Study on formation of high-performance ice slurry made from W/O type emulsion in ice storage system

W/O型乳液在蓄冰系统中形成高性能冰浆的研究

基本信息

批准号：
16560195
负责人：
MATSUMOTO Koji
金额：
$ 2.37万
依托单位：
Chuo University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2005
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16560195/
关键词：
Ice storage system W O type emulsion amino group modified silicone oil Thermal storage material Ice slurry Ice adhesion Composition rate of water and oil Dissolution of super-cooling エマルション潜熱蓄熱材金属容器内製氷

项目摘要

This study is focuses on an emulsion as a new thermal storage material for ice storage. Two types of emulsions were formed using an oil-water mixture with a small amount of additive. A silicone, light and lump oils were used. The water contents of the emulsions were 70, 80 and 90%. The additive was an amino group modified silicone oil. No depression of freezing point was observed for the emulsions because of their hydrophobic properties. In order to determine the structure of the emulsions, their electrical resistances were measured. Moreover, components of the liquids separating from the emulsions were analyzed. The results indicated that one emulsion was a W/O type emulsion, while the other was the O/W type. Finally, adaptability of the two emulsions to ice storage was discussed, it was concluded that a high performance ice slurry could be formed by the W/O type emulsion and the W/O emulsions silicone oil(7:3), light oil(7:3) and lump oil(9:1) exhibited the best ice formation.However, for the W/O emulsion with over 70% water content the dissolution process of supercooling was very unique. Therefore, the process was investigated from the view of temperature history and dissolution rate of supercooling, and it was found that dissolution rate of supercooling of the emulsion was much slower. Moreover, the time required to dissolve supercooling was measured, varying the composition ratio water to silicone oil. From the experimental results, it was found that longer time to dissolve supercooling in the case of (8:2) with higher viscosity was required compared with the case of (7:3) with lower viscosity. In the case of (9:1) with the highest viscosity ice adhesion to the cooling wall occurred.

这项研究的重点是乳液作为用于冰储存的新的热储存材料。使用少量添加剂的油水混合物形成了两种类型的乳液。使用了硅胶，轻质和块状油。乳液的水含量为70％，80％和90％。添加剂是氨基改性硅油。由于乳液的疏水性质，没有观察到冻结点的抑郁症。为了确定乳液的结构，测量了其电阻。此外，分析了与乳液分离的液体的成分。结果表明一种乳液是带有乳液的乳液，而另一种是O/W类型。最后，讨论了两种乳液对冰储存的适应能力，得出的结论是，高性能的冰浆可以由W/O型乳液和W/O乳液硅油（7：3），淡油（7：3），液化油（7：3）和块状油（9：1）形成最佳冰层，以供应量为70％的properation profess。因此，从温度病史和过冷的溶解速率的角度研究了该过程，发现乳液过冷的溶解速率要慢得多。此外，测量了溶解过冷所需的时间，从而改变了组成比水与硅油。从实验结果中可以发现，与（7：3）的情况相比，（8：2）的溶解超冷的时间更长，粘度较高，粘度较低。在（9：1）的情况下，粘度最高的冰粘附在冷却壁上。