Synonymous to human physical perspiration, industrial evaporative cooling, also known as swamp cooling provides effective cooling solutions. It works by reducing the temperature through evaporation of water, which successfully removes the latent heat from the surface where evaporation takes place. This common scientific process is employed in industrial and domestic cooling systems for outdoor spaces, large indoor areas, and manufacturing units. An evaporative cooling system is capable of cooling millions of square meters of the area using the treated fresh air.
New age evaporative cooling systems
Innovation has led to new age cooling systems that are pure engineering marvels. High-end technology cooling systems also adhere to changing customer needs. A pioneering invention in this field is indirect evaporative cooling that uses DAMA (dry air moist air) as its core technology. A state-of-the-art DAMA heat exchanger is a plate-type polymeric exchanger with cross-flow. This highly optimized heat exchanger allows warm, primary air to flow in enclosed channels, give up its heat and condense to water films that flow down the other side of polymeric plates. A secondary air stream flows in the opposite direction to the water and evaporates it before outdoor exhaustion takes place. Using DAMA, the primary air cools without adding any further moisture.
Four operation principles primarily work in an evaporative cooling system:
- Indirect Evaporative Cooling (IEC)
- Direct Evaporative Cooling (DEC)
- Indirect Direct Evaporative Cooling (IDEC)
- Indirect Evaporative Cooling and CWC/DX
In the field of comfort cooling, IEC is an innovative and revolutionary change. The operation principle working in IEC allows the primary (warm) air to cool by losing its heat to a thin film of water on the other side of a conducting surface. Next, another stream of air evaporates the water, thereby converting a major part of the sensible heat into latent heat before outdoor exhaustion. The primary air gets cooled without coming into contact with the water stream. IEC reduces the wet bulb temperature, dry bulb temperature, and the primary air’s enthalpy without adding any moisture to it.
Safe and effective
The question is how eco-friendly are they? Evaporative cooling systems are upgraded by regular research and development for them to remain eco-friendly. Being cost effective and reliable is another important requirement to meet the varied industry demands. Depending on the industry and other coordinates, evaporative coolers can be customized. Also, depending on the installation, process conditions and heat loads may differ.
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