Development of Composite Microencapsulated Phase Change Materials for Multi-Temperature Thermal Energy Storage
Development of Composite Microencapsulated Phase Change Materials for Multi-Temperature Thermal Energy Storage
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DOI：
10.3390/cryst13081167
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发表时间：
2023-07
期刊：
影响因子：
2.7
通讯作者：
Weiguang Su;J. Darkwa;T. Zhou;D. Du;G. Kokogiannakis;Yilin Li;Li Wang;Liying Gao
中科院分区：
文献类型：
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作者：
Weiguang Su;J. Darkwa;T. Zhou;D. Du;G. Kokogiannakis;Yilin Li;Li Wang;Liying Gao
相变储能材料被认为是平衡建筑冷热需求的潜在节能材料。然而，具有单一相变温度的单个相变材料（PCM）不能适应不同的温度要求。为此，已经提出了制造不同种类的微胶囊化PCM（MEPCM）并将它们组合以形成用于建筑物中的多季节应用的多相变化材料（MPCM）的概念。为了证明这一想法的可行性，三种MEPCM制造和用于三种不同的复合MPCM的发展，分类为MPCM-1，MPCM-2，和MPCM-3。结果分析表明，每个MPCM样品能够在两个不同的温度下释放潜热，从而使它们适合于多温度热能存储应用。然而，发现MPCM的相变温度与MEPCM样品相比略微降低0.09-0.31 °C。与理论值相比，MPCM的测量储能容量也降低了6.3-11.4%，但它们显示出高达197.8-218.8 °C的相对良好的热稳定性行为。进一步确定了MPCM的相变温度和潜热归因于各个组分的重量百分比，因为三种MPCM样品的理论值与测量值都很好地一致。因此，根据特定的气候条件优化MPCM样品中MEPCM的重量比及其相应的热物理性质将是未来研究中必须采取的步骤。MPCM的热性能增强也被建议作为进一步研究的重要组成部分。
Phase change energy storage materials have been recognized as potential energy-saving materials for balancing cooling and heating demands in buildings. However, individual phase change materials (PCM) with single phase change temperature cannot be adapted to different temperature requirements. To this end, the concept of fabricating different kinds of microencapsulated PCM (MEPCM) and combing them to form a multiphase change material (MPCM) for multi-seasonal applications in buildings has been proposed. To prove the feasibility of this idea, three kinds of MEPCMs were fabricated and used for the development of three different composite MPCMs, classified as MPCM-1, MPCM-2, and MPCM-3. Analysis of the results shows that each MPCM sample was able to release latent heat at two different temperatures thus making them suitable for multi-temperature thermal energy storage applications. The phase change temperatures of the MPCMs were however found to be slightly reduced by 0.09–0.31 °C as compared with the MEPCMs samples. The measured energy storage capacities for the MPCMs were also reduced in the range of 6.3–11.4% as compared with the theoretical values but they displayed relatively good thermal stability behaviour of up to 197.8–218.8 °C. It was further identified that the phase change temperatures and latent heat of the MPCM was attributed to the weight percentages of individual components, as the theoretical values for the three MPCM samples were all in good accordance with the measured values. Therefore, optimizing the weight ratios of the MEPCM in MPCM samples and their corresponding thermophysical properties based on specific climatic conditions would be a necessary step to take in future investigations. Thermal performance enhancement of the MPCM is also being recommended as an essential part of further research.