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Kim Kenway, VP of Thermal Energy Storage of Maine, shows ice-based energy storage units in the Boothbay Harbor region, Maine. Photo: John Patriquin/Portland Press Herald via Getty Images

Commercial buildings account for nearly one third of U.S. total energy use. Roughly 25% of that third comes from air cooling, making it one of the main contributors to utility grid stress, especially in hot temperatures at peak times of the day.

Yes, but: Air cooling is also one of the easier electrical loads to shift to off-peak demand times. Thermal Energy Storage (TES) is an established technology that reduces grid stress by shifting cooling-energy use from high-peak periods, when demand and rates are highest, to off-peak periods, when rates are lower, and is becoming increasingly prevalent.

How it works: TES systems involve temporarily holding thermal energy in a hot or cold phase and releasing that energy for later on-demand use. Several U.S. companies use ice-based TES systems installed on rooftops: The ice is made with air conditioning equipment, integrated into the TES system at night — when demand for electricity is low — and then released to cool buildings, skyscrapers and other retail installations such as grocery stores to keep produce cold.

The benefits of TES depend on the customer and location. Commercial customers save on costly utilities rates during peak demand. For utilities, TES can alleviate the grid stress caused by air conditioning demand by shifting it to off-peak times, reducing the possibility for brown- or blackouts during heat waves.

What's new: The Massachusetts Department of Energy Resources recently awarded a contract to deploy ice-based TES capacity in Nantucket. The project is expected to deliver more than 1 megawatt of peak-demand reduction. This will enable the island to use air-cooling technology without investing in cabling to deliver power from the mainland.

What’s next: The DOE Energy Storage Database shows 114 installations in the U.S., for a total of 107,891 kilowatts of ice-based thermal energy as of 2017. By 2025, the global TES market is expected to grow to $12.5 billion.

Maggie Teliska is a technical specialist at Caldwell Intellectual Property Law, an intellectual property law firm. She is also a member of GLG, a platform connecting businesses with industry experts.

Go deeper

Updated 11 mins ago - World

U.S. threatens to cut aid to Sudan after military takeover

Sudanese Prime Minister Abdallah Hamdok during a 2020 news conference in Khartoum, Sudan. Photo: Mahmoud Hjaj/Anadolu Agency via Getty Images

Sudan's civilian Prime Minister Abdalla Hamdok was put under house arrest and several other ministers were detained Monday in what appears to be a military coup in the country, per local reports.

The latest: The head of the military faction of the Sudanese government, Gen. Abdul Fattah al-Burhan, said in a statement that he is announcing a state of emergency, suspending several parts of the interim constitution and dissolving the civilian government and interim sovereignty council — the highest governing body in the country.

Facebook's pivotal week

Illustration: Aïda Amer/Axios

They're battening down the hatches at Facebook headquarters this week as the company faces a trifecta of tumult: a continuing wave of negative press coverage fueled by document leaks, a critical earnings report Monday and a reported name change looming.

The big picture: All this is unfolding as Mark Zuckerberg tries to transform Facebook from a social network into the prime mover behind a new "metaverse" of VR- and AR-driven remote work and play.

3D-printed houses seem poised to go mainstream

A rendering of a planned 3D-printed, net-zero-energy community in Rancho Mirage, Calif. Photo: Mighty Buildings

3D-printed cement houses are about to take off, offering a cheaper, more efficient way to provide homes for those who need them — as long as they can be built in ways that don't worsen climate change.

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