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GreenPelton
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- TL;DR Summary
- Need some help how to calculate the needed kinetic energy and water speed to bring a 20w nano hydro power generator with a pelton wheel into motion!?
Hi
I am usually living off grid in simple huts in remote locations in Asia. A few months per year (rainy season) I don't have enough sun to produce solar power. I need very little electricity. My 20w solar panel produces enough electricity for my needs (lighting + charging a few small gadgets).
I thought to use the small streams with head close by to produce hydro power during that rainy and misty season.
For the nano hydro power project I got now a cheap small 20w hand crank (picture attached) and replaced the hand crank with a 3d printed pelton wheel.
These are the hand cranks specifications :
Stable Power: 3v/6.6A, 5v/4A, 6v/3.3A, 9v/2.2A, 12v/1.6A, 15v/1.3A for selection
■ Max Cranking power: 20W
■ Rotating speed: 2000rmp/min
Speed: 120 RPM (Recommended)
I need some help to calculate how much kinetic energy / water speed I need to start to turn the wheel in order to calculate how much head, pipe length and pipe diameter is required.
A friend tested that one needs to hang on the handle a bag with 500ml water to bring the handle into motion. The handle is 17cm long.
The diameter of the pelton wheel is 35cm. One spoon can hold about 50ml of water.
Can someone tell me how to calculate how much kinetic energy is needed to start the crank and how much is needed to reach 120rpm? Approximately (close by) would be enough.
As well how to calculate the necessary water speed to generate the necessary kinetic energy to bring the pelton wheel into motion?
I want to check before how much head, pipe length and diameter would be necessary for that kind of wheel. Maybe it isn't feasible (to much pipe length necessary since I have head but not very steep as well difficult to maintain and protect something which is out of sightfrom monkeys playing with it etc) and cost effective and I should better change the design and switch to a classic water wheel?
Hope someone knowledgeable can help me out!
Much appreciated!
I am usually living off grid in simple huts in remote locations in Asia. A few months per year (rainy season) I don't have enough sun to produce solar power. I need very little electricity. My 20w solar panel produces enough electricity for my needs (lighting + charging a few small gadgets).
I thought to use the small streams with head close by to produce hydro power during that rainy and misty season.
For the nano hydro power project I got now a cheap small 20w hand crank (picture attached) and replaced the hand crank with a 3d printed pelton wheel.
These are the hand cranks specifications :
Stable Power: 3v/6.6A, 5v/4A, 6v/3.3A, 9v/2.2A, 12v/1.6A, 15v/1.3A for selection
■ Max Cranking power: 20W
■ Rotating speed: 2000rmp/min
Speed: 120 RPM (Recommended)
I need some help to calculate how much kinetic energy / water speed I need to start to turn the wheel in order to calculate how much head, pipe length and pipe diameter is required.
A friend tested that one needs to hang on the handle a bag with 500ml water to bring the handle into motion. The handle is 17cm long.
The diameter of the pelton wheel is 35cm. One spoon can hold about 50ml of water.
Can someone tell me how to calculate how much kinetic energy is needed to start the crank and how much is needed to reach 120rpm? Approximately (close by) would be enough.
As well how to calculate the necessary water speed to generate the necessary kinetic energy to bring the pelton wheel into motion?
I want to check before how much head, pipe length and diameter would be necessary for that kind of wheel. Maybe it isn't feasible (to much pipe length necessary since I have head but not very steep as well difficult to maintain and protect something which is out of sightfrom monkeys playing with it etc) and cost effective and I should better change the design and switch to a classic water wheel?
Hope someone knowledgeable can help me out!
Much appreciated!