Phase Change Materials: salt_hydrate
Phase change material (PCM) properties — melting point, latent heat, density, thermal conductivity, specific heat, and cycle life for paraffins, salt hydrates, fatty acids, and eutectics
| pcm category | material id | chemical formula | density liquid kg m3 (kg/m3) | density solid kg m3 (kg/m3) | latent heat kJ kg (kJ/kg) | material name | max cycles | melting point C (C) | notes | phase change type | specific heat liquid kJ kgK (kJ/kgK) | specific heat solid kJ kgK (kJ/kgK) | thermal conductivity liquid W mK (W/mK) | thermal conductivity solid W mK (W/mK) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| salt_hydrate | ba_oh2_8h2o | Ba(OH)2·8H2O | 1,937 | 2,070 | 265.7 | Barium Hydroxide Octahydrate | 500 | 78 | High latent heat; melting range 76-81.8°C; supercooling reduced by 1% CaF2; corrosive | solid-liquid | 2.63 | 1.34 | 0.653 | 1.255 |
| salt_hydrate | cacl2_6h2o | CaCl2·6H2O | 1,562 | 1,710 | 190.8 | Calcium Chloride Hexahydrate | 500 | 29 | Well-studied inorganic PCM; supercooling and phase separation are known issues; common nucleating agents: SrCl2·6H2O or BaCl2 | solid-liquid | 2.13 | 1.42 | 0.54 | 1.088 |
| salt_hydrate | kno3 | KNO3 | 1,900 | 2,110 | 91.6 | Potassium Nitrate | 1,000 | 334 | High-temperature inorganic PCM; used in solar thermal systems; thermally stable to 400°C | solid-liquid | 1.34 | 0.96 | 0.5 | 0.5 |
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