Exergy in energy conversion processes

Abstract

Limitations of energy conversion processes have been presented and after their discussion the exergy concept introduced using the most general definition of this thermodynamic quantity. Balancing exergy in processes differs from balancing procedures of energy so that the special behavior of exergy had to be stated and carefully considered. As a result the concept of exergy transition in a process could be introduced and on its base the generalized exergy rating quotient, the thermodynamic effectivity formulated. Some examples do illustrate its meaning and possibilities — from the quotient other widely used exergy efficiencies could be derived as special cases.