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Trade showsSolar Power
International 2010 :
12th -14th October 2010,
Los Angeles
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Application range of the solar stations:
Depending on their operation mode, solar thermal systems are divided into
high-flow and low-flow systems.
High-Flow-systems operate with 25-40 litres per m² collector surface and hour which corresponds to 0.42-0.67 l / (m² x min).
Low-Flow-systems operate with 10-20 litres per m² collector surface and hour
which corresponds to 0.17-0.33 l / (m² x min).
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The flow rate which is circulated in the system depends on the operating
mode, collector surface as well as on the performance of the heat exchanger
(secondary).
The dimensioning of the circulation pump depends on the flow
rate and the pressure drops which occur in the heat exchanger, collector and
the piping system/valves and fittings of the system.
The application ranges/collector surfaces are mentioned in the product description.
The mentioned values refer to a pressure drop of about 3.5 m wc and the
most powerful pump in the system (assumed pressure drops: 1.5 m wc in the collector, 1.5 m wc in the pipes and 0.5 m wc in the heat exchanger).
A specific flow rate of 0.2 l / (m² x min) is assumed for low-flow
systems, 0.5 l / (m² x min) is calculated for high-flow systems.
The values are only a first indication for the dimensioning. It is
essential to carry out a detailed dimensioning of the system!
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PAW-Airstop
Especially designed to permanently deaerate the solar fluid of solar installations.
Optimum installation point: in the collector flow, in the solar valves
and fittings.
- accessible, easy access for servicing during operation
- high deaerating output due to low viscosity at high temperatures
of the solar fluid in the flow and due to big volume (minimal
flow velocity, long storage period)
The air separated from the solar fluid gathers in the Airstop and can be vented
from time to time. Using especially stainless steel corrugated pipes, the
system can be completely vented. |
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