Definitions for exergy
ex·er·gy

WiktionaryRate this definition:2.0 / 1 vote

1. exergynoun

   In thermodynamics, a measure of the actual potential of a system to do work.

2. exergynoun

   In systems energetics, entropy-free energy.

WikipediaRate this definition:0.0 / 0 votes

1. Exergy

   In thermodynamics, the exergy of a system is the maximum useful work possible during a process that brings the system into equilibrium with a heat reservoir, reaching maximum entropy.[2] When the surroundings are the reservoir, exergy is the potential of a system to cause a change as it achieves equilibrium with its environment. Exergy is the energy that is available to be used. After the system and surroundings reach equilibrium, the exergy is zero. Determining exergy was also the first goal of thermodynamics. The term "exergy" was coined in 1956 by Zoran Rant (1904–1972) by using the Greek ex and ergon meaning "from work", but the concept had been earlier developed by J Willard Gibbs (the namesake of Gibbs free energy) in 1873.Energy is neither created nor destroyed during a process. Energy changes from one form to another (see First Law of Thermodynamics). In contrast, exergy is always destroyed when a process is irreversible, for example loss of heat to the environment (see Second Law of Thermodynamics). This destruction is proportional to the entropy increase of the system together with its surroundings (see Entropy production). The destroyed exergy has been called anergy. For an isentropic process, exergy and energy are interchangeable terms, and there is no anergy.

WikidataRate this definition:4.0 / 1 vote

1. Exergy

   In thermodynamics, the exergy of a system is the maximum useful work possible during a process that brings the system into equilibrium with a heat reservoir. When the surroundings are the reservoir, exergy is the potential of a system to cause a change as it achieves equilibrium with its environment. Exergy is the energy that is available to be used. After the system and surroundings reach equilibrium, the exergy is zero. Determining exergy was also the first goal of thermodynamics. The term "exergy" was coined in 1956 by Zoran Rant by using the Greek ex and ergon meaning "from work.". Energy is never destroyed during a process; it changes from one form to another. In contrast, exergy accounts for the irreversibility of a process due to increase in entropy. Exergy is always destroyed when a process involves a temperature change. This destruction is proportional to the entropy increase of the system together with its surroundings. The destroyed exergy has been called anergy. For an isothermal process, exergy and energy are interchangeable terms, and there is no anergy. Exergy analysis is performed in the field of industrial ecology to use energy more efficiently. The term was coined by Zoran Rant in 1956, but the concept was developed by J. Willard Gibbs in 1873. Ecologists and design engineers often choose a reference state for the reservoir that may be different from the actual surroundings of the system.

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Numerology

1. Chaldean Numerology

   The numerical value of exergy in Chaldean Numerology is: 3

2. Pythagorean Numerology

   The numerical value of exergy in Pythagorean Numerology is: 3

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References

1. ^ Wiktionary
   https://en.wiktionary.org/wiki/Exergy
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Exergy
3. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=exergy