from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. In thermodynamics, a measure of the actual potential of a system to do work.
  • n. In systems energetics, entropy-free energy.


Sorry, no etymologies found.


  • Some of these forms are based on concepts developed in the energy analysis literature such as exergy or emergy analysis.

    Energy quality

  • In Thermodynamics, it is called a "Perpetual Motion Machine", one that delivers useful work output, which exceeds the intrinsic value (known as "exergy") of its energy input. Home Page

  • The study, carried out by Abolfazl Ahmadi and Mehdi Ali Ehyaei of the Department of Mechanical Engineering, at Iran University of Science and Technology-Arak Branch, in Arak, investigated the "exergy" of wind power.

    Gaea Times (by Simple Thoughts) Breaking News and incisive views 24/7

  • Göran Wall is an independent teacher, researcher, and consultant, at present engaged in the E Group, an international group to increase the understanding and the use of the exergy concept, the Encyclopedia of Life Support Systems (EOLSS), and an editor of Exergy, An International Journal.

    Contributor: G��ran Wall

  • As Hornborg put it in 1998, “market prices are the means by which world system centres extract exergy (i.e. available energy) from the peripheries”, aided some times by military power.

    Herman Daly Festschrift~ Socially Sustainable Economic Degrowth

  • Nuclear power in this format has an exergy ration of many thousands.

    Oil Shale, Arnold Kling | EconLog | Library of Economics and Liberty

  • Mechanical exergy is known as kinetic energy, while thermal exergy is more familiarly known as heat.


  • Unlabeled dashed circles along these paths represent natural exergy destruction processes such as precipitation and plant decay that are small compared to the natural destruction modes of solar exergy.


  • Exergy flux is represented by paths ending in shaded areas of natural exergy destruction or arrows representing anthropogenic destruction for energy services.


  • Chemical exergy is used in chemical engineering and thermoeconomics for process optimization, but also in economics and environmental science.



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