Design - Design Conclusions
Waste Water Evaporation Water Treatment Water Mister System
Design Conclusions
To successfully build a machine that will accelerate evaporation, our goal was to achieve a hang time of at least 20 seconds for a water droplet that is 180 microns
We could achieve smaller water droplet sizes, however the trade off is drift, and many customers have the restriction of retaining all drift within a lined area, to comply with the EPA. In addition, our turbine has the capability of generating enough loft to produce an average hang time for water droplets in the range of 180 microns, there by allowing good average returns on evaporation, of the total water droplets set aloft while restricting drift due to utilization of this droplet size, or larger
If we wish to increase the overall percentage evaporated of the total pumped aloft, we can easily achieve this by reducing the nozzle size, thus the water droplet size, however, this not only increases the drift potential, but it in fact has diminishing returns, in that it reduces the overall output of a evaporator unit.
That is, it is advantageous to evaporator 60 % of 66 gallons per minute rather than 100% of 35 gallons per minute, unless other variables dictate the fall out is problematic.
Evaporator design configuration below is based upon these conclusions; this machine was built from the ground up as an evaporator, with a specific goal, to accelerate natural evapor
The above diagram outlines the initial pattern for our standard calibration, which at 100 psi will pump 66 gallons per minute aloft. This same pattern results when 200 psi is used but results in a total of 94 gallons per minute being pumped aloft. The percentage evaporated, of the total pumped aloft, will vary greatly depending upon the temperature and relative humidity, and to a lesser extent by the wind speed, due to the fact, we generate our own wind speed of in excess of 100 mph
Virginia Tech established a water droplet of 175 microns would have a terminal velocity of 2.0 ft/sec. They also established that this size water droplet (175 microns) would evaporate in 20 seconds. These figures are from an average of results shown on slide 15 of 20, shown on a previous page, with conditions of 90 degrees F at 36% humidity as noted.
In the above configuration, the evaporator will put 100% of the water droplets above the elevation required to evaporate a droplet of 180 microns, which is 40 feet. That droplet size is an average, the large end of the spectrum may not evaporate completely, to achieve this size water droplet the overall thru put would be reduced to 49 gallons per minute at 100 psi, but can be maintained at 94 gpm at 200 psi and achieve the same
When variables change, the results will change, which make this more of an art than a science.