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We
supply and install:
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1x Evacuated solar tube panel to suite existing geyser size
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1x AC Low Wattage circulation pump
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1x P6 Advanced Solar Control Panel to regulate the AC
circulation pump
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1x Copper conversion fitting water jet
How it works:
When the sun comes up, the evacuated solar panel produces heat. The
circulation pump draws the water from your geyser, pushes it through
the evacuated solar tube panel heat exchanger and returns it back to
your geyser. The circulation pump will only switch on if the P6
Advanced Solar controller instructs it to do so. The instruction
will only happen if the P6 advanced controller detects that the
evacuated solar panel is 10'C hotter than the geyser water
temperature. This process is continued throughout the day, until the
sun goes down and the pump automatically switches off. The Geyser
thermostat temperature can be adjust using the P6 Advanced Control
Panel as well as the element run times as back up. This ensures that
on days where there is absolutely no UV rays around, you will still
have warm water. On average you can expect to save between R350 to
R600 per month, dending on your water usage demand. |
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We supply and install:
How it works:
Thermosiphon takes place When the sun comes up. The water in the
evacuated solar tube panel begins to circulate from the solar geyser
through the evacuated solar tube panel and back. The process is
continued throughout the day, until the sun goes down. We adjust
your geyser thermostat to 40'C so that on days where there is
absolutely no UV rays around, you will still have warm water. If
there is a power failure, thermosiphon effect will still take place,
which guarantees hot water irrespective of power failures.
Click here for
Thermosiphon
explained
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Advantages:
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No additional controllers needed
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Not affected by power cuts due to thermosiphon effect
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Guaranteed hot water all year round
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 The
evacuated tube collectors are an entirely different approach
to solar water heating. Instead of many water filled copper pipes,
these collectors use multiple vacuum filled glass tubes, each with a
tiny amount of antifreeze hermetically sealed within a small central
copper pipe. When heated by the sun, this antifreeze converts to
steam, rises to the top of the tube, transfers its heat to a
collector header, then condenses back into liquid and repeats the
process.
Because heat doesn't easily transfer through a vacuum, 92% of the
thermal energy hitting the absorber plate stays within the evacuated
tube and passes to the collector header. This is a huge advantage
because a standard flat plate collector radiates much of its
accumulated heat to the surrounding atmosphere like any other hot
object.
The evacuated tubes are also completely modular. Although rarely
necessary, one or more tubes can be removed and replaced without
affecting the other tubes in the array. There is no actual liquid
transferred from the evacuated tube to the collector header...just
heat. Evacuated tubes also start absorbing heat earlier in the day
than flat plates due to their convex design and the tiny amount of
antifreeze within the tube is freeze protected down to -50 degrees
below zero.
A radiant heating system is considered "open" any time the same hot
water is used for both heating and domestic hot water. This type of
system is very efficient because a single heat source (in this case,
solar with a fossil fuel back-up) provides for all the home's hot
water needs. In other words, the homeowner doesn't need two
completely separate systems, many times with overlapping mechanical
components, performing separate heating tasks.
Why use solar energy for domestic hot water and heating? Well,
besides the obvious advantages of using an unlimited, free (once
system components are paid back), renewable heat source, solar water
heaters interface well with radiantly heated floors because the
large thermal mass common to radiant systems provides an excellent
storage medium for the energy generated during the day. At night,
this stored thermal energy is slowly released into the living space
and a steady, even, and consistent comfort level is maintained.
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