finding the "energy balance" of a hydroelectric power generator I proposed a new hydroelectric energy idea to somebody and they asked me for a "energy balance". I know nothing about physics or anything relevant to calculating something like this. If somebody asked you for the energy balance of a dam, how would you go about finding that? Would you know exactly what they meant by energy balance, if not, what would you ask to get them to clarify? so far I see equations relating to thermodynamics but I'm not sure why you would want to calculate the thermodynamics of dam. Just a reminder, I am ignorant so simplistic and very descriptive wording is appreciated.