Exergy

Exergy(Ex) is defined as the amount of work (=entropy - free energy) a system can perform when it is brought into thermodynamic equilibrium with its environment.

i.e. IAmax I = Exergy(Ex); ( Jorgensen et al., 1999

From: Towards A Thermodynamic Theory For Ecological Systems, 2004

Total Efficiency Coefficient, (T.E.C.)

T.E.C. Is the closest possible approximated measure of energy expended in any biochemical and or socioeconomic process from start (A) to finish (B) generally portrayed in calories and represented as a percentage in decimal form.

i.e. A boat carrying a load from South Africa to Beijing has a stand still value of (Xcalories) @ point (A)=Xcal. divided by the total calculable energy in calories expensed in “fuel”, “labor”, “payload loss” and “mechanical breakdown” used upon reaching point (B)=Xcal. where {Xt.e.c. = (A)Xcal. / (B)Xcal.}.

*Xt.e.c. = Total Efficiency Coefficient, (T.E.C.)