Industrial spray application guide
Air Inlet Cooling Nozzles for Turbines and Compressors
Air inlet cooling nozzles create droplets intended to evaporate before sensitive downstream equipment. The design must use actual ambient conditions, airflow and available residence distance; unevaporated water carryover is a key constraint.
Engineering focus
What the spray system must accomplish
Cooling potential changes with temperature and humidity. Druppelgrootte, nozzle placement, water quality, control response and shutdown protection must be considered as one system.
Inputs required before selection
- Airflow, temperature, humidity and seasonal design case
- Available evaporation distance and velocity profile
- Water quality and permitted carryover
- Flow turndown, control logic and instrumentation
- Connection, installation space and maintenance access
- Required documentation, test method and acceptance criteria
Comparison
Practical nozzle starting points
| Nozzle approach | Useful starting condition | What to verify |
|---|---|---|
| High-pressure hydraulic fog | Fine droplets without compressed air | Requires suitable water quality and pressure |
| Air-atomizing spray | Wide control range and fine atomization | Adds compressed-air demand and controls |
| Multi-nozzle staged array | Variable load or nonuniform duct profile | Needs distribution survey and staged logic |
Review method
How to move from requirement to a defensible selection
- Define the process envelope. Record normal, minimum, maximum and upset conditions rather than one nominal point.
- Choose the spray function. State whether the job is coverage, impact, atomization, evaporation, gas–liquid contact, washing or cooling.
- Check distribution in the real geometry. Review spacing, overlap, obstructions, wall contact, drainage and access.
- Validate materials and maintenance. Consider corrosion, erosion, solids, filtration, cleaning and replacement intervals.
- Set an acceptance test. Use an observable measure such as coverage, flow, temperature profile, pressure, droplet data or process result.
Related applications
Technical references
These sources define process or system context. Product suitability still requires project-specific engineering review.
- Lechler — Air-inlet cooling application reference
- ASHRAE — Standards 164.3/164.4 humidifier test-method scopes
Last technical review: 31 July 2026
RFQ checklist
Send the operating data, not just a nozzle name
Include the application, fluid, flow, pressure, temperature, spray distance, connection, material preference, drawings and acceptance criteria.