects heat amb to the ambient at 30C. It operates at steady state and requires no work transfer. a. Establish whether this device violates the second law of thermodynamics. [4] b. If the answer to part a is no, then evaluate the COP of the refrigerator. [4] c. If the answer to part a is no, then determine whether the refrigerator is reversible. [2] d. If the answer to part c is no, determine &c for a reversible refrigerator supplied with the same QH and reservoirs. [6] e. Evaluate the COP of the reversible refrigerator in part d. [4] 30C 250C QH=200 W Qamb 3 Qc-350 W -10C [Total: 20 marks]
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Related Book For
Thermodynamics An Engineering Approach
ISBN: 978-0073398174
8th edition
Authors: Yunus A. Cengel, Michael A. Boles
Posted Date:
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