http://www.patent-cn.com/2013/11/21/94792.shtml?
This thing is a HYDROBEE portable hydroelectric generator. You can search them on GOOGLE. The product is already available on the website, but it is announced that it will not go on sale until 2014.
Knowledge about small hydroelectric generators
Can be installed to generate electricity in a water machine!
1m^3 of water has a weight of mg=1000kgm/s^2
With a fall of 2m, the potential energy is mgh=2000kgm/s
p>< p>That is, the power is 2000 W.
The efficiency of a small underwater generator is calculated as 60%, and the output power can reach 1.2 kW.
If the height difference H is 10 meters, the internal diameter of the pipe is 10 centimeters and the flow rate is 5 meters/second, then the flow rate Q=V (3.14 D^2 /4 )= 5*(3.14 *0.10^2/4) = 0.03925 cubic meters/second
Water flow power
P = 9 .8QH = 9.8*0,03925*10 = 3.85 kilowatts,
Considering the efficiency of the turbine and generator, let's generate 2 kilowatts of electricity! Available to a farmer.
But such a small hydroelectric generator may not be available.