Water treatment for cooling water

Use of water
in cooling circuits

In power stations, industry and commerce, waste heat has to be dissipated, i.e. a cooling circuit is required. The most commonly used coolant is water. The cooling circuit can be open, closed or be designed as a hybrid solution. Open cooling circuits are the most widespread.

In an open cooling circuit, chemically pure water is extracted from the circuit by evaporation and dissolved salts as well as other contaminants are left behind. This process is called cycles of concentration.

In order to run the cooling circuit at a target cycles of concentration, a portion of the cooling water is discarded at regular intervals (blowdown). These losses must be compensated for with treated make-up water.

Water treatment
for cooling systems

Suitable water treatment is indispensable when it comes to operating cooling systems with the highest possible cycles of concentration and thus low water consumption. In addition, the 42nd German Federal Immission Control Act (BImSchV) requires monitoring of the cooling water in order to prevent microbial contamination.

We offer all the required technology for cooling tower applications – from treating make-up water with softening units and reverse osmosis or nanofiltration for higher cycles of concentration to our specially developed dilution control system, Cooltrol data, which features an extensive range of functions and documentation of the operating data.

References
Water treatment plants Made in Germany

Nanofiltration Unit NF-S7 20000 AS/FU/SO
Cooling tower feed at an automotive manufacturer in Germany

Filtration Unit Oxidator / HEF + HSF / DEFU
Cooling tower water for a chemical industry in Bosnia and Herzegovina

Reverse Osmosis Unit UO-S7 18000 AS/FU/SO
Cooling tower water for a pharmaceutical industry in Germany

Reference project cooling water
Reverse osmosis system with PLC

Special system for the treatment of hardness-stabilised raw water. For innovative and clearer operation, the reverse osmosis system is equipped with a memory-programmable control system. In addition, this control technology enabled the implementation of a BUS connection for data transfer to the BMS (BACnet in this case).

Customer

German specialist for waste oil disposal and regeneration

Application

Cooling water supply

System technology of the UO-S7 15000 AS FU

Reverse osmosis system with 15 m³/h capacity each
Raw water stabilisation through antiscalant dosing
Control system - S7-1200 incl. BACnet connection
High-pressure pump with integrated frequency converter

Energy saving

30% through FU pump

more about the UO-D 1.500

Downloads
Product catalogue

Product overview 2025

Herco general catalogue 2025

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