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Fogging Systems (Adiabatic)
Fogging systems use compressed air to atomize water and create a stream of microscopic water particles, which appears as fog. The water particles quickly change from liquid to gas as they absorb heat from the surrounding air, or air stream. Properly designed fogging systems include sufficient heat in the air to allow the water to vaporize, avoiding "plating out" of water on surfaces, which might lead to control or sanitation problems.
Fogging systems contain virtually none of the heat of vaporization required to increase RH to desired conditions. For this reason, fogging systems humidification is a virtually constant enthalpy process. As the psychrometric example illustrates, DB temperature changes as RH increases. This evaporative cooling can provide energy benefits for systems with high internal heat loads
Unlike many adiabatic humidifiers, properly designed fogging systems are able to modulate both compressed air and water pressures to provide modulated output. Although time and distance are required for evaporation, response to control is immediate. High evaporation efficiency guarantees maximum system performance.
A water analysis is suggested prior to applying fogging systems when reverse osmosis (RO) or deionized (DI) water is not available
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