Abstract
In this chapter, theoretical and practical aspects of thermodynamics most relevant to energy and exergy analyses are described. Mass, energy, entropy, and exergy balances are discussed. The exergy of systems and flows is explained, as is exergy destruction. Exergy analysis is a thermodynamic analysis technique based on the Second Law of Thermodynamics (SLT), which provides an alternative and illuminating means of assessing and comparing processes and systems rationally and meaningfully. Exergy analysis can assist in improving and optimizing designs. The chapter reviews fundamental principles and such related issues as reference-environment selection, efficiency definition, and material properties acquisition. General implications of exergy analysis results are discussed, and a step-by-step procedure for energy and exergy analyses is given. Furthermore, an exergy nomenclature is described.
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