Hollow Cone Spray Nozzles for Evaporative Cooling and Atomization
HOLLOW CONES Hollow cone spray nozzles are more specialized than flat sprays or full cones. Available in virtually any material and several spray angles, the pattern generated by this type of nozzle swirls the fluid into a "ring" pattern. Hollow cones are often used for cooling, humidifying and various types of gas conditioning applications because they generate what are considered to be fine droplets. |  |
Why use hollow cones for reactions and cooling?
Imagine two droplets of the same size, one droplet you break up [atomize] into 1000 smaller droplets and the other you leave alone. If you measure the surface area of each "small droplet" and add them up, the result will be more than the total surface area of single large droplet. Simply put, the smaller the droplet size, the more surface area you'll have at a given flow rate. More surface area translates into more efficient heat transfer, surface contact and reaction with gas streams.
Hollow cones can generate droplets sizes within a 40 to 500 micron SMD range depending upon the capacity and operating pressure. Studies have shown that at pressures from 2000 PSI to 3000 PSI that their is a diminishing return of energy to droplet size reduction. In one test for an inlet fogging nozzle system, a 13% decrease in droplet size was measured for a 50% increase in pressure. Our expertise and value to our customers is being able to identify the most efficient method of atomization for a given application. Our knowledge of sealless high pressure pumps provides additional insight for evaporative cooling and humidification applications.
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| There are variations of the nozzle pictured above. For instance there are designs that do not have internal vanes (reduces chance of pluggage). | |
Our Spray Nozzle Engineering Manual has several pages dedicated to hollow cone nozzles.
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