i think im in a wrong section,but it has some similarity to this.
So i came up with an idea after watching one post about moving floors in skyscreapers and collecting energy that way,but theymade a conclusion that it would lose more energy than it gets.
By my idea there are two tanks (connected with a tube that has high efficiency turbine) with equal volume and 1 of them is filled with water.On both tanks there are weights but the mass of the weight in tank filled with water is 2 times bigger than the other one.Also water has a mass as the lighter weight.So the heavier weight pushes water thru turbine which also raises other weight as the water fills the tank.So now with electromagnets you bring the lighter weight back down which again pumps the water thru turbine which fills the first tank and generates electricity.
Explanation isnt quite good but its hard to explain,and i would post photos but dont know how.Also sorry for spelling mistakes.