What you've always wanted to know
about solar thermal energy...
Due to impending fossil fuel shortages, price
increases, and combustion pollution, there is a fast-growing interest
in thermal energy. In Central Europe, a large part of household
energy is used for heating (25%) and hot water (10%).
In Germany, solar thermal systems are installed in 4% of all one-family
homes, saving approximately 200 million liters of fuel oil annually.
A solar thermal system for
utility water heating presents itself as a good, low-cost start.
In 2001 alone, over 80,000 solar water heating systems were installed
in Germany, while a continuing trend toward larger equipment that
supports space heating systems is detected (20,000 units in 2001).
The high-vacuum collectors
made by Sunda Solar Technology were developed by DASA and designed
particularly for use in our cold winter climate.
Advantages of vacuum tube collectors over
flat plate collectors:
The high vacuum in the glass tube provides
the collector with a highly efficient heat insulation. Even under
adverse ambient conditions, such as low outdoor temperature and
wind, no heat is lost through heat conduction or convection.
There is no better thermal insulation than the
high vacuum of
10-5 bar that Sunda Solar Technology uses
for its collectors (every good Thermos flask confirms this statement!).
This is a great advantage especially during the cold months of the
+ Excellent thermal insulation guarantees
+ Also, optimally suited for traditional heating system
Simultaneously, due to the collector
being located inside the evacuated glass tube, the high vacuum protects
the absorber surface's selective coating from moisture, steaming
up, soiling, corrosion and degradation during the collector's entire
life. The glass tube exterior is perfectly smooth and self-cleaning.
+ Constant efficiency
Low response threshold allows heat
to build up in the collector, even in overcast or cloudy conditions
with incoming solar radiation between 160 W/qm and 200 W/qm.
+ Collector efficiency in bad weather, and ideal for diffuse light
No lifting equipment or additional
helper is required for installing any type of collector, as frame,
collector and vacuum tubes are installed separately on the roof
or wall of the building. The individual components fit through any
small attic window. We carry the proper installation kit suitable
for any roof type.
+ Critical installation time and cost
+ Quick and easy replacement of individual collector components
+ Easy system upgrading
The vacuum collector's high temperature
level also allows solar cooling technology applications, and its
special layout eliminates Legionella bacteria.
+ Safety factor for users
+ Expanded application range, large-scale systems
During installation, the absorber surfaces
of the individual tubes can be optimally oriented according to incoming
solar radiation, roof pitch, building facades, and variation from
+ High planning and installation flexibility
for maximum use of
+ Increased efficiency
Sunda Solar Technology offers the correct
type of collector for any structural situation. Seido 2 can be mounted
at an arbitrary angle, resulting in a variety of architectonic possibilities.
Collectors are inconspicuous from below; the
support structure is not visible from above
Transparent, and aesthetically pleasing arrangement
over greater areas
Roof-top installation (over existing roofing
tiles) eliminates roofing damage.
Good visibility makes it the "solar energy user's pride".