The Exergy Cost Theory Revisited

This paper reviews the fundamentals of Exergy Cost Theory, an energy cost accounting methodology to evaluate physical costs products systems and their associated waste. Besides, a mathematical computationally approach is presented, which will allow practitioner carry out studies on production regardless structural complexity. The exergy theory was proposed in 1986 by Valero et al. “General savings”. It has been recognized as powerful tool analysis applied evaluation saving alternatives, local optimisation, thermoeconomic diagnosis, or industrial symbiosis. waste formation process presented from thermodynamic perspective rather than economist’s approach. consider external irreversibilities occurring plant processes. A new concept, called irreversibility carrier, introduced, identification origin, transfer, partial recovery, disposal