By Stephen Lester.
A recent article in the Washington Post painted a very clear picture of the enormous amount of energy being used by data centers to fuel the exploding world of Artificial Intelligence (AI). According to the article, roughly 25% of all Americans have used ChatGPT (an artificial intelligence chatbot developed by OpenAI) since it was released in 2022. These chatbots use massive amounts of energy to respond to questions on-line. Keeping these computers operating means keeping them cool and that is taking a significant toll on the environment.
Two often cited concerns are the massive amounts of water and electricity that these data centers require, not to mention the strain on the local infrastructure that results from the increased demands. Working with researchers from the University of California at Riverside, the Washington Post estimated how much water and energy OpenAI’s ChatGPT uses to write the average 100-word email.
Water used to generate a single 100-word AI response:
Once: Requires 519 milliliters of water, a little more than 1 bottle.
Once weekly for a year: Requires 27 liters, about 1.43 water cooler jugs.
Once weekly for a year by 1 out of 10 Americans (roughly 16 million people): Requires 435,235,476 liters, equal to the water consumed by all of Rhode Island households for 1.5 days.
Energy used to generate a single 100-word AI response:
Once: Requires 0.14 kilowatt-hours (kWh) of electricity, equal to powering 14 LED light bulbs for 1 hour.
Once Weekly for a year: Requires 7.5 kWh, equal to the electricity consumed by 9.3 Washington, DC households for 1 hour.
Once weekly for a year by 1 out of 10 working Americans: Requires 121,517 megawatt-hours (MWh), equal to the electricity consumed by all Washington, DC households for 20 days.
The computers used to generate an AI response run through “thousands of calculations to determine the best words to use in a response.” This process generates a great deal of heat. According to the article, water is usually used to cool these computers, typically housed in data centers that are cropping up all over the country because of the exploding demand for AI. “Water transports the heat generated in the data centers into cooling towers to help it escape the building, similar to how the human body uses sweat to keep cool.”
According to the Post article, where electricity is cheaper or where water is scarce, electricity is often used to cool the computers using large air-conditioning-like units. You might see this in Arizona, southern California, Georgia or anywhere in the southern half of the United States. As a result, large portions of the country are suddenly developing a growing need for electricity that’s not necessarily readily available. Another Washington Post article describes energy demand in Georgia reaching record highs and the Arizona Public Service, the largest utility in the state, struggling to keep up with energy demand, projecting it will run out of transmission capacity by the end of the decade. Similar energy challenges are playing out in Northern Virginia, Texas and other places where these data centers are being built.
This growing demand for electricity has triggered lots of push back from local communities that are unsure whether they want these data centers. Concerns have been raised about the noise generated by these centers as well as the enormous amount of water and electricity they use. Questions have been raised about who gets the electricity from the grid and how is it paid for. Some local residents worry that their electric bill will go up to help subsidize the cost of meeting the increased need for electricity.
This search for energy prompted Microsoft to reach out to the Constellation Energy, a large energy company that owns the closed Three Mile Island Nuclear Power (TMI) plant near Harrisburg, PA, the site of the worst nuclear accident in US history. One of the two reactors at the site (Unit #2) suffered a partial meltdown and has remain closed since 1979. The second reactor (Unit #1) was shut down five years ago. Microsoft reached an agreement with Constellation to purchase all of the energy generated by Unit #1 at TMI for 20 years. Constellation described this as ”it’s largest ever power purchase agreement. The reactor is set to open in 2028 pending approval by the Nuclear Regulatory Commission.
The agreement between Microsoft and Constellation said nothing about what’s going to happen to the radioactive waste generated by this power plant. There still is no permanent repository for this waste. Instead, it is being stored at over 70 operating and shuttered nuclear plants around the country.
The growing demand for electricity driven by the booming fields of artificial intelligence and cloud computing is here to stay. These proliferating data centers are going to require unprecedented amounts of energy and water. Where that comes from remains to be seen, but you can be sure the tech companies will do everything in their power to get what they need, even if it means reopening a dead nuclear power plant.le that will put extra demands for housing, transportation and other essentials for an expected growing population?