You are going from the engine through the belt, then an alternator, then the battery.
No matter what, we put a load on the engine. I am wondering if you can't use the spinning fly-wheel directly without having to take a ride on the Drive/Fan belt. Only a few percent. But isn't that is what were are looking for?
What you are doing is taking the energy to run the fan off the Grid, rather than the gas in the can. Not really trying to save in the Total Scheme of things? MPG
There may be another way. I just visited a Show. There was a car without any sort of water pump. It looked to me, to let the water boil, steam going up into the radiator, and the water would drop back into the block. I believe that it was a 1930's Chevy.
Then, you could get rid of the engine altogether? They do it most everyday here in my town. They have to due to pollution problems.
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