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Developers are proposing to cool the Stratos data center using a combination of
closed-loop fluid chilling and
dry (air-based) cooling. According to the Utah Governor's Office and project developers, this setup is designed to prevent continuous water draw from the local environment.
Governor Cox (.gov) +1
The proposed cooling architecture relies on three primary components:
- Sealed Closed-Loop Recirculation:Cooling fluid will circulate entirely within sealed piping and equipment. It is never exposed to the outside air, meaning it will not evaporate. Developers plan to use existing on-site water rights for this initial fluid supply, using water that is otherwise too salty for human or agricultural use.
- Industrial Dry Air Coolers: To extract heat from the closed-loop system, the facility will utilize massive, air-cooled turbines and industrial-scale fans. This functions similarly to a giant car radiator, using ambient air rather than evaporating water to cool the internal piping.
- Subsurface Aquifer Dissipation:Developers have also considered piping hot water underground to utilize the deep aquifer beneath the Hansel Valley to naturally cool the system before the fluid is recycled back.
Governor Cox
The Environmental Controversy
Despite claims of near-zero water consumption, the cooling plan faces significant backlash. Local physics and climate experts argue that air-cooling a 9-gigawatt facility in a high-desert summer is highly inefficient. Critics note that it would require roughly
400 acres of industrial fans blowing constantly, which will generate immense noise and massive "heat islands"—potentially raising daytime valley temperatures by 2°F to 5°F and nighttime temperatures by up to 12°F.
Furthermore, despite the "closed-loop" designation, recent water rights filings show the facility will still need to periodically flush hot water out of the system, raising concerns about thermal pollution near the fragile Great Salt Lake ecosystem.