Imagine what conditions must be met to reach 100%. First: There is no friction between water flowing from a high place and the stream, because friction would slow it down and lose energy. Second: the connection between flow; at the bottom and the generator runner. The leaves collide, and the water stops after the collision, because if there is still speed forward or backward, there is still residual energy that has not been converted into energy electric. Third: all the water that flows; the bottom collides and there is no space for the water to drain. If when it flows, part of the water's energy is lost; fourth: the generator does not generate heat during rotation, because heat is also a waste of energy; .
Let me use the 20 multiplication method to take a look:
Taking the dam water as the research object, 10% ofthe reduction of gravitational potential energy before and after is converted into electrical energy, < /p>
The gravitational potential energy of the water in the dam at the beginning is E1=m1gH/2, H=20m, m1 =1*10^7*1*10? *20
The gravitational potential energy of the water in the dam after electricity production Gravitational potential energy E2=m2gh/2, h=18m, m2=1*10^7*1* 10?*18< /p>
Electric energy converted E0=10% (E1-E2) = 10% (m1 -m2) (H-h)g/2,
Both conversions of electric energy are equal, < /p>
E=2E0=2*10% (m1-m2) (H-h)g/2
Just bring in the data for calculation.
A simpler method:
Consider only the decrease in the potential energy of water above sea level. The height of the center of gravity drop of water above sea level. is h1=(H-h)/2=1m< /p>
The gravitational potential energy decreases by mgh1 each time, m=1*10^7* 1*10?*2
A total of 2 mgh1decreases twice,
So E= 2mgh1*10%