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Posts Tagged ‘rhubarb’

Dismantling of the rhubarb electric generator

Hello.

Here are the pictures of the dismantling of the rhubarb electric generator. 

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Above, a picture of the elements that composed the electric generator (zinc + copper + electrical wire).

Démontage du générateur électrique à rhubarbe, photo 2

The first step consists in removing the electrical wires (picture above).

Démontage du générateur électrique à rhubarbe, photo 3 Straterra online buying

You then put aside the zinc elements (picture above).

And set aside the copper elements (picture below) :

Démontage du générateur électrique à rhubarbe, photo 4

The last step consists in taking a sponge, to water the elements and rub well (put the element un the middle of the sponge, close then pull towards you).

Démontage du générateur électrique à rhubarbe, photo 5

The zinc elements are now cleaned (picture above). There still stays an area a bit black. If someone know how to completely clean the zinc elements, plus leave a comment below.

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Above, the copper elements (much easier to clean).

If yourself are actually working on small electric generators (or even big), please register to The Transition Project to present them on this site (maybe get sponsored).

Regards.

Guillaume, experiment coordinator Rhubarb electric generator



[Experiment 1] 12 Volt rhubarb generator

Hello.

During the summer 2012 Francophone Meetings, I was able to build a rhubarb generator.

The objective of the experiment was to reach 12 V with 2 leafstalks of rhubarb.

With the first leafstlk, I amost got to 6 V (picture above!)

So I continued to cable the rhubarb pieces in series to increase the voltage.

And there! I got past 6 V !

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On this 3rd picture, we can see that the 11 V have been exceeded !

This is the picture zoomed on the multimeter. It shows  11,30 V !

A week and a day later, the rhubarb has aged well. It has become black.

Here we can see a mould formation.

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Here we can see well the colour transformation from dark pink to black.

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Tension has well decreased. It is now at 2,08 V.

 On the intensity side, we have  145 µA.

As for the electodes, we can immediately notice a strong oxydation to anode (the rode is zinc).

To the question « Is it  possible to create a 12 V rhubarb generator ?« , the answer is yes (and even more).

On the one hand, it doesn’t last a week (contrary to the potato generator, which on it’s side, has the disadvantage to take up more space than the rhubarb generator that has a good ratio tension / space).

On the other hand, rhubarb doesn’t cost much and can almost provide 6 V per leafstalk…

Regards.

Guillaume, coordinator « experience 12 Volt rhubarb generator »