Problem water supply for turbine Pelton hydro electricity

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Remundo
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by Remundo » 30/11/10, 11:00

compared to your data:
3000 L / h gives 0.83 kg / sec
180m

give a gross potential power 1465 W

with a mini Pelton, you can expect between 1000 and 1300 W Electric available batteries or directly tapping on the generator ...

0.83L / s is really a very small flow: advantage for forced driving that can be done cheaply ...
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chatelot16
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by chatelot16 » 30/11/10, 17:38

atention, I do not know the length of pipe!

the normal flow of 3m3 / h is not huge, but along 1km there will be a loss of non-negligable load ... should be calculated, but I see coming a big loss of power

ca makes even the most boring idé to increase the flow of the turbine to use the energy stored in the basin

Attentive to pressure! your current pipe is 9.5 bar down, support it 18bar? if you have to change it for the pressure, it will be worth to put a lot larger diameter, to have a possibility of higher power ... can even be 2 pipe to have at the same time the total pressure and the pressure of the basin

Energy use these stored 20kwh means emptying the tank ... do not miss drinking water must not be empty for all electricity
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by Gilles 2B » 30/11/10, 19:11

Thank you again, it is really fun to see how quickly you answer and your skill level.

I also think it would be better to change the pipe to a larger diameter, but what diameter because over 1000 meters, it costs an arm (and a half).

The tank was placed at mid height to just divide by 2 pressure because it is causing a reserve for domestic water and irrigation, thus nearly KG 10 and 32 mm diameter was widely sufficient.

Now that I've plugged in a generator, I realize that the installation is not suitable.

If I pull a second pipe from the tank, I would have a huge reserve but half of the theoretical maximum pressure, so, given the capabilities of my generator (1100 W) I preferred the pressure and thought of a valve allowing to turn the tank off.

I specify that with the basic installation is 9 bars, the turbine hardly supplies the necessary voltage (> 24 volts) so it turns too slowly, if I put my "by-pass" and that I remove the passage through the tank , I think to run the turbine fast enough, and this for 5 to 6 hours at night, and only in winter, because in summer, there is less water but more sun, so the batteries are recharged without problem .

I consider a replacement hose or another adaptation of an additional material but I would be sure of the result.

Not that I want to empower anyone but I'm really new at this, I need to know if it takes a tap or valve, over water or after installation .. .etc

I always look for the green alternative to problems but if I have learned a lot in photovoltaic, solar thermal and geothermal, and even diesel dual-fuel diesel engines for HVP, I try to improve myself really in hydraulics, and especially hydroelectricity.

And for now, I swim ...

But I still put the cart before the horse by installing a generator on my existing water circuit and trying to understand after the fact why it loads so little batteries, but it's my way forward.

I count on you to free myself completely from fossil fuels by permanently stopping my generator which is the last link that connects me to the titanic family producers
of CO².

I also hope for those who have the opportunity to visit the eastern coast of Corsica (the most preserved, the most "natural"), that I can offer you an aperitif with ice cubes made with spring water and green electricity, while admiring my hydroelectric installation ....


Thank you again to all
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by chatelot16 » 30/11/10, 19:27

by having to calculate the theoretical pressure drop, you can already measure it, by putting a manometer next to your turbine, and by measuring the turbine pressure on and off

polyethylene is not the most economical for high pressure and large diameter: the steel tube remains the cheapest

however like your turbine?
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by bernardd » 30/11/10, 20:05

The best tube now: HDPE. But better protect from the sun to be sure of the resistance over time (pb UV), especially in your area!

To check the pressures:
http://www.infra-tech.be/rubrique.php3?id_rubrique=22

Until they 1200mm diameter :-)

the most classic:
http://www.sotra-seperef.com/tubes-pe-h ... ronnes.php

still up inside 60mm and length.

If the price does not increase too fast, you have better take a little above what you normally need, because the section increases quickly, as the square of the diameter.

Prices online:

http://www.anjou-connectique.com/tube-p ... sort_order

http://www.batirmoinscher.com/catalogue ... egorie=295
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by Forhorse » 30/11/10, 20:27

I know much turbine, but are you sure that the water injection angle is good?
because arriving in a different plane from that of the turbine does not seem the best configuration.
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by Gilles 2B » 30/11/10, 20:31

This is hair cell the angle indicated by the manufacturer (Italian) of the Pelton wheel, I held myself, thinking this is what to do ....
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by Alain G » 30/11/10, 20:37




Hi Gilles!

The belt used is not the best way to transfer torque between the turbine and the generator!

I do not see very well on the first picture if you have a half Pelton, if you can put a picture closer.


To insert a photo copy the link in the rectangle and not the link, your photo will appear directly anisi not a link!


What is the model and brand of your Pelton?
Last edited by Alain G the 30 / 11 / 10, 20: 47, 1 edited once.
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by Gilles 2B » 30/11/10, 20:47

Hi Alain,

Yes it is a Pelton so "half spoons", because I found a custom manufacturer who calculated this for me according to the flow rate and head available, and who told me that it is with that I would have the best return.

I will try to put live photos on my answer and tomorrow I will do more specific ones


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