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Solar hot
water heaters are proven and ready for the market. With
energy prices rising and no sign of decline, we must
increase awareness for alternative energy. Solar thermal
technology has improved and is as efficient as natural gas
by 70-
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80% efficiently equivalent. The development of
evacuated tubes have for the most proven performance
high temperature collectors. As long there is UV ray
it absorb the sun radiation and keeps the heat
between the vacuum layers, therefore sustain the
temperature to keep increasing as long as there is
sunshine.
The
hesitance of acceptance were that it been treated
like the solar photovoltaics panel that require more
area for large collecting of sun radiations. Solar
thermal technology by evacuated tubes have been
accepted in large scale by
Europe,
Asia,
and the
Caribbean.
Unfortunately, in North America Canada have yet to
accept this into our daily lives and we have the
greatest global warming effects the most as the
Northern have temperatures warming than usual as
iceberg are melting and wildlife affected. The
replacement of just hot water supply do not seems to
stimulate interest
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the great as the upfront cost of an solar water
heaters from $3800.00. But in long term actual
savings are substantially high to the investments.
In
Europe,
realization of savings are as high as $2500.00/year.
In careful study of utility bills cost are incurred
by adding delivery and customer charges to avoid
actual cost of gas each year.
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With
introduction of space heating generated by solar collector
seems to be more of trend as substantial amount goes to
space heating. Power generated from the sun have enough
energy to heat a home. Here is the calculation, we received
approximately 3.93kwh/m2/day in Toronto,
Ontario and by placing 2 collectors panels
area 8.4m2 will generate 33.01kwh/m2/day= 112.636BTUs which
is more than sufficient for an average home space.
Solar thermal
technology is the answer to hot water usage and space
heating. But the common question are will it generate enough
energy to heat during the winter days when sunshine is the
most least. The second question will be that it will consume
electric energy. The winter days are getting more sunshine
days than usual and using the statistics the number of days
with sunshine are almost 60% to the cloudy days. Now one
must realized that global warming have a lot to do with
this, and generally speaking sunshine days starts in March
to late November and thus leaving Dec-Feb which basically
only 90days period ,this leaving 54 days with cloudy period,
Now one must realized that by calculation the
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sunshine days are way greater already to cloudy
days. The back up electric heat does consume energy
but as compared to using natural gas equivalent it
is much cheaper. Lets say a furnace is to heat a
house space energy as to a 1500watts (1.5kw) to heat
a a 300 liter storage tank that can heat a house
space with 16.5kw which is 56.320BTUs almost common
to average furnace.
The
back up heat element does not boil the water but
sustain the temperature of water and with no burnt
residue.
The awareness and habitual usage will be the answer
to using solar thermal energy as we waste lots of
energy rather than conserve it as the mind set it
was inexpensive those days.
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Time
has come that awareness of energy are a main concern
to our lives and being able to seek alternative as
long term will be the thing to see in the near
future. The last main concern is the appeal look of
a storage tank in the roof ,and question like will
it damage the roof and weatherproofing. Well
generally speaking, it is more of a set mind rather
than structurielibility as roof are usually have a
life span of 15years top and the total weight of the
tanks are equal to 5-6 people in the roof, which we
generally see roofers with more than that on the
roof. The appealing look again if that is a common
sight if your next door neighbor installed 4 dish
satellite dish.
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In
Japan the tank
in roof are as common as a dish ,so is
Greece which is
a growing rate of every 10 house 9
have the tank. So Basically it is a state of mind.
Solar Thermal
system comes in two types Direct and Indirect. Open system
which is known as direct, passive
because system are open loop and connect directly to
household hot water supply. This uses the thermo siphon
theory that hot water rises and cold water sinks and
therefore tanks are always above collectors to received the
hot water. Direct usually are inexpensive, reliable little
or no maintenance at all. Requires no moving parts and to
suit sub zero climate additional anti freeze protections are
required.
The indirect
system are also known as active closed loop which is
suitable for sub zero climates and uses anti freeze heat
transfer liquid (glycol) to a storage tank inside the home.
All the evacuated tubes operate with heat pipe inside tube
and transfer heat to manifold and then to storage tank heat
exchanger. This system is more expensive as it requires more
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parts. Each applications no matter how be design
serve the performance and depends on individual
expectations. Will all this be beneficial to user
,it will definitely does saving in the long terms
and once proper installed system do not require any
maintenance and system usually outlive the roof life
span. Once getting used to it ,it will provide just
like any hot water supply could it be gas or
electric.
Understanding
that all heat generated are by the high temperature
evacuated tube which is build with double layer
vacuum tube that absorb the UV and retained heat
inside the tube to sustain the heat exchanger. The
creation of the tube do not allow snow to be retain
on tubes as the temperature slight changes the snow
slips of the tubes with sunshine hits the tubes.
Wholesale
and supplies of solar thermal parts and heating.
Solar collector panels ,solar part and accessories,
wall radiators and floor heating parts. Complete
supplies of all heating application service and
estimate on home installations. Provide after sales
service calls and consultation to heating solutions.
Will do commercial project where involve large scale
hot water demand and swimming pools applications.
The collectors are connected in series and using a
closed loop to a heat exchanger (stainless steel) as
pools have chlorine chemicals that are erosive to
copper. Some system have a bypass to be able to use
that during winter where pool are not in use to
divert to a storage tank for radiant heat since
panels are up already.
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