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.

该研究的目的是研究多孔冰/水混合物如何在熔点条件下储存过程中的渗透性改变，以及它们如何随冰颗粒和压缩力的类型而变化。使用用切片冰，半球冰和弗拉西冰构建的多孔介质进行实验，并在将混合物储存在样品保持在0℃的水箱中之前和之后测量样品的渗透性。压缩的Frazil冰通过存储24小时来提高渗透率。但是，半球形冰没有变化。研究了冰颗粒的形态。测量存储前后的特定表面。发现冰颗粒的形态通过在水箱0℃中存储24小时而变化。形状似乎从粗糙的表面变为圆形和光滑，并且比表面降低。使用Kozeny Charman方程计算Kozeny常数。发现常数下降并达到平滑球的值，独立于冰块和冰颗粒的尺寸。因此，得出的结论是，颗粒上锋利的边缘和粗糙表面变为光滑表面会导致特定表面和kozeny常数的减小，这会增加渗透率。此外，对压缩进行了研究。对于每个实验，都测量了冰袋高度的时间变化。发现压缩和孔隙率的粘度之间存在相关性，并且它是独立的。使用相关性，估计了大冰/水热储罐中孔隙率和渗透率的分布，并澄清说，总有效渗透性随时间变化，与使用平均孔隙率估计的值不同。

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