If you have ever attended a large outdoor event or noticed the sidelines during a television football match, then you must’ve surely seen the misting fans in action. In some shopping malls and similar places, the misting fans would be surrounded by open canvas flaps and are promoted as chill zones. The misting fans have the capability to make the air surrounding it to 40 degree Fahrenheit cooler than the normal temperature. These misting systems are capable of bringing down the temperature within minutes of operation.
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If the misting fan is used in a closed environment like the green house, it initially cools the whole area and thereby providing high degree of humidity for the plants. The misting devices are even utilized in some specialty stores for keeping the offering fresh for the customers. Such cooling systems can provide a great shopping experience for outdoor product stands with their air conditioning effect. Evaporative cooling and thermal dynamics are the basic working principles of a misting fan. This can be explained using a small demonstration. If you keep a wet towel in front of the electric fan, you can see that the area around the towel would become comparatively cooler. This happens because as the water from the towel evaporates, certain amount of heat energy is taken along with it. Thus the fan acts like an air conditioner by circulating the cooler air around the room. The same idea and technology is been used in the misting fans where the evaporative cooling takes place in a more efficient and productive way.
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The whole system begins with water. Water pressure is generated to reach a rating of 1000 PSI (pounds per square inch) by using special high pressure pumps. The water is spurted out through extreme fine nozzle openings in the pump. These water droplets are micron sized owing to the nozzle size. As a result of this, a thin mist is created around the system. This mist would evaporate immediately as it comes into contact with warm ambient air and heat. As the micron sized droplets take in heat energy along with them, the air temperature is dropped drastically. The fan in front of the system would blow the cooled air and mist for a very long distance.
As discussed earlier, the mist produced by the misting fan is so fine and due to this there are no chances of the surrounding areas to become wet. The effect would be very similar like standing in a light fog. The water would probably condense on cold surfaces but it would be barely felt on the human skin. Wetness would be felt only if someone stands less than 6 inches (15 cm) near the water nozzle. The misting fans are highly hygienic as the water that comes out of the fans is filtered for impurities before entering the nozzles. The total amount of water used would be a maximum of about 3.8 to 7.6 liters per hour.
The misting fans that come in smaller units are also available for household uses. Those who are interested in working in backyards and garages find the fans are most useful during hot summer days. Moreover they won’t need extra requirements for functioning for they are already equipped with water pumps and nozzles.
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