9.2 Latent heat storage and phase change materials
3 min read•august 7, 2024
storage uses to store and release thermal energy during phase transitions. PCMs come in organic, inorganic, and eutectic varieties, each with unique properties like and .
Encapsulation techniques protect PCMs and improve their stability. strategies, like adding high-conductivity materials or optimizing geometry, boost energy storage and release rates. These innovations make PCMs a promising option for .
Phase Change Materials (PCMs)
Characteristics and Properties
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Store and release thermal energy during phase transitions at a constant temperature
Utilize the latent heat of fusion, the energy absorbed or released when a material changes phase between solid and liquid
Melting point is a critical property that determines the temperature at which the phase change occurs and energy is stored or released
Classified into (paraffins, ), (), and (combination of two or more PCMs)
Types of PCMs
Organic PCMs include paraffins (alkanes like octadecane) and fatty acids (palmitic acid, stearic acid)
Advantages: high latent heat, low , chemically stable, non-corrosive
Disadvantages: low , flammable
Inorganic PCMs primarily consist of salt hydrates (calcium chloride hexahydrate, sodium sulfate decahydrate)
Advantages: high latent heat, high thermal conductivity, non-flammable, low cost