Phase change materials (PCMs) generally offer high latent heats for a wide range of thermal energy storage technologies. As typical organic PCMs, polyethylene glycol (PEG) has been widely studied due to their high latent enthalpy, non-toxic and non-corrosive natures.
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In addition to providing a reference for the future application of GA/PEG-600 in the phase change energy storage field, this study establishes the basis for more effective
The thermal properties and thermodynamic data obtained in this work would be technically necessary and important for theoretically studying and actually using PEG as phase change materials for thermal energy applications.
Recently, the technique of thermal energy storage using phase change materials (PCMs) has intrigued a great deal of interests due to the PCMs are capable of storing/releasing thermal energy during the phase transition process at almost constant temperatures with the involved latent heats absorbed/released.
In the infrared thermography of ( Fig. 11 c), the heat storage capacity of the DW after adding 1.5 g PRP f (9.5) at room temperature was tested. The heat storage capacity of PEG can be maintained for about 20 min at its liquid–solid phase change temperature, which is 4 times higher than DW.
SEM and TEM results proved that PEG was well adsorbed even after the thermal cycle. The excellent chemical compatibility, thermal stability and durability of the ss-PCC were also beneficial for thermal energy storage applications such as building energy conservation and domestic hot water and heating systems.
The phase change enthalpies of GNS/PEG and Ag–GNS/PEG reach over 166.1 J/g because of the low content of GNS or Ag–GNS, which are not much different from pure PEG (185.3 J/g). These results indicate Ag–GNS/PEG composites have high thermal energy storage capacities to meet practical application requirements.
Moreover, the C es of the two composites exceeded 99%, indicating that PEG (greater than 99%) in both composites effectively performs the reversible phase transition with thermal management. Fig. 7. DSC curves of heating (a) and crystallization (b) of PEG, PP f (9.0), and PRP f (9.5).
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