17.2 Vitosol 200-T vacuum tube collectors, type SP2A
Observe the information on securing collectors on page 111.
For installation on balconies a special balcony module sized 1.26 m
2
is available.
A
A
Wall or balcony
The yield can be optimised by rotating the individual tubes through
25°.
Establish the hydraulic connection from below.
Information regarding design and operation
18.1 Sizing the solar thermal system
All sizing recommended below relates to German climatic conditions
and common utilisation profiles in the home. These profiles are stored
in the Viessmann "ESOP" calculation program and correspond to the
suggestions of VDI 6002-1 for apartment buildings.
Under these prerequisites, a design output of 600 W/m
2
is assumed
for all heat exchangers. The maximum yield of a solar thermal system
is assumed to be approx. 4 kWh/(m
2
d). This value fluctuates depend-
ing on the product and location. To enable this heat yield to be trans-
ferred to the cylinder system, a ratio of approx. 50 l cylinder volume
per m
2
aperture area is determined for all conventional designs. This
ratio may change in relation to the system (subject to solar coverage
and utilisation profiles). In this case, a system simulation is unavoida-
ble.
Irrespective of the capacity, in relation to the transferable output, only
a limited number of collectors can be connected to the various cylin-
ders.
The transfer rate of the internal indirect coils depends on the temper-
ature differential between the collector and cylinder temperatures.
6
8
10
12
14
16
18
20
0
5 10 15 20 25 30 35 40 45 50
Temperature differential in K
Collector area in m²
A
B
C D
Flow rate 25 l/(hm
2
)
A
Vitocell 100-B, 300 l
Surface area, indirect coil 1.5 m
2
B
Vitocell-M/Vitocell-E, 750 l
Surface area, indirect coil 1.8 m
2
C
Vitocell 100-B, 500 l
Surface area, indirect coil 1.9 m
2
D
Vitocell-M/Vitocell-E, 950 l
Surface area, indirect coil 2.1 m
2
Design information for wall installation
(cont.)
136
VIESMANN
VITOSOL
18
5822 440 GB