Renewable energies: when we want, we can!

Renewable energies except solar electric or thermal (seeforums dedicated below): wind turbines, energy from the sea, hydraulic and hydroelectricity, biomass, biogas, deep geothermal energy ...
the middle
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by the middle » 03/06/11, 08:07

An example in Austria, of common sense and of wanting:
http://www.rtbf.be/info/videos/detail_l ... &setId=323
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Leo Maximus
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by Leo Maximus » 03/06/11, 10:33

dedeleco wrote:.... The lightning that I received was so strong that it made a hole in the burnt roof, the air conditioning, the electric meter and the fridge and set fire to the rubber of the air conditioning.

A good lightning rod would have deviated towards the earth but I am not sure of total protection.
I put in a lightning rod but I am the only one with hundreds of meters !!!
It is not that simple with direct lightning on the house.

Good but in my village the lightning rods are INTERDITS ! : Shock: : Evil: for (de) aesthetic reasons. Anyonewak.

I put lightning arresters to protect the most sensitive equipment but the efficiency is still limited so when there is a storm I unplug!
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by the middle » 21/11/11, 08:15

And there you go ...
You have to look a little, and add a little money, then the solutions arrive :D
http://www.rtflash.fr/stocker-l-energie ... ur/article

Store solar energy as heat

For the first time, scientists from the Institute for Technical Thermodynamics of the German Aerospace Research Center (DLR) have successfully commissioned a heat accumulator coupled to a solar thermoelectric power station. Developed by the team of Wolf-Dieter Steinmann in cooperation with 13 partners from research and industry (from 5 countries), the accumulator aims to store, in the form of latent heat, part of the energy solar recovered by the power plant. Thanks to this storage system, the power station must be able to produce electricity at night or in cloudy weather.

The accumulator (nitrate salt) is made up of several layers of graphite and materials, characterized by a phase change at almost constant temperature, which allow thermal storage by latent heat. Installed on the Almeria solar research platform in Spain, the device delivers a power of 100kW with water vapor temperatures exceeding 200 degrees Celcius. It is capable of storing heat for 10 hours and releasing up to 90% of it on time.

At the same time, DLR researchers want to apply their storage concept to a 1MW installation and achieve storage temperatures of over 300 degrees Celcius. "With the concept of the latent heat accumulator, the basic condition has been achieved. use of solar heat for industrial processes, ”explains Harald Pandl of DLR.

TS
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by the middle » 21/11/11, 08:19

: Shock: again Tata :D
http://www.rtflash.fr/feuille-artificie ... on/article

An artificial leaf that can heat a house

Researchers at the Massachusetts Institute of Technology (MIT) led by Daniel NOCERA have developed an artificial leaf that produces energy ten times faster than natural photosynthesis, and which could create enough energy to heat a house for a day. A scientist had already created the first artificial leaf more than a decade ago, but that of researchers at MIT is smaller, more powerful and less expensive than that of Turner.

Professor Daniel Nocera recently presented his model in California. It is a sophisticated solar device the size of a playing card that is allowed to float in a container of water. Much like photosynthesis performed by a natural leaf, the leaf uses sunlight to separate the two essential components of water, oxygen and hydrogen, which are then used to generate electricity. .

The design of this new prototype, which also contains silicone and electronic circuitry, was made possible by the discovery of new, powerful and inexpensive catalysts in nickel and cobalt. The sheet ran for at least 45 hours straight without stopping during the preliminary tests. Nocera estimates that with four liters of water, one leaf could produce enough electricity for a home in a developing country for one day. It did not take more for some British tabloids to rave: "Scientists claim to have found the 'holy grail' of science with an artificial leaf that could turn every British home into its own power station."

The invention is about to be commercialized by Indian giant Tata Group, which has already made an agreement with the MIT researcher to build a refrigerator-sized power plant over the next 18 months. At the moment, Nocera mainly targets developing countries.

Daily Mail

Free Energy Times
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by Christophe » 21/11/11, 09:49

lejustemilieu wrote:And there you go ...
You have to look a little, and add a little money, then the solutions arrive :D
http://www.rtflash.fr/stocker-l-energie ... ur/article


This page dates from 2007, in this report broadcast in early 2011 on Arte: https://www.econologie.com/la-4ieme-revo ... -4370.html we see such a plant using salts as thermal buffer in operation in Spain (and probably made by Germans).

( This report is very good, to really see, it answers perfectly to the title of the subject "when you want, you can" ... Debate here: https://www.econologie.com/forums/la-quatrie ... 11253.html )

180 GWh produced for 50 MW of installed power gives an annual load factor of 41%!

Load factor = energy produced / (installed power * 8740)

8740 is the number of hours in a year. If 100% is because the plant always works at nominal power (never the case even for nuclear power where we are in the 70 to 80% range)

In terms of load factor, we therefore manage to make 1/2 of nuclear with solar be very good and probably the best load factor of renewable energies ... (which should close the valve of some ...)
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by the middle » 21/11/11, 09:55

In terms of load factor, we therefore manage to make 1/2 of nuclear with solar be very good and probably the best load factor of renewable energies ... (which should close the valve of some ...)

Exactly!
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by Remundo » 21/11/11, 11:32

Christophe wrote:
lejustemilieu wrote:And there you go ...
You have to look a little, and add a little money, then the solutions arrive :D
http://www.rtflash.fr/stocker-l-energie ... ur/article


This page dates from 2007, in this report broadcast in early 2011 on Arte: https://www.econologie.com/la-4ieme-revo ... -4370.html we see such a plant using salts as thermal buffer in operation in Spain (and probably made by Germans).

( This report is very good, to really see, it answers perfectly to the title of the subject "when you want, you can" ... Debate here: https://www.econologie.com/forums/la-quatrie ... 11253.html )

180 GWh produced for 50 MW of installed power gives an annual load factor of 41%!

Yes it is very good indeed : Idea: Wind power, for example, is 25%.
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by dedeleco » 21/11/11, 11:44

Sure I can do it, especially in the deserts and we can store without salts underground, for much less, very hot heat, as volcanoes have been doing for billions of years !!
In particular in the lavas of ancient volcanoes !!


But to put in everyone's mind that the earth is a good storage medium almost free of charge, and insulating over 3m to 6m in one year of heat diffusion, (so with almost more losses for fairly large installations of the type above) I do not know what to do, despite the demonstration that has worked since 2007 for summer heating for winter at www.dlsc.ca
!!!
Compared to nuclear, even EPR, still far from being perfectly safe, there are no technological unknowns, no risks, no lies !!

Sensor surface area required for a gigaWatt equivalent of a peak solar power plant at 1KW / m2: one million m2 or 1Km2, or in fact 4Km2 max with underground storage and absence of sun at night in a desert, of the same order of magnitude land immobilized by nuclear power plants or ITER !!

In my opinion, with deep underground storage on ancient volcanoes, (no geological risks then), after industrialization, this geothermal solar with 100% load factor and adjustable according to needs also at 100%, will be much cheaper than nuclear (not the case of nuclear, even with the EPR, which does not succeed, without a major risk of Chernobyl in France) !!!

Little calculation to do, what volume and dimensions of soil are needed to store over a day or a week ???
In fact there will be no losses, as for volcanoes !!!

The oil-producing countries of the deserts should achieve it, to maintain their dominance in energy for the rest of the world, for the post-oil period !!!
4Km2 of desert, by nuclear or oil plant, to replace, is not much !!
In addition, they will avoid the CO2 which will transform these deserts into an untenable furnace (+ 10 ° C more).
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by Remundo » 21/11/11, 18:48

Hi Dédé, I had made calculations on the thermal storage at very high temperature in the sand of the deserts accessible in the PHRSD FAQ,
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