chemical composition and phase transition behavior. Most reviews distinguish three broad groups - organic, inorganic and eutectic PCMs - and, more recently, composite and microencapsulated PCMs are considered as separate subclasses because they are specifically engineered to overcome drawbacks such as low thermal conductivity, leakage and phase segregation.

Organic PCMs

Organic PCMs are mainly based on paraffin waxes (linear alkanes) and non-paraffin organics such as fatty acids, fatty

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