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MEF 354 Thermodynamics Tutorial 2024

Tutorial Chapter 3 (Exergy, second-law analysis), MEF 354 Thermodynamics, Course Instructor Dr. Temgoua, University of Buea, College of Technology, Department of Mechanical Engineering: eight worked-example-style exercises on maximum power from a wind turbine, exergy flow rate of heat transfer from a furnace, irreversibility rate of a heat engine, reversible work and irreversibility of a cooling iron block, heating potential of the same iron block under a colder environment, second-law efficiency of resistance heaters, work potential of compressed air in a rigid tank, and exergy change during compression of refrigerant R-134a. Standard reference-table property values (air density, iron specific heat, R-134a enthalpy/entropy) are used and explicitly stated as assumptions where not printed on the source page.

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University of Buea

Faculty of Engineering and Technology - FET

Mechanical and Industrial Engineering - MEF

MEF3542024

Thermodynamics

Tutorial · Second Semester · Level 300

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A wind turbine with a 12-m-diameter rotor is to be installed at a location where the wind is blowing steadily at an average velocity of 10 m/s. Determine the maximum power that can be generated by the wind turbine.
Consider a large furnace that can transfer heat at a temperature of 2000 R at a steady rate of 3000 Btu/s. Determine the rate of exergy flow associated with this heat transfer. Assume an environment temperature of 77 ◦F.

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