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<p>This study investigates the preparation of a bio-based shape-stabilized phase change material using date palm fronds (DPF) as a supporting matrix for thermal energy storage (TES) systems. Paraffin wax (PW) with a melting temperature in the range of 55.5–67.6&#xa0;°C was used as the phase change material (PCM). Several parameters such as part of DPF (petiole and stalk), particle size and type of impregnation were studied to evaluate the loading performance of paraffin into the DPF porous structure. Results showed that the petiole has a higher performance than the stalk, with a loading ratio of almost 76.5% obtained by vacuum impregnation. Despite the higher absorption quantity of PW in the direct mixing method, vacuum impregnation method provided more stable and rigid composites than the direct mixing method. Consequently, a particle size of 200 µm and vacuum impregnation yielded superior loading with a stable and rigid shape. The characterization of the obtained composites illustrates chemical compatibility between the DPF porous structure and PW, as demonstrated by Fourier Transform Infrared (FTIR) spectroscopy. Differential Scanning Calorimetry (DSC) characterization confirms the wax loading ratio of the petiole of almost 67% with thermal stability over many cycles. The resulting composite shows promising capacities to be integrated in a thermal energy storage system.</p>

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Experimental investigation for enhancement of thermal energy storage phase change material systems based on waste date palm fronds

  • 期刊论文

  • 发表日期：

    2025年8月14日

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  • Yasir Al-Hamadani,
  • Hanen Nouri,
  • Najoua Mekaddem,
  • Samia Ben-Ali

摘要

This study investigates the preparation of a bio-based shape-stabilized phase change material using date palm fronds (DPF) as a supporting matrix for thermal energy storage (TES) systems. Paraffin wax (PW) with a melting temperature in the range of 55.5–67.6 °C was used as the phase change material (PCM). Several parameters such as part of DPF (petiole and stalk), particle size and type of impregnation were studied to evaluate the loading performance of paraffin into the DPF porous structure. Results showed that the petiole has a higher performance than the stalk, with a loading ratio of almost 76.5% obtained by vacuum impregnation. Despite the higher absorption quantity of PW in the direct mixing method, vacuum impregnation method provided more stable and rigid composites than the direct mixing method. Consequently, a particle size of 200 µm and vacuum impregnation yielded superior loading with a stable and rigid shape. The characterization of the obtained composites illustrates chemical compatibility between the DPF porous structure and PW, as demonstrated by Fourier Transform Infrared (FTIR) spectroscopy. Differential Scanning Calorimetry (DSC) characterization confirms the wax loading ratio of the petiole of almost 67% with thermal stability over many cycles. The resulting composite shows promising capacities to be integrated in a thermal energy storage system.