Uploaded June 2024 | Updated September 2026, 2 weeks ago

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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: researchgate.net/publication/316893824_Preparation_and_thermal_properties_of_Glauber's_salt-based_phase-change_materials_for_Qinghai-Tibet_Plateau_solar_greenhouses

The key to reducing the melting point of a PCM is to make what is called a eutectic mixture ( en.wikipedia.org/wiki/Eutectic_system ). 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)

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Referenced videos:
Radiative Sky Cooling Playlist: youtube.com/playlist?list=PL1a2HkcVbmAWExiWT__qQypLEwkvijnIM
Reinventing Starlite: youtu.be/0IbWampaEcM?si=8mIY9GgNNKFdKsLG
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