Search found 901 results

by raymon
12/07/16, 13:16
Forum : Innovations, inventions, patents and ideas for sustainable development
Subject : sodium-sulfur batteries and electricity storage (comparative)
answers: 9
views: 16059

Re: sodium-sulfur batteries

The price of the energy stored me seem very important (70 € / kWh for electricity sold to 0.15 € / kWh by EDF ???): raymon spoke of 3 cents per kWh for STEP?

Yes there is a confusion 70 euros / kwh is to have a storage 1 kwh, 3cts is the cost of a kWh consumed.
by raymon
11/07/16, 18:07
Forum : Hydraulic, wind, geothermal, marine energy, biogas ...
Subject : New hydraulic turbine technology
answers: 22
views: 18244

Re: hydraulic turbine technology

Effective turbine leaves very little water escaping around her pale

It looks like a "virtual" worm. So this can possibly recover a lot of energy from the water rubbing longer on the rotor.
by raymon
11/07/16, 00:15
Forum : Hydraulic, wind, geothermal, marine energy, biogas ...
Subject : New hydraulic turbine technology
answers: 22
views: 18244

Re: hydraulic turbine technology

Water arrives on the perimeter and down the middle.
It is precisely this that is interesting since the water by turning the principle is different it is not a simple venturi effect.
by raymon
10/07/16, 16:36
Forum : Hydraulic, wind, geothermal, marine energy, biogas ...
Subject : New hydraulic turbine technology
answers: 22
views: 18244

Re: hydraulic turbine technology

I find the concept interesting because it through on a slightly different principle of Kplan example. But interesting because it is the first time I see a turbine using a vortex to operate. It remains to know the rendement.Mais difficult to do better than Kaplan.
by raymon
09/07/16, 09:41
Forum : Hydraulic, wind, geothermal, marine energy, biogas ...
Subject : New hydraulic turbine technology
answers: 22
views: 18244

New hydraulic turbine technology

Miroslav Sedláček finalist for the European Inventor Award 2016 has created a really strange new hydraulic turbine system: http://positivr.fr/setur-bladeless-turbine-hydraulique-miroslav-sedlacek-electricite-eau/?mc_cid=9391e77275&mc_eid = 6d676277b4 http://vortexhydro.com/index.php I have ...
by raymon
08/07/16, 09:04
Forum : Solar thermal: solar collectors CESI, heating, hot water, stoves and solar cookers
Subject : inter seasonal storage solar thermal
answers: 362
views: 102904

Re: inter seasonal storage solar thermal

In fact you know the zeolite it seems interesting we could almost open a new subject: Concretely, the realization of this heating of the future would consist in placing this reactor on a hot source, at the exit of a household waste incinerator for example or of an installation ...
by raymon
07/07/16, 14:18
Forum : Solar thermal: solar collectors CESI, heating, hot water, stoves and solar cookers
Subject : inter seasonal storage solar thermal
answers: 362
views: 102904

Re: inter seasonal storage solar thermal

raymon wrote: @ lilian07 There is something that bothers me in this system is that you have to be sure that there is not too much groundwater circulation otherwise the calories may go into the water table phreatic. And why do you think we do core samples to find out the composition of the sub ...
by raymon
07/07/16, 12:08
Forum : Solar thermal: solar collectors CESI, heating, hot water, stoves and solar cookers
Subject : inter seasonal storage solar thermal
answers: 362
views: 102904

Re: inter seasonal storage solar thermal

@lilian07
There is one thing that bothers me in this system is that you have to be sure there is not too much traffic groundwater if not calories risk from ground water.
by raymon
01/07/16, 20:14
Forum : Economy and finance, sustainability, growth, GDP, ecological tax systems
Subject : Victory Brexit: consequences for Europe?
answers: 116
views: 34098

Re: Victory Brexit: consequences for Europe?

You scare me ? what would happen if a multitude of refrendums took contradictory decisions? who would run? good democracy remains to be invented, because I do not see a very effective current democracy We are not obliged to vote every week for the decisions taken ...
by raymon
01/07/16, 16:00
Forum : Economy and finance, sustainability, growth, GDP, ecological tax systems
Subject : Victory Brexit: consequences for Europe?
answers: 116
views: 34098

Re: Victory Brexit: consequences for Europe?

democracy is very complicated. Because you confuse democracy and representative democracy. Democracy is for example a referendum of popular initiative, representative democracy we elect a representative and then this representative does the opposite of what he promised, example Hollande the ...

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