Comment Q:Water / Oil seperation A:Distilation (Score 1) 144
I should think the water won't last long in the oil as its being heated to 700 degrees, the watter should boill off and be recoverable with a condensor. This is assuming that you would want a closed circuit for the water.
If the plant isn't efficient as per "energy out" / "energy in" it could still be efficient as per "total energy out lifetime" / "total cost in dollars lifetime".