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SOLAR WATER HEATERS
Solar water heating
systems comprise
several innovations
and mature
renewable energy
technologies that
have been well
established for
many decades
around the globe.
Solar water heating systems use solar panels, called collectors, fitted to
your roof. These collect heat from the sun and use it to heat up water
which is stored in a hot water cylinder. A boiler or immersion heater
can be used as a back-up to heat the water further to reach the
temperature you want. Larger solar panels can also be arranged to
provide some contribution to heating your home as well. However, the
amount of heat provided is generally very small and it is not normally
considered feasible.
Two principles govern solar
thermal collectors. First,
any hot object eventually
loses its heat back to the
environment. The efficiency
of a solar thermal collector
is directly related to heat
loss, mainly from
convection and radiation.
Thermal insulation is used
to slow down heat loss from
a hot object to its
environment.
The proper installation of solar water heaters depends on many
factors. These factors include solar resource, climate, local building
code requirements, and safety issues. Therefore, it is best to have a
qualified solar thermal systems contractors install the system.
Solar water heaters offer
long-term benefits that go
beyond simple economics.
In addition to having free
hot water after the system
has paid for itself in
reduced utility bills, you
will protect yourself from
future fuel shortages and
price increases. Solar
heaters provide additional
supplies of hot water for
the entire family.
Solar water heaters do
not pollute. By investing
in one, you will be
avoiding carbon dioxide,
nitrogen oxides, sulfur
dioxide, and the other air
pollution and wastes
created when your utility
generates power or you
burn fuel to heat your
household water. When a
solar water heater
replaces an electric water
heater, the electricity
displaced over 20 years
represents more than 50
tons of avoided carbon
dioxide emissions alone.
Solar water heater

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Solar water heater

  • 2. Solar water heating systems comprise several innovations and mature renewable energy technologies that have been well established for many decades around the globe.
  • 3. Solar water heating systems use solar panels, called collectors, fitted to your roof. These collect heat from the sun and use it to heat up water which is stored in a hot water cylinder. A boiler or immersion heater can be used as a back-up to heat the water further to reach the temperature you want. Larger solar panels can also be arranged to provide some contribution to heating your home as well. However, the amount of heat provided is generally very small and it is not normally considered feasible.
  • 4. Two principles govern solar thermal collectors. First, any hot object eventually loses its heat back to the environment. The efficiency of a solar thermal collector is directly related to heat loss, mainly from convection and radiation. Thermal insulation is used to slow down heat loss from a hot object to its environment.
  • 5. The proper installation of solar water heaters depends on many factors. These factors include solar resource, climate, local building code requirements, and safety issues. Therefore, it is best to have a qualified solar thermal systems contractors install the system.
  • 6. Solar water heaters offer long-term benefits that go beyond simple economics. In addition to having free hot water after the system has paid for itself in reduced utility bills, you will protect yourself from future fuel shortages and price increases. Solar heaters provide additional supplies of hot water for the entire family.
  • 7. Solar water heaters do not pollute. By investing in one, you will be avoiding carbon dioxide, nitrogen oxides, sulfur dioxide, and the other air pollution and wastes created when your utility generates power or you burn fuel to heat your household water. When a solar water heater replaces an electric water heater, the electricity displaced over 20 years represents more than 50 tons of avoided carbon dioxide emissions alone.