Ultrasonic misting nozzles can support evaporative cooling when the droplets remain in moving air long enough to evaporate. Cooling performance is determined by ambient temperature, humidity, airflow, water addition, nozzle placement and control—not by a nozzle model alone. Use the verified SK508, SV882 and SV980 data to size a trial, then measure the real result.
When evaporative cooling fits
Evaporative cooling is most practical where the air can absorb additional moisture and where ventilation carries the fine spray through the intended zone. As ambient humidity rises, the available evaporation capacity decreases and the risk of surface wetting increases. Any stated temperature reduction must therefore be tied to measured site conditions and a documented test.
Start with a site trial if the area is open, has changing wind, includes moisture-sensitive equipment, or operates across wide seasonal conditions.
Verified nozzle data for trial sizing
| Model | Air requirement | Water requirement | Tested average droplets | Approx. no-wind distance | Angle |
|---|---|---|---|---|---|
| SK508 | 5.0 bar; 112 L/min | 1.0 bar; 0.359 L/min | 10.02 μm at 0.5 m | ≈2 m | 80° |
| SV882 | 5.0 bar; 240 L/min | 1.0 bar; 0.746 L/min | 13.79 μm at 1.5 m | ≈3.5 m | 60° |
| SV980 | 3.0 bar; 307 L/min | 0.5 bar; 0.688 L/min | 15.82 μm at 2.0 m | ≈4 m | 30° |
The droplet values are test averages measured at the stated heights. Distance is approximate under no-wind conditions. Actual evaporation and coverage depend on the installation and environment.
SK508 is useful for a wider, shorter listed pattern and has the lowest air demand. SV882 provides a 60° mid-range pattern. SV980 is narrower with the longest listed no-wind distance, but requires 307 L/min air per nozzle.
Evaporative cooling design variables
| Variable | Engineering check |
|---|---|
| Temperature and humidity | Measure representative operating ranges, including the warmest and most humid conditions. |
| Airflow | Confirm direction, speed, recirculation and outdoor wind changes. |
| Water addition | Calculate total flow from active nozzle count and prevent operation beyond the zone’s evaporation capacity. |
| Compressed air | Check continuous flow and pressure with every intended nozzle operating. |
| Placement | Provide residence time for evaporation and avoid direct spray on people, products, floors or electrical equipment. |
| Water quality | Define treatment, filtration and hygiene requirements for the facility. |
| Controls | Interlock spray with ventilation and use temperature/humidity limits appropriate to the process. |
For utility calculations and mounting, use the ultrasonic nozzle installation guide.
Application evaluation
Loading docks and open industrial areas
Wind and door movement can move the spray away from the target. Test nozzle direction and active zones under representative traffic and weather conditions.
Greenhouses
Coordinate cooling with crop, ventilation, disease-management and irrigation requirements. Avoid assuming that a cooling nozzle setting is also the correct humidity strategy.
Livestock ventilation
Any cooling system should be reviewed by the responsible facility and animal-care professionals. Verify ventilation, water hygiene, wetting, electrical safety and species-specific operating limits.
Process-air or equipment cooling
Protect moisture-sensitive products and equipment. If direct surface wetting is required rather than air cooling, a different spray technology or model may be more suitable.
Commissioning and acceptance
- Record the nozzle model, count, mounting height and direction.
- Measure air and water pressure under full simultaneous flow.
- Record temperature and humidity before spray activation.
- Observe drift and check surfaces along the airflow path.
- Measure conditions at multiple representative locations and times.
- Test the high-humidity or ventilation-loss shutdown.
- Document the control settings and the conditions under which spray must stop.
Do not report a fixed cooling temperature or percentage without a defined measurement method and site test. If the spray is weak or intermittent, follow the troubleshooting guide.
Evaporative cooling RFQ checklist
- Area dimensions and layout
- Temperature and humidity operating range
- Ventilation rate, airflow direction and outdoor wind exposure
- Cooling objective and acceptable surface wetting
- Available compressed-air pressure and continuous flow
- Available water pressure, quality and treatment
- Mounting height, electrical equipment and sensitive surfaces
- Control sequence, sensors and operating schedule
Jeltecn is a registered brand of Melinco Precision Technology Co., Ltd., the manufacturing factory. Compare SK508, SV882 and SV980 or send the site conditions for a nozzle recommendation.
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