Lecture 29: Useful Work, Exergy, and Second Law Efficiency (Engineering Thermodynamics Lectures) @bahgalabiitdelhi7797

Uploaded December 2020 | Updated September 2026, 1 day ago

In this lecture, we introduce the concepts of useful work and exergy. We show that for a system not in equilibrium with the surroundings, useful work can always be obtained from the system and the maximum useful work is given by the change in the availability. For a given initial state of the system, if the system undergoes a process and reaches equilibrium with the surroundings, then that maximum useful work is called the exergy. We consider the useful work by both a closed and an open system. We also discuss the concepts of irreversibility and second law efficiency. We present various examples to explain the significance of second law efficiency. (c) Supreet Singh Bahga, IIT Delhi

Lecture 29: Useful Work, Exergy, and Second Law Efficiency (Engineering Thermodynamics Lectures)

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