Renewable energy: solar powerEnergiestro (storing energy in concrete)

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Eric DUPONT
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Re: Energiestro (storing energy in concrete)

Unread Messageby Eric DUPONT » 02/01/19, 21:02

besides, I have good news to announce to you. The world's first reversible liquid nitrogen machine is going to be on sale, I can not wait to give you more information.
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Eric DUPONT
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Re: Energiestro (storing energy in concrete)

Unread Messageby Eric DUPONT » 02/01/19, 21:12

bardal wrote:Oh no, Yves, do not put a coin in the machine ... it has already been too long history of liquid nitrogen ...
You must never encourage delusional monomania ...


you have a welding problem, barda, on your demonstrator? come back when it will weld. :D
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Re: Energiestro (storing energy in concrete)

Unread Messageby Remundo » 02/01/19, 21:42

yves35 wrote:Good evening,
Moreover, with the same amount of heat in the delta, more energy is recovered from the cold than from the heat. with 1 kg of liquid nitrogen one can theoretically recover 240WH from electrical energy

I have a little trouble with that ... the energy goes from hot to cold not the opposite, right? how do you get energy from the cold?

yves

the principle is to use mechanical energy to refrigerate until liquefaction.

The reverse process (heat recovery from the cryogenic liquid) releases 1000 gas volumes larger than the liquid (approximately), and these gases can be expanded in turbines or air motors.
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Re: Energiestro (storing energy in concrete)

Unread Messageby Christophe » 03/01/19, 12:55

Yes, but with what overall storage performance? Or rather, what losses? And what installation cost?

Eric speaks in theory ... so which equations?

We saw above, thatin theoryyou can make a perpetual movement with compressed air ... : Cheesy:

And 0.24 kWh is a rather low energy value ...
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Re: Energiestro (storing energy in concrete)

Unread Messageby izentrop » 03/01/19, 20:32

The compression of a gas produces heat. If it is not stored and reinjected to decompression, the yield will be less than 50%
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Re: Energiestro (storing energy in concrete)

Unread Messageby moinsdewatt » 05/01/19, 12:36

Eric Dupont wrote:besides, I have good news to announce to you. The world's first reversible liquid nitrogen machine is going to be on sale, I can not wait to give you more information.


It will not hurry to the gate.
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Eric DUPONT
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Re: Energiestro (storing energy in concrete)

Unread Messageby Eric DUPONT » 05/01/19, 16:27

Why ?
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