Choose a hydraulic micro turbine: Pelton or propeller?

[lilian07]

I have a 150 waterproof storage tank m3 10m with a vertical drop of 8 months per year by a stream of about 25 m3 / h on average and I hesitate to put a micro turbine. I am considering a Pelton micro with PE from 25mm but I am in energy fields from 150 to 200W. Can be seen in addition to PV and an injector inverter to crush the constant residual consumption of devices always powered.

Edit moderation, see also: energies-renewable / storage-gravity-t13798.html

[Obamot]

... but when you know the hour of earthwork billed (200 to 300 € / h) I think the bill can quickly climb!

Small step on costs!
It was Dede who was right somewhere. If we take augmented geothermal energy, the price of drilling at 20'000 € the cost of the well must be very overrated. I do not know how long it would take to get down to -350 m? But 60 or 100 € per hour, assuming that a week is sufficient, it would be between 4'000 € / 5'000 €, 25% hazards for hard floors included and again with an acceptable margin. But obviously it would require an industrial solution with a well filled order book, go ... 8'000 € drilling (the price of 2 PAC). And a simple and effective solution with guaranteed result, it would jostle to have one !?

Where there's a will, there's a way! Just lack the political will and that would be a good retraining for the oil companies ...

[izentrop]

I have a 150 waterproof storage tank m3 to 10m of elevation gain

That's 4 kWh of potential energy, but will not expect more than 50% of efficiency http://enrj.renouvelables.free.fr/energ ... lique.html

We are actually talking about another forum http://www.onpeutlefaire.com/forum/topi ... ntry258443

[Christophe]

4KWh ... in short ... a good battery does better ... for 10 to 20 times cheaper in investment ...

A big battery of 200 Ah 80% discharge is 0.8 * 200 * 12 = 1.92 kWh put 2 not to unload too much ... and much less annoying than a gravity storage ...

On the other hand a battery will not recover the energy of the rain

[izentrop]

On the other hand a battery will not recover the energy of the rain

No rain, but the sun will be more profitable for the same investment;)

[raymon]

For small installations I doubt the profitability of storage with water unless we have a system already built. The ecological impact is much stronger than an offshore storage. Small is not beautiful. A seawall for several km2 at sea built for 100 years will be much more profitable. The thickness of the dike will not be greater whatever the diameter.

[lilian07]

I confirm the reserve has existed for at least 200 years.

At the time we needed less energy and this tank was enough to power a wheel (200 300W) and operate a company during periods of drought ... (recharging by a source at night)

aqueduct

It's really our consumption that is monstrous today ....

In any case, even if the "recoverable" potential energy is 4 kWh, this pico turbine and reserve system supplied for 8 months a year by a stream must be associated with a buffer battery in order to have no cut-off when starting the turbine.

The kind of turbine that interests me:
http://www.ebay.fr/itm/191154591960?_tr ... EBIDX%3AIT

Budget required in total around 500 euros (limit profitable).

[Christophe]

Waaw nice context, say lilian07 we will now call you Lilian, the Ardèche Knight

Attention the turbine that you quote on ebay is a pelton, it needs a strong pressure to function correctly (20 bars mini ...)

A turbine of this type will work better in your case I think: https://www.econologie.com/telecharger-p ... mergeable/

[lilian07]

Ah yes that the context is nice ... thank you for the link on the turbine, indeed the characteristics of the brook / reserve are limited for a Pelton and limit for the turbine mentioned in the links ... I had considered the Pelton with a double or triple water supply to 10m ('which is not equivalent to 20m) and therefore a voltage and power lower than expected but exploitable time that the voltage can power a battery of 12V where my calculation to 200W rather than to 500W. (it's limited ...)

[Christophe]

Uh ... 20 bars is 200 m (for industrial Pelton) ... Chinese are good to manufacture and sell ... to explain precisely, much less ... so make sure before buying that c is adapted to your situation!

If you have 10 m drop, 1 pressure bars, I do not think you get more than 10 15% of the nominal power with a Pelton ... to check! A builder must provide the curves ... otherwise go elsewhere

Here is 2 .pdf entirely devoted to the Pelton Turbine:
A very complete:

Etude_pelton.pdf

(2.92 million) Downloaded times 629

A faster test on a test pico turbine 5W:

pelton_essais.pdf

(201.97 KB) Downloaded times 15812

power: 5W to 500min-1, approx. 30L / min, H = 2m

This page should help you: https://www.econologie.com/calculer-puis ... chute-eau/