That is what I posted earlier. the best way to optimize a plant is to record the ins and outs of all the individual pieces of equipment, so you can predict what a given efficiency is going to be at a certain set of parameters, and choose the possible combination that give the best bottom line. It has to be a fuzzy logic type system that continually updates its knowns as they are experienced, interpolates between known data points, and continually evaluates conditions and determines which way to nudge current operating parameters. You almost have to have a full simulation of the existing plant running all the time, and try a few different combinations continually and if the result is better than current, move toward that.