💧 Selecting Moisture Eliminators for High-Velocity Cooling Coils

nexoradesign.net
5 days ago
2 min read

When air passes through a wet cooling coil at high velocity, condensate can be pulled from the coil surface and carried into downstream ducts, filters and equipment. This can cause corrosion, water leakage, microbial growth, damaged filters and increased maintenance.

A moisture eliminator helps prevent this problem by forcing the air through specially designed vane profiles. Water droplets strike the vanes, combine into larger drops and drain into the AHU condensate pan while the treated air continues downstream.

However, selection should never be based on coil face velocity alone. Engineers must consider:

✅ Maximum and minimum airflow

✅ Average and local coil face velocity

✅ Droplet-removal efficiency

✅ Eliminator free-area velocity

✅ Clean and wet pressure drop

✅ Condensate and drainage capacity

✅ Profile orientation and module height

✅ Corrosion-resistant materials

✅ Cleaning and maintenance access

✅ Fan power and available ESP

For wet cooling coils without confirmed carryover data, a face velocity of approximately 2.0–2.5 m/s can be used as an initial screening range. It is not a universal limit. The final decision must be supported by coil and eliminator manufacturer performance data. (Selecting Moisture Eliminators for High-Velocity Cooling Coils)