EXERGY ANALYSIS

EXERGY ANALYSIS

Exergy analysis is a formalised way of applying availability theory to engineering
installations such as power generating plants. Energy (First Law) analysis keeps track of the
heat and work transfers but does not indicate the source and magnitude of the irreversible
entropy creation. Exergy (Second Law) analysis provides this information. It is useful in
indicating where research resources can be directed to best advantage.

Exergy Calculation

Exergy Calculation

This chapter is intended to give the user a better knowledge of exergy calculations in Cycle-Tempo.
Exergy is not an absolute quantity but a relative one. Therefore, to say something about it, it must be
known to which exergy level the calculation must be compared with. In Cycle-Tempo the exergy
calculations are based on the chosen environment conditions. So, it is necessary to set the environment
conditions in Cycle-Tempo or else an exergy calculation will not be made. Throughout this chapter the
environment is chosen to be like that of Baehr at 25o C.