We have a wide range
of water heaters with capacities varying from 150LPD to 10,000 LPD.
The applications include domestic water heating, commercial
establishments like hotels, hospitals, resorts, hostels etc.
Solar water heater produces hot water using energy
from sunlight. Hot water is used for different applications, domestic
as well as industrial. By using solar water heaters, we can save the
electricity and in turn save a lot of money.
HOW IT WORKS:
Water heater consists of mainly 2 parts. One is the collector and other
is Insulated tank. The cold water in the collector get heated up and
collected in the tank by thermo siphon principle. This circulation
continue till the water in the tank heated up to 60-80° centigrade.
The hot water in the tank remains hot for more than 24 hours.
Domestic Models : 150 LPD , 200LPD, 250 LPD &
300 LPD (Litres per Day)
Industrial Models : above 500 LPD upto 10,000LPD
SUNTREK SOLAR WATER HEATING SYSTEM
Evacuated tubes are the absorber of the
solar water heater. They absorb solar energy converting it into heat
for use in water heating. Evacuated tubes have already been used for
years in Germany, Canada, China and the UK. There are several types of
evacuated tubes in use in the solar industry. Solar collectors use the
most common "twin-glass tube". This type of tube is chosen for its
reliability, performance and low manufacturing cost.
Each evacuated tube
consists of two glass tubes made from extremely strong borosilicate
glass. The outer tube is transparent allowing light rays to pass
through with minimal reflection. The inner tube is coated with a special
selective coating (Al-N/Al) which features excellent solar radiation
absorption and minimal reflection properties. The top of the two tubes
are fused together and the air contained in the space between the two
layers of glass is pumped out while exposing the tube to high
temperatures. This "evacuation" of the gasses forms a vacuum, which is
an important factor in the performance of the evacuated tubes.
Why a vacuum? As you
would know if you have used a glass lined thermos flask, a vacuum is an
excellent insulator. This is important because once the evacuated tube
absorbs the radiation from the sun and converts it to heat, we don't
won't to loose it!! The vacuum helps to achieve this. The insulation
properties are so good that while the inside of the tube may be 150oC /
304oF , the outer tube is cold to touch. This means that evacuated
tube water heaters can perform well even in cold weather when flat
plate collectors perform poorly due to heat loss (during high
order to maintain the vacuum between the two glass layers, a barium
getter is used (the same as in television tubes). During manufacture of
the evacuated tube this getter is exposed to high temperatures which
cause the bottom of the evacuated tube to be coated with a pure layer
of barium. This barium layer actively absorbs any CO, CO2, N2, O2, H2O
and H2 out-gassed from the evacuated tube during storage and
operation, thus helping to maintaining the vacuum. The barium layer also
provides a clear visual indicator of the vacuum status. The silver
colored barium layer will turn white if the vacuum is ever lost. This
makes it easy to determine whether or not a tube is in good condition.
Evacuated tubes are aligned in parallel; the angle of mounting depends
upon the latitude of your location. In a North South orientation the
tubes can passively track heat from the sun all day. In an East West
orientation they can track the sun all year round.
The efficiency of a
evacuated water heater is dependent upon a number of factors, one
important one being the level of evacuated radiation (isolation) in
your region. To learn more about isolation and the average values for
& features of Vacuum tube
Full glass vacuum tube
is composed by the inner glass that is with the selective-absorbing
layer of the solar and the covering glass tube, and one terminal of the
inner glass tube, which is supported by the brace shelf with the
air-absorbing in the covering glass vacuum sealing terminal, is the
dome shape; while the ring type open terminal is formed by the melting
& and sealing between another terminal and the covering glass tube.