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Evaporators, Dryers & Condensers

Evaporative condensers are designed to dissipate heat by using the evaporation of water to cool and condense refrigerant or process fluids. Fouling and scaling can indeed be problematic in evaporative condensers, which are heat exchange devices used in various cooling systems, including refrigeration, air conditioning, and industrial processes.

Fouling in evaporative condensers refers to the accumulation of debris, dirt, dust, airborne particles, biological growth, and other contaminants on the heat exchange surfaces, such as the condenser coils and tubes. Fouling reduces heat transfer efficiency, restricts airflow, and decreases the condensing capacity of the unit. It can lead to increased energy consumption, higher operating pressures, reduced cooling performance, and potential damage to the equipment.

The main cause of scaling in evaporative condensers is dissolved minerals in the water. Materials such as calcium carbonate, calcium sulphate, or silica may precipitate and form solid deposits on the heat exchange surfaces of the condenser. Scaling reduces heat transfer rates, decreases airflow, and impairs the condensing process. This can lead to higher energy consumption, increased operating pressures, decreased cooling capacity, and potential equipment failure.

Factors contributing to fouling and scaling in evaporative condensers include:

The quality of the water used in the evaporative condenser is a crucial factor. Water with high concentrations of dissolved minerals, suspended solids, or organic matter is more prone to fouling and scaling.

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