Solar Energy

Saturday, February 9, 2008

SOLAR PANELS
In our previous post, we introduced our topic and made some brief explanations. Before we go into anything more detailed, we would like to talk about solar panels in this post. To be able to harness energy from the sun and use it, we first need something which can convert the light and heat energy into electricity-solar panels. Here is a picture of a solar panel:

Source: FreeFoto.com

Now, looking at the picture, I am sure many of you would be wondering how this panel would actually help in converting the energy from the sun into electricity for our use. So, how exactly does this work?

Pure silicon is the basic element of solar panels. This is because when silicon is stripped of all impurities, it makes an ideal neutral platform for the tansmission of electrons. Also known as photovoltaic panels, the silicon within them are formed into very thin wafers. Silicon in its stable structure has no charge therefore it is combined with other elements such as phosphorus, therefore resulting in a negatively charged silicon/phosphorus plate. When the sun rays hit the panels, the photons from the sun bombard the silicon/phosphorus atoms, causing the electrons to be broken off. These electrons are caught by the small wires and when connected in a circuit, will generate electricity. An inverter is then needed to convert the Direct Current electricity to Alternating Current for use in homes.

Before i end off this post, the following picture shows solar panels being installed on rooftops as a source of electricity for households:

Source: http://kohm.org/blog/?p=1758

Informations from the above are adapted from:

http://ezinearticles.com/?How-Does-Solar-Power-Work?&id=68282

http://www.wisegeek.com/how-do-solar-panels-work.htm

-Althea.

the sun left its mark!