Solar energy is the cleanest and most
inexhaustible of all known energy sources. Solar radiation
is the heat, light and other radiation that is emitted from
the sun. Solar radiation contains huge amounts of energy and
is responsible for almost all the natural processes on
earth. The suns energy, although plentiful, has been hard to
directly harness until recently.
Solar Energy can be classified into two categories, Thermal
and Light. Photo-voltaic cells (PV) use semiconductor-based
technology to convert light energy directly into an electric
current that can either be used immediately, or stored in a
battery, for later use. PV panels are now becoming widely
used as they are very versatile, and can be easily mounted
on buildings and other structures. They can provide a clean,
renewable energy source which can supplement and thus
minimize the use of mains electricity supply. In regions
without main electricity supply such as remote communities,
emergency phones etc, PV energy can provide a reliable
supply of electricity. The disadvantage of PV panels is
their high cost and relatively low energy conversion rate
(only 13-15%). Thermal solar on the other hand has average
efficiency levels 4-5 times that of PV, and is therefore
much cheaper per unit of energy produced.
Thermal energy can be
used to passively heat buildings through the use of certain
building materials and architectural design, or used
directly to heat water for household use. In many regions,
solar water heaters
are now a viable supplement or alternative to electric or
gas hot water production.
Thermal energy obtained from the sun can be
used for a number of applications including producing hot
water, space heating and even cooling via use of absorption
chilling technology.
Using solar and other forms of renewable energy reduces
reliance on fossil fuels for energy production, thus
directly reducing CO2 emissions. CO2 emissions contribute to
global warming, an environmental issue which is now of great
concern. The average household can reduce
CO2 emissions by as
much as 20% by installing an
Apricus solar collector.
Flat plate thermal solar collectors have been
in use for several decades, but only in relatively small
numbers, particularly in Western countries. Evacuated tubes
have also been in use for more than 20 years, but have been
much more expensive than flat plate, and therefore only
chosen for high temperature applications or by those with
money.
In recent years the production volume of evacuated tubes has
exploded, resulting in greatly lower manufacturing and
material costs. The result is that evacuated tubes are now
similar in price to flat plate, but with the insulating
benefits of the evacuated tube, they are set to become the
default choice for thermal solar applications worldwide.
Click here to calculate how much energy an Apricus solar
collector could provide.
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