Available Energy and Exergy

Authors : Richard GAGGİOLİ

Pages : 1-8

View : 18 | Download : 6

Publication Date : 1998-06-01

Article Type : Research Paper

Abstract :An `available energy` is defined for every state of any system. The definition is independent of insert ignore into journalissuearticles values(a); the concept of work. insert ignore into journalissuearticles values(b); any reference environment, and insert ignore into journalissuearticles values(c); the makeup of the system insert ignore into journalissuearticles values(e.g. `macro` or `micro);. On the basis of this available energy, given any composite system, the contribution of each subsystem to the available energy -- that is, the exergy content of a subsystem -- is defined, as well as the instantaneous `dead state` of the composite and each subsystem. Some pedagogical, scientific and engineering implications are discussed.
Keywords : available energy, thermostatic state, equilibrium, exergy, dead state