EVAPORATIVE COOLER CONTROLS
Industrial and commercial evaporative cooling units recently introduced advanced features to the market like variable air volume control. Additionally, lower air velocity increases heat transfer effectiveness significantly reducing system fan power.
An advanced feature not commonly available on evaporative coolers would include the use of sensors to monitor system performance. Temperature and humidity measurements allow for an estimate of system effectiveness. Static pressure gauges measure pressure drops across the media can also be used to determine when media maintenance is required.
Due to the higher air temperatures than traditional air conditioning systems, more air is required to provide the necessary cooling. As it is generally 100% outside air evaporative units will match the existing mechanical exhaust loads of a building.
BENEFITS OF EVAPORATIVE COOLING
Industrial and commercial evaporative cooling systems have several benefits. These systems use only a fraction of the energy of typical compressor-based cooling systems. Highly-efficient evaporative cooling systems can reduce energy use by 70% (the actual savings will vary with the type of evaporative system and climate). For dry climates where evaporative cooling can meet the entire load, the units dramatically reduce peak-demand. When evaporative cooling is used with supplemental DX cooling it can reduce the DX cooling required. Moreover, since they use 100% outside air for cooling, the right evaporative cooling system can improve indoor air quality while reducing overall operating cost and energy consumption.
Content Source: Energy Design Resources e-News April 2010