5.1 Product description
C
D
E
F
A
B
A
Aluminium casing
B
Heat exchanger
C
Condenser
D
Absorber
E
Heat pipe
F
Evacuated glass tube
The Vitosol 200-TM vacuum tube collector, type SPEA, is available
in the following versions:
■ 1.63 m
2
with 9 vacuum tubes
■ 3.26 m
2
with 18 vacuum tubes
The Vitosol 200-TM, type SPEA, can be installed on pitched roofs,
flat roofs, 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).
A metal absorber with highly selective coating is incorporated inside
each vacuum tube. The metal 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 copper sensor well heat exchanger.
This involves a so-called "dry connection", i.e. the vacuum tubes can
be replaced even when the system 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. Heat
is transferred by the heat exchanger with its copper manifold, which
contains the condenser, to the heat transfer medium as it flows past.
This causes the steam to condense. The condensate returns back
down into the heat pipe and the process repeats.
The angle of inclination must be greater than zero to guarantee cir-
culation 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 45° with
reduced shade on the absorber surface.
Up to 20 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.
A connection set with locking ring fittings enables the collector array
to be readily connected to the solar circuit pipework. The connection
set is available with or without sensor well. The collector temperature
sensor is fitted in the connection set sensor well.
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
■ 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
heat exchanger
■ Vacuum tubes can be rotated for optimum alignment with the sun,
thereby maximising the energy utilisation
■ Dry connection, meaning 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
Delivered condition
Packed in separate boxes:
■ 9 vacuum tubes per packing unit
■ Header casing with mounting rails
Vitosol 200-TM, type SPEA
VITOSOL
VIESMANN
21
5822 440 GB
5
