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The most useful resource I found while investigating phase change materials was the following paper which explores several different types of low temp salt based PCMs: [ Ссылка ]

The key to reducing the melting point of a PCM is to make what is called a eutectic mixture ( [ Ссылка ] ). In this case that is a mixture of two different hydrated salts. When the two come together the freezing point of both is lowered to a temperature which depends on the particular salts used and the ratio between them. Sodium sulfate and table salt (sodium chloride)

Here is my Amazon storefront containing affiliate links for some of the items used in this project: [ Ссылка ]

Below are ebay affiliate links (I will receive a small commission if you make purchases through affiliate links):

Sodium sulfate: [ Ссылка ]
Calcium chloride: [ Ссылка ]
Ice pack cooling vest: [ Ссылка ]
Sodium acetate hot packs: [ Ссылка ]
Reusable silicone bags: [ Ссылка ]

Referenced videos:
Radiative Sky Cooling Playlist: [ Ссылка ]
Reinventing Starlite: [ Ссылка ]
Solar balloons: [ Ссылка ]
Wax fabric: [ Ссылка ]
Second channel: [ Ссылка ]

A special thank you to my top patrons:
Aik193, Chris, Christian, Damián Arrillaga, Daniel Moore, Dustin B , Eugene Pakhomov, Evan Hughes, Evan Relf, Gusbear, Jedediah Kivi, Jonathan Wilt, Iain Rei, Josh Hoppes, Mark Roth, Matthew, Matthias S., Michel Pastor, Nick Gerner, PabloXIII, Parker Jones, Peter Gordon, PeteyPak, Sam Hodge, Santiago Perez, Simone Chiesi, Syniurge, Teague Lasser, WilSkarlet, Yanko Yankulov, Alvaro Figueroa

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