Fundamental research on storage process of ice/water mixtures for effective ice thermal energy storage

有效冰蓄热的冰/水混合物存储过程基础研究

• 批准号: 15560173
• 负责人: SAITO Akio
• 金额: $ 2.37万
• 依托单位: TOKYO INSTITUTE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15560173/
• 关键词: Ice Thermal Energy Storage; Ice Storage; Porous; Permeability; Compression; 水みち

The purpose of the research was to study how porous ice/water mixture changes its permeability during storage under the condition of melting point, and how those change vary with types of ice particles and compressive force. Experiments were performed using porous media constructed with sliced ice, semispherical ice and frazil ice, and the permeability of the samples were measured before and after storing the mixture in a tank where the samples were kept at 0℃. The sliced ice and compressed frazil ice increased the permeability by storing for 24 hours. However, the semispherical ice had no change. Morphology of the ice particle was investigated. Specific surface before and after the storage was measured. It was found that the morphology of ice particle changed by storing for 24 hours in 0℃ of water tank. The shape seems to be changed from rough surface into round and smooth, and the specific surface decreased. Kozeny constant was calculated using Kozeny Charman equation. It was found that the constant decreased and reached to a value for smooth sphere, independent on the porosity and the size of ice particles. Hence, it was concluded that transformation of sharp edges and rough surfaces on the particles into smoother surfaces causes the decrease in specific surface and Kozeny constant, and it leads to increase the permeability. Furthermore, study on compression was carried out. Time variation of height of ice packing was measured for each experiment. It was found that there is a correlation between viscosity of compression and porosity, and it is independent on time. Using the correlation, distribution of porosity and permeability in a large ice/water heat storage tank was estimated, and it was clarified that the total effective permeability changes with time and it differs from the value estimated using the average porosity.

本研究的目的是研究多孔冰/水混合物在熔点条件下储存过程中渗透性的变化，以及这种变化随冰粒类型和压缩压力的变化。实验使用了由切片冰、半球形冰和脆性冰组成的多孔介质，并在0℃的储罐中测量了样品储存前后的渗透率。切片冰和压缩脆冰通过储存24小时增加了渗透性。然而，半球形的冰层并没有变化。对冰粒的形态进行了研究。测定了贮存前后的比表面积。结果表明，在0℃水箱中放置24小时，冰粒的形态发生了变化。形状由粗糙表面变为圆滑，比表面积减小。用Kozeny-Charman方程计算了Kozeny常数。结果表明，随着冰粒大小和孔隙率的增大，该常数逐渐减小，并达到一个光滑球的值。因此，颗粒表面的锐边和粗糙表面转变为较光滑的表面会导致比表面积和Kozeny常数的减小，从而导致磁导率的增加。此外，还对其压缩性能进行了研究。每次实验都测量了冰芯高度随时间的变化。结果表明，压缩粘度与孔隙度之间存在一定的相关性，且与时间无关。利用该关联式对大型冰水蓄热罐的孔隙率和渗透率分布进行了估算，发现总有效渗透率随时间变化，与用平均孔隙率估算的值不同。

项目成果

Influence of Storage on Permeability of Ice/Water Mixtures

储存对冰/水混合物渗透性的影响

• 发表时间: 2004
• 期刊: Trans.of the JSRAE Vol.21, No.1
• 作者: Seiji OKAWA;Akio SAITO;Tasuku MAEDA;Tsutomu HOZUMI;Hiroyuki KUMANO
• 通讯作者: Hiroyuki KUMANO

大河誠司, 斎藤彬夫, Ari EIRIKSSON, 前田 祐, 宝積 勉, 熊野寛之: "貯蔵による細氷充填層の透過率変化"日本冷凍空調学会論文集. 20・3. 287-296 (2003)

Seiji Okawa、Akio Saito、Ari EIRIKSSON、Yu Maeda、Tsutomu Takarazumi、Hiroyuki Kumano：“由于储存而导致的薄冰填充床的透射率变化”日本制冷空调工程师学会论文集 20・3。 (2003)

貯蔵した氷の透過率変化に関する研究

蓄冰渗透率变化研究

• 发表时间: 2005
• 期刊: 第42回日本伝熱シンポジウム講演論文集
• 作者: 茂木勇悟

Change of Fluid Permeability of Ice/Water Mixtures due to Storage

冰/水混合物因储存而发生的流体渗透率变化

• 发表时间: 2004
• 期刊: Proc.of 2004 JSRAE Annual Conf. C201
• 作者: Seiji OKAWA;Akio SAITO;Tsutomu HOZUMI;Hiroyuki KUMANO
• 通讯作者: Hiroyuki KUMANO

貯蔵による細氷充填層の透過率変化

由于储存而导致的薄冰填充床的渗透性变化

• 发表时间: 2003
• 期刊: 日本冷凍空調学会論文集 20・3
• 作者: 大池敏彦;井上順広;五島正雄;大河誠司
• 通讯作者: 大河誠司