Misters are simple machines that most people know as those giant appliances that blow some sort of smoke. That is not smoke, it is in fact mist. Mist fans are similar to electric fans in several ways, but are also different.
Mist fans are used in a wide variety of different applications. Sure most people know them as those machines used for outdoor cooling, but there is so much more to them than that. Their unique operation affords mist fans a great deal of versatility. They are more than just some piece of appliance that people can use for keeping themselves cool outdoors.
Mist fans see use in industrial applications where they are used for odor and dust control or to keep machines from overheating. They are used in agricultural applications in order to keep environments humid or to cool off livestock.
Whatever the case might be, misters are amazing pieces of machinery that do not get the kind of attention and recognition that they deserve. Below is a brief overview of how this amazing piece of machine works.
The mechanics behind mist fans
A mist fan, like an electric fan, has an electric motor. This electric motor is connected to a shaft. The shaft has several fan blades attached to it which move when the shaft rotates. The blades are made at a certain angle. This angle is crucial as it helps the fan blades manipulate the air.
The fan blades are angled in such a manner that it draws in the air from the rear. The air drawn by the fan blades force the air to move forward. The effect is continuous for all fan blades so long as they keep rotating. In essence, the rotating fan blades are what generate the stream of air. The strength of the air current depends on how fast the fan blades can rotate.
Evaporative cooling: the science behind the cold air
Misters are not as simple as electric fans. Sure, both of them are similar in that they move large volumes of air by using an electric motor to rotate a few fan blades that generate an air stream. However, the similarities end there.
What makes a mist fan different from a vanilla electric fan is that the former is capable of producing a colder stream of air. This cold stream of air is made possible by a phenomenon known as evaporative cooling. Evaporative cooling is the process of cooling an object by allowing a liquid to absorb heat until it evaporates to take the heat with it.
In this case, the mist fan has a water pump attached to it. The water pump is capable of producing super tiny droplets of water. These tiny droplets of water immediately evaporate once they come into contact with the air thereby taking some of the heat and cooling it.
Water pumps and the mist
Water pumps are the components of a mist fan that is responsible for producing all those tiny droplets of water. The water pump is an important part of any mist fan. Without the water pump, the mist fan is really nothing more than a regular electric fan.
There are plenty of different water pump systems out there; however, they can be categorized into three different groups. High pressure mist fans are those fans which are used for large outdoor events. They usually produce around a thousand PSI (pounds per square inch). Medium pressure mist fans are often used for residential purposes. Low pressure mist fans are often bought for personal use.
There are also two kinds of systems for producing mist. Some mist fans use nozzles to produce a fine mist, but these mist fans can get clogged by hard water. Other misters use a centrifugal system that does not clog, but only produces a drier sort of mist.