What
is solar power?
Solar power is energy which
comes from the sun. This energy is very powerful and hits the earth
regardless of whether or not we take advantage of it. Even the tiny
percentage of sunlight that touches the earth is plenty to meet the
energy and power needs of the entire human population more than 8,500
times over.
The only concern is learning how to collect this energy efficiently.
Today there are many different technologies which exist to achieve this
goal. Due to concerns of the availability of traditional energy sources,
many people today are interested in further developing renewable energy
technologies, such as solar devices.
For this reason it is sensible to expect continual improvement of existing
solar technology and the invention of new solar power devices over the
next few decades.
What is solar power technology doing to harness the energy
from the sun?
Solar power technology captures energy from the sun in a variety of
ways.
Here are some examples:
•Solar cells- Also known as photoelectric or photovoltaic cells,
these are the most common devices that turn sunlight into electricity.
Solar cells are combined into modules of which solar panels are comprised.
•Solar water heaters- Basically, heat from the sun is used to
heat water through glass panels which are installed on roofs, known
as solar collectors. Solar collectors deal with heat from the sun (solar
thermal energy) as opposed to light.
•Solar furnaces: Solar furnaces use many strategically placed
reflective surfaces, like mirrors, in order to concentrate all of the
sunlight into a single point. This small space of concentrated energy
creates an extreme amount of heat which can be used for making electricity,
melting steel, or creating hydrogen fuel.
What is solar power offering that makes it such an appealing
energy source?
•Solar energy is a completely free and inexhaustible fuel source
•No fuel, waste, or pollution is expelled in its usage.
•In remote areas, or small villages, solar power can be the saving
grace. Sometimes it is the only realistic way to provide energy to a
place that is not capable of drawing energy from other sources.
•It can be used for low-power purposes as well as larger ones-
from battery chargers, hand-held calculators, and solar powered garden
lights to air conditioning, cars, and satellites.
•Sunlight is provided regardless of whether we use it or not.
There is no need to process sunlight beyond the amount which a solar
cell or solar collector is capable of doing (unlike fossil fuels or
even other alternative energy sources, such as biomass.)