Solar Energy

What is solar energy?

Solar energy is light or heat (radiant energy) that comes

from the sun.

Although solar energy is the most abundant energy source

available, harnessing the energy effectively can be

problematic.

In 2008, solar only provided 0.02% of the world’s energy.

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Solar or photovoltaic cells are made using silicon which is heated and melted at high temperatures and then formed into wafers.

Solar Cells

When sunlight hits the solar panel, electrons are loosened and solar energy is converted into electrical energy.

Solar Power

Solar ThermalSolar thermal plants use the

sun’s rays to heat liquid, which then is used to heat the water

and produce steam.

The steam can then be used to drive a turbine and generate

electricity.

The sun has traditionally been and is still used for heating,

cooking, etc.

Pros

the sun is free!

storage systems can be used to collect the sun’s energy

manufacturing solar cells produces up to 300 times less toxic emissions that coal power plants

pollution-free when operating

Cons

solar cells take up large amounts of space

solar cells are difficult and expensive to make

the sun does not deliver that much energy to any one place for too long and is not always out

requires lead and mercury in the manufacturing