Exergy is defined differently in different fields of study. In thermodynamics, exergy is defined as a measure of the actual potential of a system to do work. In systems energetics, exergy has been defined as entropy-free energy. The latter definition is also related to the negentropy concept which aims to measure the work performed by biological systems. It is unclear whether these definitions are equivalent
(Physics & Chemistry) The maximum amount of work that can be obtained from a process, or from a system by reversible processes
is property used to determine the useful work potential of a given amount of energy at some specified state It is important to realize that exergy does not represent the amount of work that a work-producing device will actually deliver upon installation Rather, it represents the upper limit on the amount of work a device can deliver without violating any thermodynamic laws is property used to determine the useful work potential of a given amount of energy at some specified state It is important to realize that exergy does not represent the amount of work that a work-producing device will actually deliver upon installation Rather, it represents the upper limit on the amount of work a device can deliver without violating any thermodynamic laws
(spelled with an 'x') analysis is based on the combination of the first and second laws of thermodynamics Exergy, itself, is defined as the maximum amount of work potential (in energy units) of a system in relation to the surrounding environment The exergy of a system is that part of the system's energy that is available to do work Due to the limitations of the first and second laws of thermodynamics, the exergy of a system depends on the surrounding environment