Construct the lasting world - Science and Life

Clean energy

By Denis Delbecq • May 21st, 2008 in 16:33 · Category: Video

Engines with Hydrogen, energy of fusion, wind, solar, geothermics What future for these energy sources? Are they besides clean really? Experts' words. Length: 69’. © Science Frontières.

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8 comments»

  1. Emmanuel Poirier d' Orsay on déja more than 800 power stations in functioning (0,15 - 2 MW) and more than 50 delivering in 2006/2007; they work in techno MCFC especially either PEMFC or PAFC from gases of digestion of the plants of treatment of wastewaters or of agroindustrial installations or of natural gas and with 50 % outputs or more therefore much better than thermal power stations. There is also as the range of generators éléctriques from 0,1 to 150 kW for applications in telecoms or computer UPS more than 5 000 units in functioning and more than 1500 delivered in 2006/2007; they work in techno PEMFC especially or SOFC from hydrogen or gas nat or fuel oil with an integrated reforming.
    In conclusion it would be necessary to speak more of applications generation of electricity, small or big, piles with fuel.

  2. Pierre on Nag on reacteurs nucleaires of 4eme generation surgenerateurs????? Let us use reacteurs nucleaires has well-blended salts working in the thorium. The Indian have deja of reacteurs of small power and they will pass has the commercial echelle before 2020 The (fissile) uranium 235 that nature is used for the moment represente only 0,7 % uraniums in the rest is some uranium 238 (depleted uranium or natural uranium) which is not fissile but that is fecund as the thorium 232. Reserves known of thorium is 4 times as big as those of uranium. To tell the truth, there is more energie contained in the thorium than in the uranium, the petrole, the coal and the gas reunis! This fecund materiaux can etre transform into fissile materiaux by reacteurs has quick neutrons, known as surgenerateurs. Another 20 research years and this technology which exists deja has baby echelle will be able etre utilisee to produce big quantites of electricite. Besides, what goes out of RSF is inappropriate has the production of weaponry and the produced dechets is much lesser because the use of the fuel nucleaire is complete. Especially the biggest part of the dechets of long duree of life that actinides under 18 is called (curium, an ammericium) is detruits: therefore dechets is radioactive less for a long time. It is too good!!! They have meme of reserves of thorium in Brittany!

  3. Dubief on The nuclear reactors of 4th generation: a phantasm for energy

    Reactors which will begin being available for a commercial usage only in 2040 or 2050 and with a very slow rhythm. Reactors which cannot be at the same time fast-breeder reactors and consumers of some waste (it is necessary to choose) and that need plutonium from 10 to 12 tons to start.

    For reactors in thorium, problem is the same: a lot of uranium or plutonium to start and a technology which will not be in the point (commercial level) before 30 or 40 years. By then, the uranium will have crossed its peak of production (read the report on the uranium, link here: Reports on fossil energies and fissile) and the nuclear technology in aura took a good blow in the wing.

  4. Greg on démago Bio-Markéting and Politically correcet Green Walk thoroughly.

  5. kamal morocco on thermonucleaire fusion is an important source of energie, but ca ask for a lot of money according to my knowledge the energie renouvelabe of time and the hydrogene h2 who constitutes any chemical elements and it is possible to stock him in the metraux where they can extrire easily with a simple electrique glow

  6. abderrahim Moroccan on oxygéne who stays on earth. and I think that science was born for guerrire and not to kill, and jéspere that current technologies will stop of detruire our mere planéte, for the future generation.

  7. souria on lobies of sharks).
    If it is l’ economic exchange which predominates then let us change this system, for a softer, more equitable system, let us stop the profiteers, the pollutants and let us make sure that l’ balance on the planet is preserved, as well as biodiversity l’ one cannot exist without l’ other one.
    Everything is still possible.

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