Sun in our home
Solar concentrate makers
One of the most perspective alternatives for reducing the price and increasing the efficiency of the systems for utilizing solar energy is use of concentrated solar energy. In this way , the area (and the price) of the expensive photo transforming materials is reduced a lot. Because of the fact , that they are with a small area , can be used photo elements that are more expensive but more effective. It is also possible liquid or steam to be heated up to a very expensive temperature and in this way an effective production of energy will be provided. Once concentrated, solar energy can be transported to the relevant site for direct lighting or heating.
Parabolic concentrate makers are the most efficient ones, but they are expensive and heavy. It is very difficult to produce mirrors with a different size of batch production.
In spite of that the Company Solar energy System installs industrially produced concentrating systems with parabolic mirrors.
Solar cells on basis of the nanotechnologies have been developed. Nanomaterial is shaped as a crystal, that is known as nanokrystal. They contain between 100 and 100 000 atoms. They are about 75000 times smaller that the humans hair diameter…They are produced of cheaper materials and their flexibility and easy construction are a key factor for creating new markets for solar energy.
The technology “Tandem cell”
For feeding up the perspective “hydrogen cells” huge amounts of hydrogen is required.
So far the only way for it to be obtained was the traditional electrolysis.Two separate systems are required-expensive photovoltaic panels and separately a device for electrolyses(expensive because of the used catalysts-platinum and palladium).
But the British company “Hydrogen solar” patented “photoelectrohemical” method , which is much more efficient. The technology is called “Tandem cell”. In it for elaboration of hydrogen is used a package “type sandwich” by special solar panels.
The first Layer is half transparent(nanokrystal layer of metal oxide).It swallows up ultraviolet and blue ryes.
After that a thin layer of water follows up.
The second layer swallows the rest of the spectrum (green, red and infrared ryes)
Together they generate electric potential capable of decomposing water between them to the components, comprising it-hydrogen and oxygen. The two panel are connected with conductors in a special scheme.
The authors estimate the coefficient of useful action of the process to be 8%.
The experimental system , operating in Hydrogen Solar, produces some kilos of hydrogen for 24 hours.
When The coefficient of useful action of the process is improved up to 10% and the roof of the garage is covered with such panels , then the annual hydrogen gain will be enough for an annual car run with: “hydrogen fuel cells” for 17000 km!!!
Studies and technical improvements of the technology follow to be implemented.