Cold Energy: This highlights the focus on storing opportunity energy in the shape of appreciably minimal temperatures. It's the counterpart into the higher-temperature energy saved in heat batteries. It can be compressed to 12 bar, heating back again nearly ambient temperature. It then enters the bottom of the hot tank. https://purethermal.co.uk/media-news/pure-thermal-webinar-can-icebat-cold-thermal-energy-storage-provide-an-alternative-cooling-design-option/