Fun fact: Goldman Sachs HQ is cooled by an AC system that makes 1.7 million pounds of ice at night to “arbitrage [the] difference between on-and-off-peak electricity prices” (electricity is about 75% cheaper at night for commercial customers)https://www.aiche.org/chenected/2014/08/goldman-sachs-new-deep-freeze-energy-storage-system …
Got to tour it once it's exactly as wild as it sounds, and apparently quite efficient as well
