NEWS CENTER
Oasis Iceberg
11
2024
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07
Precautions for Preventing Freeze Damage in Cross-Flow Closed Cooling Towers
Oasis Ice Peak: As winter approaches, we need to pay attention to freeze protection for our crossflow closed cooling towers! Our crossflow cooling towers are designed and selected based on the higher wet-bulb temperatures typical of summer conditions. However, during seasons when wet-bulb temperatures aren’t as high—especially in the cold winter months—their cooling capacity actually becomes excessive.
Oasis Ice Peak: As winter approaches, we need to pay attention to freeze protection for our cross-flow closed cooling towers!
Our cross-flow cooling towers are designed and selected based on the higher wet-bulb temperatures typical of summer, but during seasons when wet-bulb temperatures aren’t as high—especially in the cold winter months—their cooling capacity ends up being excessive.
Everyone knows that the outlet water temperature of a cooling tower is not greatly influenced by ambient temperature—it is primarily determined by the wet-bulb temperature. Even when the ambient temperature is above 0 degrees Celsius, a closed-loop cooling tower may still experience low outlet water temperatures due to an excessively low wet-bulb temperature during operation.
The water pipe inside the cooling tower's tube drops to below 0 degrees Celsius, even resulting in freezing conditions.
Whether it's freezing in the tower's internal circulation system or the external circulation system, both scenarios can potentially lead to cracks in internal components such as piping and cooling copper tubes. This clearly underscores the critical importance of frost prevention during winter.
Our antifreeze system is also primarily divided into two major components: the internal circulation system and the external circulation system.
I. The Internal Circulatory System
1. Add antifreeze fluid (such as ethylene glycol). Taking ethylene glycol as an example, it has high solubility and a low freezing point—indeed, the higher the concentration, the lower the freezing point. However, be mindful that excessively high concentrations may negatively impact the cooling tower's performance. Therefore, it’s important to maintain the right balance. Also, after winter ends, make sure to replace the water inside the tower with fresh, clean water for continuous circulation.
2. If the cooling tower remains idle for an extended period and antifreeze has not been added, the circulating water inside the pipes can be drained.
3. When the ambient temperature is above 0°C, the unit can utilize an automatic control system to prevent freezing. If the outlet temperature drops too low, the spray pump will automatically shut down. If the temperature continues to fall below this lower threshold, you can try stopping the fan—this will also help avoid ice formation, as the water temperature inside the pipes will gradually rise after these measures are taken.
II. External Circulatory System
1. Prevent the lower sink from freezing (optional: install an electric water heater, etc.)
2. Insulation material can be installed on the circulation pipes outside the sink.
3. When not in use for an extended period, drain the external circulation water and keep the sink pump's drain valve open.
After completing the above tasks, it’s also necessary to regularly inspect the cooling tower’s condition.
Oasis Bingfeng Fluid Equipment Co.,Ltd
Contact Phone:+86 4000 616 676
Fax:+86 0310 3178005
E-mail:sales@hdbingfeng.com
Contact Address:No.1, Happiness Road, Feixiang Economic Development Zone, Handan City, Hebei Province
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