ESG Metrics, Reporting & Compliance

Gneuton Explains Why Closed Loop Cooling Is NOT What It Seems

AI

As AI continues to expand, hyper-scale data centers are emerging all across the United States. These massive facilities are certainly driving the digital economy, but while public attention mostly focuses on carbon emissions and renewable energy, a quieter crisis is quickly unfolding: fresh water.

The Fresh Water Cost of Power

The energy demands of AI infrastructure are growing faster than clean energy can scale. Wind, solar, and nuclear offer lower fresh water footprints, but none can meet the immediate rapid expansion of AI workloads. As a result, most AI data centers remain dependent on fossil fuel power, which consumes large volumes of fresh water.

Although the move to closed loop AI data center cooling systems has reduced direct fresh water withdrawals by recycling internal supply, they require 10 to 40 percent more electricity to operate. This additional energy demand shifts the fresh water burden upstream to the power plant, thereby relocating rather than resolving the environmental impact for local communities. It is also another factor driving consumer electricity prices much higher.

The Closed Loop Illusion

Closed loop cooling is definitely a meaningful improvement over traditional evaporative systems in hyper-scale AI data centers. It minimizes local fresh water consumption and is often promoted as a sustainable solution. Yet, the reality is more complex.

These systems rely on pumps, heat exchangers, and control mechanisms that draw substantial power. In most regions, that power comes from thermoelectric plants, which are among the largest consumers of fresh water in the country. The result is a hidden transfer of environmental cost, masked by clean technology branding, yet still absorbed by surrounding communities.

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