10
Design table
The accompanying table can be used
to estimate the required collector area
and storage tank size if the installa-
tion involves a standard domestic
application.
Use accepted design and calculation
methods to size the system precisely.
Attach a calculation to the start-up
report if the design configuration devi-
ates from the recommendations in-
cluded here. The warranty and guar-
antee becomes null and void in the
event of major sizing errors.
* The number of collectors required depends on the amount of hot water consumed or the heating requirements, roof slope
and direction and the amount of available solar radiation.
** The volume of the storage tank depends on the desired solar contribution and
the amount of heat required.
Use the following table to roughly estimate the size of the collector and
storage tank:
Design configuration and sizing
Collectors and heat storage tank
Sizing the solar storage tank
The solar collectors may only be op-
erated in conjunction with a properly
sized solar storage tank. The collector
will continually be subjected to inter-
nal overtemperature if the storage
tank is too small, which potentially
shortens the life of the collector.
Sizing the collector area
It is very important to size the collec-
tor area properly so that users may
enjoy many years of trouble-free op-
eration of the solar heating system.
The required collector area shall be
individually calculated for each instal-
lation taking into consideration the
amount of heat required, the slope of
the roof and its direction, as well as
the available solar radiation at the
site.
Hot water heating
Hot water heating
and central heating system support
persons
Water require-
ment (45°C)
in l
Area of tubes
collectors in m²
(absorber)*
Number* of
tubes
Minimum storage
cylinder volume**
in l
Area of tubes
collectors in m²
(absorber)*
Number* of
tubes
Minimum storage
cylinder volume**
in l
~ 30 to 80 litres
per person
~ 1.1 m² per 50
litre hot water
requirement
~ 2 x min. hot water
requirement
~ 1.8 to 2.5 x
Area of hot water
plant
~ 50 to 70 litres stor-
age volume per m²
collector area
from
to
from
to
from
to
from
to
from
to
2
150
3,5
35
300
7,5
75
750
3
150 200 3,5 4,5 35 45
300
7,5 10,0 75 100
750
4
150 200 3,5 4,5 35 45
300
7,5 10,0 75 100
750
4
200 300 4,5 6,5 45 65
400
10,0 14,5 100 145
1000
5
150 200 3,5 4,5 35 45
300
7,5 10,0 75 100
750
5
200 300 4,5 6,5 45 65
400
10,0 14,5 100 145
750
5
250 350 5,5 7,5 55 75
500
12,0 16,5 120 165
1000
6
200 300 4,5 6,5 45 65
400
10,0 14,5 100 145
1000
6
250 350 5,5 7,5 55 75
500
12,0 16,5 120 165
1500
7
200 300 4,5 6,5 45 65
400
10,0 14,5 100 145
1000
7
250 350 5,5 7,5 55 75
500
12,0 16,5 120 165
1000
7
350 550 7,5 12,0 75 120
750
16,5 26,5 165 265
1500
8
250 350 5,5 7,5 55 75
500
12,0 16,5 120 165
1000
8
350 550 7,5 12,0 75 120
750
16,5 26,5 165 265
1500
9
350 550 7,5 12,0 75 120
750
16,5 26,5 165 265
1500
9
500 700 11,0 15,5 110 155
1000
24,0 34,0 240 340
2000
10
350 550 7,5 12,0 75 120
750
16,5 26,5 165 265
1500
10
500 700 11,0 15,5 110 155
1000
24,0 34,0 240 340
2000
