HYAC hybrid air coolers
Combining traditional air cooling and closed-loop evaporative cooling, Alfa Laval hybrid air coolers (HYAC) offer reliable and effective cooling for a range of industrial applications. By switching cooling modes to match the natural temperature cycles of the ambient air, an Alfa Laval HYAC takes advantage of the cooling possibilities offered by nature on any given day to optimize water and electricity consumption, while maximizing cooling capacity.
Hybrid air-coolers built for sustainability and performance
- Fully customized to your operating conditions and requirements
- Robust, industrial-grade equipment with outstanding performance over time
- Exceptional cooling performance and minimal water consumption
- Compact size, making it possible to upgrade cooling capacity even where available space is limited
- Low energy consumption
What makes Alfa Laval's hybrid air-coolers different?
HybridCool
Combined wet and dry bulb cooling for minimized water consumption.
FlexWater
A WSAC can operate on recycled water of low quality such as blowdown water.
WetSurface
Maximum cooling efficiency and lowest possible output temperature.
How hybrid air coolers work
Working principle of HYAC SZ
An Alfa Laval HYAC SZ has one cooling zone. When the ambient temperature is low, the HYAC system operates as a traditional air-cooled heat exchanger; the hot medium flows through a bundle of finned tubes, and a fan draws cool air over the tube surfaces to cool the medium inside.
When the ambient temperature rises above a certain level, wet cooling mode is activated, and water is sprayed on the tubes. The heat from the hot medium evaporates the water on the tube surfaces, which increases cooling significantly.
Since wet cooling only is engaged when required, substantial amounts of water is saved compared to a cooling tower solution. And compared to an air-cooled heat exchanger, a HYAC system is much smaller and has fewer fans, saving both CAPEX and OPEX.
Working principle of HYAC DZ
An Alfa Laval HYAC DZ has two cooling zones. The first is a traditional air-cooled heat exchanger, and the second is an evaporative cooler, very similar to a standard Alfa Laval WSAC.
During normal operation, both zones are always engaged. The hot medium is first cooled in the air-cooler zone, approaching the dry bulb temperature, and is then further cooled in the second zone, reaching a final temperature close to the wet bulb temperature.
This two-stage cooling results in a much higher cooling capacity and lower output temperature than for traditional air-cooled heat exchangers. It also saves water compared to standard evaporative cooling systems and cooling towers. In addition, the dual zone design also leads to less visible plume.
This makes Alfa Laval HYAC systems the perfect solution for expansions where increased cooling and low water consumption are required and where space is limited. Thanks to its high cooling efficiency, a HYAC system is much smaller than a comparable air-cooler solution, resulting in lower CAPEX and OPEX.
Optimize water usage, maximize cooling
All Alfa Laval hybrid heat exchanger systems are engineered to order and fully customized to fit your performance requirements and operating conditions perfectly. Alfa Laval HYAC is available in two different models: Single Zone (SZ) and Dual Zone (DZ).
3 hybrid air-cooler configurations
Alfa Laval HYAC systems are available in three different configurations with different capacity spans. All three configurations can be used for cooling fluids and gases, as well as condensing
Choose the right solution
Not sure which air-cooled heat exchanger is the right solution for you? Let us guide you through the different options.
