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Influence of encapsulate material thickness and its thermal conductivity on solidification time of phase change material in spherical capsule for cool thermal storage - A novel correlation
参考中译:包覆材料厚度及其导热系数对蓄冷球形胶囊相变材料凝固时间的影响--一种新的关联式

刊名：	International Communications in Heat and Mass Transfer
作者：	Kaiwalya Raj（Institute for Energy Studies, Anna University） Pandiyarajan Vellaichamy（Department of Chemical Engineering, Anna University） Meenakshi Chaturvedi（Institute for Energy Studies, Anna University） Velraj Ramalingam（Institute for Energy Studies, Anna University）
刊号：	725C0056
ISSN：	0735-1933
出版年：	2023
年卷期：	2023, vol.145, no.Pt.A
页码：	106803-1--106803-15
总页数：	15
分类号：	TK1
关键词：	Solidification time correlation；Inward solidification；Outward solidification；Thermal resistance analogy；Parametric study；Cool thermal energy storage
参考中译：	凝固时间关联；内向凝固；外向凝固；热阻比拟；参数研究；蓄冷
语种：	eng
文摘：	Buildings account for 39% of global GHG emissions. In any building, space cooling/heating consumes the maximum electricity. Recently, encapsulated phase change materials (PCMs)-based cool thermal energy storage (CTES) systems have gained huge attention due to its numerous advantages in meeting building space cooling demand. Energy is stored inside these capsules in the form of latent heat. Considering the relevance of PCM solidification in capsules, two novel correlations are proposed to determine the inward and outward solidification time of phase change material (PCM) inside/around a spherical capsule based on its thermal conductivity and thickness. Further, an experimental investigation is also performed to validate the correlation. The correlation agrees closely to the experiment with a maximum inaccuracy of around 6.6%. Thereafter, a parametric analysis is also carried out to analyse the impact of both the parameters on inward solidification time of PCM. The results showed a significant reduction in solidification time up to a capsule thermal conductivity value of 0.3 W/mK. Beyond 10 W/mK thermal conductivity, capsule thickness did not affect solidification. The incorporation of these correlations into software will benefit engineers working in the fields of CTES, refrigeration, food processing, and plastics industries.
参考中译：	建筑物排放的温室气体占全球排放量的39%。在任何建筑中，空间制冷/供暖都消耗最大的电力。近年来，基于包裹式相变材料的蓄冷系统因其在满足建筑空间供冷需求方面的诸多优势而受到广泛关注。能量以潜热的形式储存在这些胶囊内。考虑到相变材料在胶囊中凝固的相关性，提出了两个新的关联式来确定相变材料(PCM)在球形胶囊内和胶囊周围的内、外凝固时间。此外，还进行了实验研究，以验证这种相关性。这种关联式与实验非常吻合，最大误差约为6.6%。在此基础上，进行了参数分析，分析了这两个参数对相变材料内凝固时间的影响。结果表明，在胶囊导热系数为0.3W/mK时，固化时间显著缩短。超过10W/mK的导热系数时，胶囊厚度不影响固化。将这些相关性合并到软件中将使CTES、制冷、食品加工和塑料工业领域的工程师受益。