Redesigned hybrid cooler to be unveiled in Q4 2024
Adiabatic cooling solutions offer superior thermal performance and allow operation at ambients higher than process fluid temperatures. However, the downsides of adiabatic systems are substantial water consumption and high initial costs.
A novel heat exchanger wetting solution deployed in a range of hybrid coolers recently engineered by Kaltra solves the drawbacks inherent in adiabatic/evaporative coolers.
Heat exchanger wetting is carried by gravity-fed water flow. Unique fin surface geometry ensures uniform wetting over the heat exchanger area. This approach provides several advantages not found in traditional adiabatic solutions based on water spraying or the use of evaporative pads:
- Low water consumption: water is collected and pumped for iterated wetting of the heat exchanger surface
- No additional air pressure drop is created compared to systems with evaporative pads
- EVAP II design eliminates additional equipment and parts (pads, spray nozzles, pipework, etc.), making it inexpensive but efficient
- Minimum maintenance required
Optionally, heat exchangers can be supplied with anti-corrosion treatment (e-coating) ensuring the long lifespan of the cooler and the use of untreated tap water for wetting.
A specialized controller with an air temperature sensor allows automatic switching between dry and wet operating modes.
New hybrid coolers are based on Mistral-W series dry coolers and incorporate models with 4 to 18 fans driven by EC motors. Options include factory wiring, fan speed controllers, a dedicated electrical panel, pumping for wetting water, and more. By request, stainless steel heat exchangers can be installed.
Headquartered in Germany and Austria, Kaltra designs, develops, and manufactures air conditioning and refrigeration equipment and systems. The company offers air-cooled, water-cooled, and free cooling chillers, precision air conditioners, IT cooling systems, including room-, rack- and row-based solutions, and energy management solutions. It also designs and manufactures air-cooled condensers, dry coolers, and cooling units for special applications. Additionally, Kaltra offers microchannel heat exchangers for condenser, evaporator, and water cooling and heating applications, as well as aluminium coils for small cooling applications. All Kaltra products are engineered with the clear objective of improving energy efficiency and reducing total cost of ownership.
For more information on Kaltra and its products call +49 (0) 911 384 333 48 or visit www.kaltra.com
