The speed of energy exchange from your phase change product and the heat transfer fluid (or create) is in correlation to the primary difference in enthalpy involving the two substances and the floor location exactly where energy Trade can take place. A patented cold thermal energy storage program from O-Hx https://purethermal.co.uk/media-news/pure-thermal-webinar-can-icebat-cold-thermal-energy-storage-provide-an-alternative-cooling-design-option/