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Oasis Iceberg
18
2025
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08
What factors influence the selection of a closed-circuit cooling tower?
The selection of a closed-circuit cooling tower requires a comprehensive consideration of core factors such as thermal parameters, environmental conditions, process requirements, and cost control. The following is an analysis from the perspectives of thermal parameters and environment:
The selection of closed-circuit cooling towers requires comprehensive consideration thermal parameters, environmental conditions, process requirements, and cost control and other core factors. The following is an analysis from the perspective of thermal parameters and environment:
I. Core Thermodynamic Parameters
| Parameter | Selection Impact | Typical Industrial Values |
|---|---|---|
| Cooling Load (Q) | Determines tower size → For every 100kW increase in load, coil area needs to increase by 3~5㎡ | Chemical industry: 500~2000kW |
| Inlet/Outlet Water Temperature Difference (ΔT) | If ΔT < 5℃, coil area needs to be increased; if ΔT > 10℃, tower size can be reduced | Conventional: 5~8℃ (chilled water) |
| Wet Bulb Temperature (Twb) | Design baseline! For every 1℃ increase in Twb, cooling efficiency decreases by 3%, requiring a 10% increase in heat exchange area | Shanghai summer: 28℃; Middle East: 35℃+ |
| Medium Characteristics | High viscosity → reduced flow rate; strong corrosiveness → titanium tubes/316L stainless steel required; low freezing point → adjust ethylene glycol solution concentration | Ethylene glycol solution concentration: 25%~40% |
II. Environmental and Site Constraints
Climate Adaptability
High humidity areas (e.g., coastal): need to increase 15%~20% margin to compensate for evaporation efficiency loss
Windy and sandy environments Configure three-stage filtered spray water system (filter precision ≤200μm)
Cold regions Mandatory installation of anti-freeze electric heat tracing + variable frequency fan (operating conditions below -15℃)
Space Constraints
Compact selection Counterflow towers save 30% footprint compared to crossflow towers (e.g., rooftop installation)
Noise-sensitive areas Select ultra-quiet models (≤65dB(A)), requiring soundproof air ducts
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