Q6:1. Entropy generation is also used to establish criteria for the performance of engineeringdevices. Explain this point.2. A well-insulated rigid tank contains 4 kg of a saturated liquid-vapor mixture of water at 250kPa. Initially, three-quarters of the mass is in the liquid phase. An electric resistance heaterplaced in the tank is now turned on and kept on until all the liquid in the tank is vaporized.Determine the entropy change of the steam during this process.3. Refrigerant-134a at 1 MPa and 100 °C is throttled to a pressure of 0.8 MPa. Determine thereversible work and exergy destroyed during this throttling process. Assume the surroundingsto be at 30 °C.4. Explain Figure Q6-4FIGURE Q6-4Thermal efficiency of the ideal Dieselcycle as a function of compression andcutoff ratios (k-1.4).0.60.30.40.30.20.1r. -1 (OttoTypicalcompressionrationleset8 10 12 14 16 18 20Compression ratio,

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1. Entropy generation is also used to establish criteria for the performance of engineering devices. Explain this point.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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