The main idea of suggested device is presented in Fig.1
Fig.1 An illustration of the main idea for new type of mini hydro power plants
For example, we have a stream of water, and the speed of this stream is V. The ship is floating downstream.
On water it is stationary. Relative to the shore, he moves with the velocity V.
Relative the water its kinetic energy is equal to 0, relative to the shore
.
(m is the mass of the ship)
The ship turned on the engine and obtain speed over the water V1.
The increment of the kinetic energy of the ship relative the water is
and it equals to the work of propellers in ideal case.
Relative to the earth, ship is moving with the speed V+V1, and has a kinetic energy
So,
How the extra energy E=mV V1 was obtained?
This energy was obtained by decreasing the energy of the current!
To move forward, the ship drops of water ago kinetic energy.
Mass of discarded water= M, the of water velocity=V3.
Momentum gained the ship (p1), equal to the momentum of thrown water (p2)
so
The loss of kinetic energy of the flow
If M>>m, the size of can be neglected, so
The loss of kinetic energy of the current
and it equals our additionary energy.
Thus, actively pushing off from moving water, we could obtain more energy, then using this resource passively!
Fig.2 An example of turbine with active elements- water wheel with propellers.
Construction of power plants without dams will not only provide cheap electricity, but also improve the environmental situation in general.
For example, it is shown that the construction of dams on the Don and Kuban was the main reason for the decline of sturgeon populations in the Azov Sea[1].
References
- Вассель С.С. Липидный состав как показатель качества качества икры при искусственном воспроизводстве осетровых рыб. Диссертация на соискание ученой степени кандидата биологических наук/Москва, 2006
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