Even though Energy Labs has been building indirect evaporative cooling for over 30 years, demands for energy efficiency make this technology even more relevant today. Over the years, we have designed systems with EER’s exceeding 100. Our indirect evaporative cooling allows engineers and owners to get the efficiency benefit of water evaporation without concern for water carryover into the building. In addition, we can design the indirect evaporative heat exchanger to be used for heat recovery when ambient conditions requiring heating. Applications include 100% outside air, and multi-stage systems that combine indirect evaporative cooling with DX, chilled water or direct evaporative components. Indirect evaporative systems perform very well in dry climates with high dry bulb temperatures. Energy Labs Indirect Evaporative Cooling Systems are available in many different sizes and configurations and can be customized for any project.

HOW IT WORKS

With indirect evaporative cooling, there are two opposing airstreams that contact a different side of a polymer heat exchanger. The outer wall of the heat exchanger contacts air that needs to be conditioned before it is delivered to the occupied space. The inner wall is in contact with air that comes from the ambient environment or building exhaust.

Indirect evaporative cooling occurs when water sprayed to the interior wall of a heat exchanger evaporates. When the water evaporates, the heat of vaporization imparts a cooling effect to the outer wall of the heat exchanger. This allows the airstream which contacts the outer wall to be sensibly cooled.

Other components include a recirculating pump, spray nozzles and a water sump that deliver water to the inside of the heat exchanger.

WHY OUR INDIRECT UNITS BETTER

Our indirect evaporative cooling polymer has been tested for capacity and reliability for over 30 years. The mechanism we use to bond each individual tube to the header is a special chemical process. With this process the bond between the components is stronger than the surrounding polymer. Other competitors use an epoxy gel to seal around each tube. The result is a less reliable seal and increased chances for leaks and performance loss than Energy Labs product. In addition, Energy Labs uses only stainless steel to form the indirect evaporative cooler casing for maximum corrosion resistance. Instead of using a semi-submersible pump to re-circulate water over the media, Energy Labs uses an externally mounted industrial pump. A semi-submersible pump is less reliable and has shorter life expectancy.