Archive for the ‘Energy’ Category

Solar cells in Colors

May 15, 2010

A dream in the green energy  has been developed. New transparent solar cells in colors . They can capture the indirect light not only direct sun rays.  With an efficiency of 12% and a low cost of  $2.1/W.

Their developers based in Jerusalem hope to improve this figures  almost to 20% and $ 0.98/W  for the next couple of years.  It is a fifth of the actual cost for the usual cells wich uses high percentage of silicium and not use fluorescent nanoparticles.

The possibilities for green architecture are open to imagination.

Nuclear Fusion

May 12, 2010

Why is this way of energy so thoroughly pursued by scientific community?

Because the energy produced by the union of two primary light nuclei  into a heavier one is very high and the residues have low radioactivity.
Not all fusion reactions produce the same energy, the most common one is Deuterium + Tritium = Helium + neutron that produces 17,6 MeV , but even the easiest to produce is very hard to achieve.

There are many engineers , and physicists working hard in finding the way to produce fusion as a real source of energy.

One of the methods in which the scientist  believe harder  is Inertial Confinement Fusion
basically it works making to coincide numerous high power lasers in a dense metal, hohlraum , that produces X-rays of very high energy making the  nuclei  reach incredible high temperatures boosting the fusion probabilit

The premises in wich it is being proved this kind of fusion are  NIF (National Ignition Facility) in US and  LMJ (Laser Mega Joule) in France, with the same energy than NIF, but 240  laser beams instead  192, what gives  more flexibility (and complexity) to the installation.

 Some NIF  images 

Today North Korean newspapers published they succeed in fusion using this method. The coincidence with the birthday of the deceased  founder of  korea  festivity, the militar interest in nuclear weapons of the country and the luck of evidences makes the information not very trustful.