Abstract
Thermal energy storage (TES) is a key system to reduce the gap between energy supply and energy demands. Energy storage materials play a very important role in the design of TES. Energy storage materials store energy in form of sensible heat, latent heat and thermochemical energy storage. Compared to the various forms of energy storage, latent heat-based energy storage system can store a lot of energy at isothermal temperature during melting and can release the stored heat during solidification. Phase change material (PCM) includes organic, inorganic and eutectic materials. One of the primary disadvantages of PCMs is their very low thermal conductivity. This challenge could be overcome by the addition of high thermal conductive additives to form a composite. Thermo-physical property determination of these composites is very important to determine the feasibility of using such composites as energy storage materials. Characterisation techniques like differential scanning calorimetry (DSC), Fourier-transform infrared (FTIR), thermo-gravimetric analysis (TGA) and laser flash apparatus (LFA) are very effective and useful methods to determine the potential use of PCM in TES applications. This work offers the characteristics of pentaerythritol (PE) and D-Mannitol (DM) and the effect of adding high conductive graphene nanoplatelets (GnPs) to form a phase change composites. Thermal cycling is done to evaluate the thermal reliability of the composite after repeated melt/freeze cycles. Finally, the composite will be evaluated for its suitability of being used as a PCM in LHES systems.
Published Version
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