Supercooling characteristics of phase change material particles within phase change emulsions
Supercooling characteristics of phase change material particles within phase change emulsions
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DOI：
10.1016/j.ijrefrig.2018.11.039
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发表时间：
2019-03
影响因子：
3.9
通讯作者：
T. Morimoto;Y. Kawana;K. Saegusa;H. Kumano
中科院分区：
文献类型：
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作者：
T. Morimoto;Y. Kawana;K. Saegusa;H. Kumano
本研究基于PCE在实际应用中的假设，对恒温冷却PCE中PCM颗粒的过冷特性进行了实验研究。以正十六烷(熔点：291.35 K)和正十八烷(熔点：301.35 K)作为分散相变材料。以PCM的平均粒径和表面活性剂的种类为实验参数，对PCE进行了不同的过冷度和冷却时间。实验结果表明，用吐温80制备PCM时，PCM的平均粒径、过冷度和冷却时间都会影响PCM粒子的冻结率。当以吐温60或聚乙烯醇为表面活性剂(与PCM结构相似)制备PCE时，冷却时间对冻结率没有显著影响。
In this study, the supercooling characteristics of PCM particles in PCEs cooled at constant temperature were investigated experimentally, based on the assumed use of PCEs in practical applications. n-hexadecane (melting point: 291.35 K) and n-octadecane (melting point: 301.35 K) were used as the dispersed PCMs. The mean PCM particle diameter and surfactant type were varied as experimental parameters, and the PCEs were subjected to various supercooling degrees and cooling times. The experimental results showed that the mean PCM particle diameter, supercooling degree, and cooling time of the PCE affected the freezing ratio of the PCM particles, when the PCE was prepared with Tween 80. When the PCE was prepared with Tween 60 or polyvinyl alcohol as the surfactant (which had similar structures to the PCM), the cooling time did not significantly affect the freezing ratio.