How It Works? – Solar
In order to heat water using solar energy, a collector, often
fastened to a roof or a wall facing the sun, heats working fluid that is
either pumped (active system) or driven by natural convection (passive
system) through it.
The collector could be made of a simple glass-topped insulated box
with a flat solar absorber made of sheet metal, attached to copper heat
exchanger pipes and dark-colored, or a set of metal tubes surrounded by
an evacuated (near vacuum) glass cylinder. In industrial cases a
parabolic mirror can concentrate sunlight on the tube. Heat is stored in
a hot water storage tank. The volume of this tank needs to be larger
with solar heating systems in order to allow for bad weather, and
because the optimum final temperature for the solar
collector[clarification needed] is lower than a typical immersion or
combustion heater. The heat transfer fluid (HTF) for the absorber may be
the hot water from the tank, but more commonly (at least in active
systems) is a separate loop of fluid containing anti-freeze and a
corrosion inhibitor which delivers heat to the tank through a heat
exchanger (commonly a coil of copper heat exchanger tubing within the
tank).
Copper is an important component in solar thermal heating and cooling
systems because of its high heat conductivity, resistance to
atmospheric and water corrosion, sealing and joining by soldering, and
mechanical strength. Copper is used both in receivers and primary
circuits (pipes and heat exchangers for water tanks).
Because you’re using the sun’s energy to heat your water, less
non-renewable energy sources are being used. This works for you in more
ways than one:
- The amount of greenhouse emissions you produce could be reduced.
Why? Because heating water is the largest single source of greenhouse
gas emissions from the average property (23% of household emissions).
- The amount of money you spend on energy may be reduced.
Why? Because where a five star energy efficient gas hot water system
saves you 15% on running costs, a gas-boosted solar hot water system can
double this. And if you’re upgrading from a traditional electric hot
water system you could save even more.
- The government could rebate some of your costs.
Why? Because there are government incentives in place which reward
eligible customers for choosing renewable energy sources for their
property’s energy use.
For more information on how you can save money on your utilities, or for a FREE in-home consultation please
contact us here.
We are available 24 Hours a Day 7 Days a Week Give us a call at 407-381-7900
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