It used to be the case that choosing the site for a new data center was based on three things: the availability of sufficient and affordable power, land and access to good optical fiber connections.
The need for land has not changed. But in the present era of high-performance computing, data center requirements arguably center on access to power, water (needed to cool the dense arrays of processors) and the relative ease or difficulty of gaining needed permission to proceed (permits, regulatory issues. ).
Goldman Sachs Research estimates that in 2027 a rack of artificial intelligence servers will require 500 kW of power, about 50 times more than a 2022 data center rack, which required between 5 kW and 15 kW of power.
Goldman Sachs Research further estimates that 40 percent of the increase in power demand from data centers will be met by renewables, including renewable natural gas. The bulk of the remaining 60 percent is expected to be driven by natural gas.
In 2024, natural gas supplied over 40 percent of the electricity for U.S. data centers. Towards 2030, the natural gas role is expected to increase, with major projects in development, such as Amazon's 754 MW natural gas plant in Mississippi and a 4.5-gigawatt campus in Pennsylvania.
To be sure, alternatives including small nuclear reactors are under development. But natural gas advantages are many, at least for U.S. data centers. The United States is the world’s largest producer of natural gas and has an extensive pipeline network. It’s an energy source that can be switched on and off easily to match demand and does not fluctuate in supply as do wind and solar energy sources.
Data center operators are looking at both on-grid and off-the-grid alternatives, including renewable natural gas and local generation.
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And use of renewable natural gas, in combination with other renewable sources (wind, solar, batteries) improves the economics of using renewable energy.
In July 2023 the Environmental Protection Agency noted there were 532 U.S. landfill-based renewable natural gas operations.
While natural gas has the lead in the United States today, the gains by renewable generation, as well as the expansion of nuclear generation using small modular reactors, are expected to cut into gas consumption.
Renewables are now projected to add 110 TWh to the domestic data center electricity supply between 2024 and 2030, according to the International Energy Agency .
Land, power and water remain the key physical requirements for new AI-focused data centers. Of these inputs, power and water see heightened importance.