|
 The
problem is familiar. An outdoor swimming pool that is not heated is only
really comfortably warm for three or four weeks at the height of summer -
very little when you think of all the investment and maintenance you put
into it.
An indoor swimming pool has to be heated
all the year round, even in the middle of summer.
Heating a swimming pool using conventional
means of energy can be a costly business, and is also a load on the
environment. But the heating of swimming pools is an ideal application for
solar energy.
No very high temperatures are needed, but
large quantities of water have to be heated, so it makes sense to operate
such an installation with a large flow rate at a relatively low temperature
level.
In that way your swimming-pool solar
heating produces optimum efficiency.
-
Enjoy a well-tempered
swimming pool with solar heating.
-
Attractive investment for
an inexhaustible source of free energy
-
Advanced technology - your
contribution to protection of the environment
Sola Aqua solar panels are made of high molecular
Polyethylene offer the right foundations for
operating solar heating for swimming pools.
The advantages are low pressure loss, high
efficiency, absolutely frost resistant, tough enough to walk on, simple to
install, resistant to chemicals, resistant to swimming pool water and
modular design with one piece fabrication.
 The
water of the swimming pool can flow through the absorbers in either
direction, so they can be mounted both lengthwise and side by side.
The individual rows of absorbers are
connected on a same routes for each row. It is not advisable to connect more
than seven absorbers in series.
DESIGN
Recommended absorber area in % of pool
surface for open-air pools with cover or indoor swimming pools (early May
through end of September).
Temperature increases are 4-7 °C compared
to unheated swimming pools.
|
Angle Of
Inclination |
Direction Of
Inclination |
Absorber area
in % of pool
surface |
| |
E |
SE |
S |
SW |
W |
|
90º |
90 |
80 |
70 |
75 |
85 |
|
60º |
80 |
65 |
55 |
60 |
70 |
|
45º |
70 |
60 |
50 |
55 |
65 |
|
30º |
60 |
55 |
45 |
50 |
55 |
|
15º |
55 |
50 |
50 |
50 |
55 |
|
0º |
50 |
50 |
50 |
50 |
50 |
The absorber area should be chosen 50%
larger if there is no cover.
The regionally different number of sunshine
hours can be allowed for by adding or deducting up to 20% absorber area.
Pump performance
The flow rate should be 150 to 250 l/m2 absorber area per hour. The required
type of pump is easy to determine. The delivery rate is calculated from the
absorber area x 200 l. The delivery head is the difference in height between
the water level and the absorber panel plus approx. 5 m.
Technical Specifications
|
Low pressure
drop |
Approx.0.003
bar at 200 l/h/m2 |
|
Moulded in one
piece |
Homogeneous
black |
|
Flow rate |
150 to 250
l/m2/h |
|
Weight |
Approx. 6 kg/m2
- water content 6 l/m2 |
|
Testing
pressure |
4.5 bar at NT |
|
Working
pressure |
Up to 1.2 bar -
40° |
|
Efficiency
|
Up to approx.
80% - power up to 0.8 kWh/m2
Average value 0.5
to 0.6 kWh/m2 |
|
Operation |
Often possible
with existing filter pump |
|
Temperature |
Resistant from
-50 to + 115°C |
| |
|
|
Non-corroding –
resistant to swimming-pool water |
|
Pool water
pumped direct through absorber |
|
supports human
weight |
| |
|
Different configurations of
swimming-pool solar heating
|
 |
|
1. Operation with filter pump via
three-way motor ball valve with difference-temperature
regulation
This configuration can usually be selected if the absorbers are
not to be set up higher than 6 m above the surface of the water.
The three way motor ball valve is integrated into the pressure
line of the filter installation.
Because of the difference
temperature regulation the ball valve is changed over when the
absorber temperature is higher than the temperature of the water
of the swimming pool.
The filter stream is then
pumped through the absorbers. The warmed water flows back into
the filter circuit by way of a Tee. |
|
 |
2. Operation with own pump and difference
temperature regulation
integrated into filter circuit
In many cases it may be sensible
or even necessary to install a separate pump for the solar
heating.
For example when the
delivery head from the water level to the absorber panel is more
than 6 m. The water is diverted from the filter installation by
way of a Tee and pumped through the absorbers by the auxiliary
pump. This pump is switched by the difference-temperature
regulation to ensure that it only runs to actually gain energy.
The filter and solar pump
are separately regulated.
It is usually advisable to
integrate non-return valves in both the solar and the filter
circuit. |
|
 |
|
3. Operation with own pump and
difference-temperature regulation - piping independent of filter
circuit
This configuration
is chosen when the filter piping is difficult of access. The
water is sucked out of the swimming pool by an immersion pipe,
pumped through the absorbers, and the warmed water is conducted
back into the swimming pool.
Here too the
difference temperature regulation ensures that the pump only
runs to gain energy. If the pump is mounted above the water
level and the delivery head is more than 5 m, a non-return valve
should be incorporated. |
The components:
1 Absorber
2 Difference-temperature regulator
3 Filter installation
4 Solar circuit forward and return
5 Three-way motor ball valve
6 Temperature sensor, absorbers |
7 Temperature
sensor, swimming pool
8 Vent valve
9 Stop cock (downdraft brake)
10 Drain cock
11 Pump for solar circuit
12 Non-return valve |
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