hi all. just to give you a background story - i am graduate student at U of Calgary in the ECE department. My colleague, from the Mechanical department did not show up yet, because of which I have to work alone on my project, including the mechanical part at which i am no expert but have some basic ideas. so here is what i am trying to figure out - i am trying to do optimization on ORC efficiency (thermal and exergy) and hence I need equations which are related to parameters/variables that I have control over (e.g. evaporator inlet pressure, mass flow rate of the working fluid,etc). All now i have are equations with enthalpies which really does not help for formulating an optimization problem, also I have equations related to heat source and cooling source temperatures (both inlet and outlet). but none of these aspects can be controlled right? i hope you understand my problem here, or else let me know may be I can try explain more elaborately. it will be great to come up with some useful equations for an optimization formulation. and anyone with any other suggestion or direction that i can work with, will be also very helpful. thank you all in advance...hoping to get some awesome feedback soon.take care!