Exergy performance measurement
Exergy analysis — Definitions

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Exergy performance measurement


Exergy analysis — Definitions

Authors : Riad BENELMIR, André LALLEMAND, Michel FEIDT

Publication date: January 10, 2002, Review date: October 3, 2019 | Lire en français

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7. Exergy performance measurement

We give below some exergy efficiencies and dissipative factors for the most common systems. Exergetic efficiency, η ex , based on the second principle of thermodynamics, like energy efficiency, η en , which in turn is based on the first principle of thermodynamics, measures the share of a product in relation to a resource for a given process or system. Other definitions of exer-gic efficiency can be found, such as the ratio of outgoing to incoming flow, etc. ηen= produit (énergétique)  ressource (énergétique)  et ηex= produit (exergétique)  ressource (exergétique) 

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