What Details Should Be Paid Attention To When Using A Closed Circuit Cooling Tower?
Jan 09, 2026
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closed circuit cooling tower
The operational efficiency and service life of a closed circuit cooling tower depend heavily on the meticulous management of daily usage details. The core lies in "Preventing Scaling, Preventing Corrosion, and Preventing Freezing." Below are key details ranked by importance:
Water Quality Management (The Core of the Core)
This is the primary factor determining equipment efficiency and lifespan.
Water Treatment: It is essential to treat the spray water (external circuit) through softening, filtration, and sterilization to prevent scaling and algae growth. For the internal process circulating water, corrosion and scale inhibitors should be added according to the characteristics of the medium.
Regular Monitoring: Periodically test water parameters including pH value, conductivity, hardness, and microbial indicators.
Daily Operation and Monitoring Details
Startup/Shutdown Sequence:
Startup: First start the circulating water pump. Ensure the system is completely filled with water and thoroughly purged of air before starting the fan.
Shutdown: First stop the fan, wait for an interval, then stop the water pump to ensure the coil is adequately cooled.
Key Parameter Monitoring:
Inlet/Outlet Water Temperature Difference: The normal range is typically 5-15°C. A difference that is too small indicates decreased heat exchange efficiency (potential scaling); a difference that is too large requires checking for overload.
Circulating Water Pressure: Abnormal pressure drop may indicate a system leak; abnormal pressure rise could be due to filter blockage.
Spray Water Flow and Uniformity: Ensure all nozzles are clear and water flow evenly covers the coil surface.
Seasonal Maintenance Focus
Winter Freeze Protection (Critical):
Continuous Operation: This is the best freeze protection strategy, requiring maintained water circulation. Ethylene glycol antifreeze can be added to the circulating water.
Long-Term Shutdown: It is mandatory to completely drain all stored water from the spray system, internal coils, and all pipelines, and purge residual water with compressed air.
Auxiliary Measures: Install electric heat trace cables and insulation on exposed pipes and valves.
Summer High Temperatures:
Focus on checking fan belt tension, motor current, and bearing temperature to ensure maximum heat dissipation capacity.
Clean the spray water filter screen to prevent clogging.
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