Free cooling systems

Depending on the water quality and operating conditions, the use of special water additives is necessary to prevent deposits, corrosion and contamination. Corrosion inhibitors are added to keep corrosion rates low. The range on offer takes into account the materials, water quality and operating conditions. Combination products with a cleaning effect are often used to keep surfaces clean at the same time. Hardness stabilisers and dispersants can prevent new deposits and remove existing ones. In this case, having the appropriate filter technology is a prerequisite. The correct dosage is provided by quantity-controlled dosing pumps, depending on the level of water consumption. The use of broad-spectrum biocides is necessary to prevent system germination. Germs can attack materials, clog heat exchangers with slime and change the water quality. Regular doses prevent this.

Nowadays, highly efficient EC motors on the fans around the condenser should be speed-controlled, which means they are controlled according to demand and represent part of the energy efficiency of an overall system.

Protects the system against impurities and blockages in the heat exchanger channels.
Reduces deposits of biological matter.
Stainless steel strainer basket filters with bypass for cleaning during operation.

Avoid harmful, short compressor running times in chillers by using a sufficiently large tank.
Partition walls serve to avoid mixing temperatures.
Stable temperatures due to large buffer tanks.
Optimum output conditions for pumps.
Flexible retrofitting of pumps and water technology.

Removal of solids is important for high
operational safety and proper water quality.
All larger particles (200 µm) in the main stream are removed with a sieve cloth to protect plant components.
Monitoring and a bypass circuit are important here. In a separate side stream, on the other hand, even the finest solids (5 µm) should be continuously removed, e.g. with a filter cartridge or a sand filter. Otherwise, this could lead to silting or deterioration of water additives. Depending on the design, automatic cleaning of the filter by backwashing is possible.