Nozzles for humidifying systems

Engineering consideration 1 - Fine spray at low flow rates

The key to humidification is to create a very fine spray that will remain suspended in the air.  If the droplets are too large they will simply fall and cause undesirable moisture or wetting.  BETE produce a number of direct pressure low flow rate nozzles that produce such finely atomised sprays.

The problem is that direct pressure nozzles rely upon the kinetic energy of the fluid to break up the fluid into fine droplets.  As the internal energy of the fluid is dependant on pressure and flow rate, there is simply no way for direct pressure nozzles to form very fine droplets below a certain flow rate.  If the flow rate in question is above the level that can be suspended in the air space being humidified (i.e. above the equilibrium point for the system), then direct pressure nozzles are not an option.  Instead air atomising nozzles will need to be considered.

SNP offer a number of low flow variants of direct pressure misting nozzles which will have suitably low flow rates for most humidifying applications, but air atomising nozzles can provide ultra low flow rates and still maintain exceptionally fine droplets.  For details on how both types of nozzle work please see the information in the Humidification Nozzle Designs pages accessible by the grey menu to the right hand side of this page.