Nomenclature for Exergy Analysis

Abstract

In this paper a system of names and symbols for exergy analysis is put forward for further discussion. The concept of exergy is shown to be dependent on that of the environment. The conceptual environment provides a natural reference state for calculating absolute values of exergy. For calculating loss of exergy, or process irreversibility, an exergy balance or the Gouy–Stodola relation can be used. The concept of chemical exergy can facilitate the computational work involved in exergy analysis. The paper offers a glossary of terms used in exergy analysis and shows the proposed symbols in the context of expressions in which they might be used.