Photovoltaics

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Solar Cells/Photovoltaics: What is the density of SiC/PEG (polyethylene glycole) slurry?

(And its price if u can possible get it?)

Anybody know?

Thank you

There are two very different types of solar panels. The first is the one that is in the news quite a bit. These are the photovoltaic panels. They convert sunlight to electricity and were invented around 1950 if I recall correctly. Current developments have brought the panels to an efficiency level of around 40% with hopes to get it to around 60%, but what you will buy, on the street, will be around 14%. This might be compared with photosynthesis which is around 6%.

The other types of panel are the solar thermal panels. These have been around to heat water for at least 100 years. They capture the sun's heat energy. As heat is often a wasted bi-product the efficiency of these units can be from 60 to 80%. The units tend to be cheaper and payback far shorter for solar photovoltaic panels. The latest development is vacuum tube collectors that are more effective on cloudy days and in cold environments. Some use phase change materials.

But as solar thermal panels tend to circulate water as a heat transfer medium there can be an issue with freezing. One of the several solutions to this is a system that includes an antifreeze in the water. The required density of the mixture will depend upon the burst protection level that is desired and the type of material will dictate the freeze protection required. Please see the articles below.

Third-Generation Photovoltaics


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