Data Centre Heat Effects Add Siting Risk For AI Campuses

Large AI data centers can raise nearby temperatures by as much as 16 degrees Fahrenheit, or about 8 degrees Celsius, Data Center Knowledge reported, citing researchers who examined how the facilities can create localized heat islands.

A separate Phoenix-area study found a smaller but still measurable effect across the surrounding area.

Data centers there raised overall local temperatures by about 4 degrees Fahrenheit, while air emitted directly from the facilities could be up to 25 degrees hotter.

The findings move the cooling debate beyond what happens inside the building.

Servers, storage systems and power equipment generate heat that must be carried away, and in many facilities that heat ultimately enters the surrounding air.

The effect is not presented as the same for every site.

The 16-degree figure came from work focused on large-scale AI data centers, and it remains unclear whether smaller facilities would raise local temperatures to the same extent.

Data centers are also only one source of localized warming.

Office buildings, paved surfaces and parked cars can all contribute to heat-island effects.

Dark-colored cars sitting in the sun can raise ambient temperatures by nearly 7 degrees Fahrenheit, according to the account.

Still, data center operators may face sharper scrutiny because new projects are already drawing more attention from local communities.

As more residents question the environmental effects of nearby facilities, temperature impacts can become part of the same discussion as cooling, siting and resource use.

Cooling design changes the size and location of the heat footprint.

Evaporative cooling uses moisture to extract and release heat, and can emit significant heat into the surrounding environment.

Liquid cooling can reduce the effect on ambient temperatures, especially when heated coolant is circulated through media such as the ground, where much of the heat can be absorbed.

The trade-off is cost: liquid cooling systems are significantly more expensive to install and operate.

Another option is to discharge heat into nearby bodies of water.

That can move heat away from the air around a facility, but it may warm the water instead and create a different environmental problem.

Data Center Knowledge noted that the approach may be more tolerable in warmer climates where aquatic life has already adapted to high water temperatures.

Operators can also reduce concentrated hot spots by spreading heated air or coolant across a wider area.

That method can be highly effective, but it requires infrastructure capable of distributing heat over dozens of miles, making it complex and costly.

For now, most data centers have limited practical options for keeping nearby ambient temperatures low.

Where local heat is a priority, mitigation is possible, but the available solutions depend on site conditions and require substantial spending.