Particle Size Testing Services
The size of the particles generated by the evaporation of the drift from a cooling tower is a function of the size distribution of the drift as well as the water chemistry. We can also measure the size of the droplets exiting the tower (7 to 4000 microns) and determine PM size fractions (PM10 and PM2.5). To do this, CleanAir has adapted a laser technology to measure the size distribution of cooling tower drift – Oxford Laser’s VisiSize D30.
With this technology, we can measure the portion of the drift droplet between 10 and 50 microns. Analyzing this part of the spectrum improves our ability to measure PM size distributions. It is also critical for getting PM10 and PM2.5 fractions.
We deploy our laser-based system above cooling tower fan stacks. The camera and the laser are mounted so that we can adjust where we measure. The specific number of measurement points and sampling time lengths can vary by application, but each of our system contains:
- A pulsed class 4 laser
- Video camera with adjustable magnification (2x, 4x, and 7x) and 30 fps frame rate
- Image processing software – used to determine the particle size distribution