4.1 Product description
B
C
D
E
A
A
Copper double pipe heat exchanger
B
Condenser
C
Absorber
D
Heat pipe
E
Evacuated glass tube
The Vitosol 300-TM vacuum tube collector, type SP3C, is available
in the following versions:
■ 1.26 m
2
with 10 vacuum tubes
■ 1.51 m
2
with 12 vacuum tubes
■ 3.03 m
2
with 24 vacuum tubes
The Vitosol 300-TM, type SP3C, can be installed on pitched roofs,
flat roofs, on walls, or as a freestanding collector.
On pitched roofs the collectors may be positioned in line (vacuum
tubes at right angles to the roof ridge) or across (vacuum tubes par-
allel to the roof ridge).
An absorber with highly selective coating is incorporated inside each
vacuum tube. The absorber ensures high absorption of insolation
and low emissions of thermal radiation.
A heat pipe filled with an evaporation liquid is fitted to the absorber.
The heat pipe is connected to the condenser. The condenser is fitted
inside a Duotec copper double pipe heat exchanger.
This involves a so-called "dry connection", i.e. the vacuum tubes can
be rotated or replaced even when the installation is filled and under
pressure.
The heat is transferred from the absorber to the heat pipe. This cau-
ses the liquid to evaporate. The steam rises into the condenser. The
heat is transferred to the passing heat transfer medium by the dou-
ble pipe heat exchanger containing the condenser. This causes the
steam to condense. The condensate returns back down into the heat
pipe and the process repeats.
The inclination angle to horizontal must be greater than zero to guar-
antee circulation of the evaporator liquid in the heat exchanger.
The vacuum tubes can be rotated to precisely align the absorber
with the sun. The vacuum tubes can be rotated through 25° without
casting shade on the absorber surface.
Up to 15 m
2
absorber area can be connected to form one collector
array. For this purpose, the standard delivery includes flexible con-
nection pipes with O-rings. The connection pipes are cladded with a
thermally insulated covering.
A connection set with locking ring fittings enables the collector array
to be readily connected to the solar circuit pipework. The collector
temperature sensor is installed in a sensor retainer on the flow pipe
in the header casing of the collector.
The collectors can also be used in coastal regions.
Benefits
■ Highly efficient vacuum tube collector based on the heat pipe prin-
ciple, with ThermProtect automatic temperature-dependent shut-
down for high operational reliability
■ Universal application through vertical or horizontal installation in
any location, either on rooftops or walls, or for freestanding instal-
lation
■ Narrow balcony module (1.26 m
2
absorber area) for installation on
balcony railings or walls
■ The absorber surface with highly selective coating integrated into
the vacuum tubes is not susceptible to contamination
■ Efficient heat transfer through fully encapsulated condensers and
Duotec copper double pipe heat exchanger
■ Vacuum tubes can be rotated for optimum alignment with the sun,
thereby maximising the energy utilisation
■ Dry connection, meaning vacuum tubes can be inserted or
changed while the system is full
■ Highly effective thermal insulation for minimised heat losses from
the header casing
■ Easy installation through the Viessmann assembly and connection
systems
Vitosol 300-TM, type SP3C
18
VIESMANN
VITOSOL
4
5822 440 GB
