Metal foam/PCM melting evolution analysis: Orientation and morphology effects

Multifunctional phase change composites based on biomass/MXene-derived hybrid scaffolds for excellent electromagnetic interference shielding and superior solar/electro-thermal energy storage

Shape-stable composite phase change materials encapsulated by bio-based balsa wood for thermal energy storage

Thermal therapy based on phase change materials (PCMs) has broad application prospects in the field of personal thermal care. Herein, a serious of EPDM/MXene/PW (EMP) based shape-stable phase change composites (SSPCCs) with excellent flexibility was prepared in large scale via water-assisted melt blending. The MXene nanosheets were dispersed well in the EPDM matrix during the melt blending processes with the assistance of water. With the introduction of a small amount of MXene nanosheets (only 0.8 wt%), the light-to-thermal conversion efficiency of SSPCCs were improved obviously. The melting phase change enthalpy and freezing phase change enthalpy of EMP-0.8 are about 120 J/g and 115 J/g, respectively. And after 200 times thermal cycles and 25 times light-thermal cycles, the phase change enthalpy of obtained EMP-0.8 SSPCC hardly changes. All the results show that the obtained EMP based SSPCCs can be fully utilized in the field of personal thermal therapy. 

Large-scale fabrication of flexible EPDM/MXene/PW phase change composites with excellent light-to-thermal conversion efficiency via water-assisted melt blending

Thermal therapy based on phase change materials (PCMs) has broad application prospects in the field of personal thermal care. Herein, a serious of EPDM/MXene/PW (EMP) based shape-stable phase change composites (SSPCCs) with excellent flexibility was prepared in large scale via water-assisted melt blending. The MXene nanosheets were dispersed well in the EPDM matrix during the melt blending processes with the assistance of water. With the introduction of a small amount of MXene nanosheets (only 0.8 wt%), the light-to-thermal conversion efficiency of SSPCCs were improved obviously. The melting phase change enthalpy and freezing phase change enthalpy of EMP-0.8 are about 120 J/g and 115 J/g, respectively. And after 200 times thermal cycles and 25 times light-thermal cycles, the phase change enthalpy of obtained EMP-0.8 SSPCC hardly changes. All the results show that the obtained EMP based SSPCCs can be fully utilized in the field of personal thermal therapy.

Latent heat thermal energy storage (LHTES) uses phase change materials (PCMs) to store and release heat, and can effectively address the mismatch between energy supply and demand. However, it suffers from low thermal conductivity and the leakage problem. One of the solutions is integrating porous supports and PCMs to fabricate shape-stabilized phase change materials (ss-PCMs). The phase change heat transfer in porous ss-PCMs is of fundamental importance for determining thermal-fluidic behaviours and evaluating LHTES system performance. This paper reviews the recent experimental and numerical investigations on phase change heat transfer in porous ss-PCMs. Materials, methods, apparatuses and significant outcomes are included in the section of experimental studies and it is found that paraffin and metal foam are the most used PCM and porous support respectively in the current researches. Numerical advances are reviewed from the aspect of different simulation methods. Compared to representative elementary volume (REV)-scale simulation, the pore-scale simulation can provide extra flow and heat transfer characteristics in pores, exhibiting great potential for the simulation of mesoporous, microporous and hierarchical porous materials. Moreover, there exists a research gap between phase change heat transfer and material preparation. Finally, this review outlooks the future research topics of phase change heat transfer in porous ss-PCMs.

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Limei Tian

Papers

A review of phase change heat transfer in shape-stabilized phase change materials (ss-PCMs) based on porous supports for thermal energy storage