Ice battery system is being used to cool buildings and lower energy costs

https://www.cbsnews.com/news/innovative-ice-battery-system-cool-buildings-lower-energy-costs/

"New York's Eleven Madison skyscraper air-conditioned using about 500K pounds of ice created every night when cost is low... then, during day when price is high, building cooled with previous night's ice, lowering cooling costs up to 40%... buildings won't need to draw from peaker plants... new materials that don't need to get as cold as ice, but can still keep buildings cool... water, add other elements/ molecules, control that temperature basically anywhere we want it, in the zero to 20°C range... cool homes"

Related:

Biodegradable film lowers building energy use by up to 20% and keep surfaces up to 9.2°C cooler
https://www.aol.com/news/biodegradable-film-could-save-20-090153287.html

Ice-cooled buildings could ease strain on power grid
https://techxplore.com/news/2025-08-ice-cooled-ease-strain-power.html