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Permacultura Aralar

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Commenced:	01/05/2008
Submitted:	23/04/2011
Last updated:	07/10/2015
Location:	ES
Website:	http://www.permaculturaaralar.com/
Climate zone:	Cool Temperate

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Water !!

Project: Permacultura Aralar

Posted by Victor Barahona over 12 years ago

It’s a special moment when you end the installation of water, open valves and water comes out wherever you want, clean and fresh, without effort or pumps, only by gravity’s force.

In previous articles I talked about the earth dam to harvest water, and water tanks in the highest point of the site. The house is 80 m from the dam and 10 m below, which give us a 1kg/cm2 pressure, enough to use it without problems. We made two water connections. The first one with a 1 inch tube goes to the house and water supplies inside, but has a branch to extend it to the garden, the picture shows the point at which delivery next to the garden, where we do a series of joints and put a timer for drip irrigation.

.... Water !!

But also throw a second line to generate a small amount of hydroelectric power. In this case we must reduce the maximum pressure drop (water friction with the tube, which in practice reduces the height between origin and destination and therefore the amount of energy that can be obtained). The pressure drop increases with joints, elbows, valves, if the tube is narrow... We need a thick tube and the more straight as possible. So, we use a 1.5 inches tube. In the picture we see evidence of valve opening, and we get an idea of its pressure and flow.

Hydraulic energy's supply

We have yet to attach the turbine and generator, which will be self-constructed, we will use recycled materials as a child’s bicycle transmission , plumbing pipe, electrical motor (from an old mixer)… We speak about this in a future thread.

Comments (2)

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Tom Kendall : in my instalation for a simular distance ive used 2 inch as the main supply then 1.5 inch offshoots for supplies(taps for a garden or trough}. this gives a real good supply without much friction loss. a bit more expensive but a good result.

Posted over 12 years ago

Victor Barahona : I'm agree with you Tom,a thicker tube of 2 inch could be much better. But I had several pieces of tube because I extended several lines in the site. So, I prefer use them and don't buy anymore at the moment. Perhaps in the future change them and reuse for other function. Other problem I had was my local dealer didn't have 2". He told me: "Nobody uses that". And that's all, folks :)

Posted over 12 years ago

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