Wet/dry auxiliary cooling system for 1,100 MW power plant

How do you combine wet/dry auxiliary cooling systems in extreme environments? In North Las Vegas, Chuck Lenzie Generating Station uses the Alfa Laval Niagara Wet Surface Air Cooler (WSAC) wet/dry system solution to meet the challenge in this hot, dry location. See more details on how our wet/dry system can maximize water conservation.

DATUM 2018-03-08

Customer: Chuck Lenzie Generating Station

Location: North Las Vegas, Nevada

Application: Auxiliary cooling

The challenge: Cooling the closed loop auxiliary water while conserving makeup water based on allowed annual estimates of maximum water availability.

The solution: Considering annual weather data and water availability it was decided to design a wet/dry system to operate dry below 80ºF ambient and wet/dry above 80ºF ambient to achieve the site water limitations. The resulting solution reduced the site’s water consumption to only seven percent of a conventional water only solution.


  • Ability to achieve the aux cooling water temperature needed even at the hottest summer periods of over 100ºF ambient while still staying within the extreme water limitations.
  • Simultaneous design of both the wet and dry side of the system.