Fluid Latent Heat Storage Material Using Ethanol Water Mixture

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  • OHKUBO Hidetoshi
    Department of Mechanical Engineering, Faculty of Engineering, Tamagawa University
  • YASUNARI Yuki
    Graduate School of Mechanical Engineering, Tamagawa University

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Other Title
  • エタノール‐水混合物質を利用した流動性のある潜熱蓄冷材
  • エタノール-水混合物質を利用した流動性のある潜熱蓄冷材
  • エタノール ミズ コンゴウ ブッシツ オ リヨウ シタ リュウドウセイ ノ アル センネツ チクレイザイ

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Description

Ethanol water mixture has a liquidus line ( or crystallizing line) and a solidus line (or melting line) that are separated, and therefore it can have both liquid and solid phases existing together. With advances in low temperature technology in recent days, ethanol water mixture is attaching more and more attention as an environment-friendly coolant or as a thermal storage material. In the present study, we observed the crystallization process in the mixture and carried out experiments to evaluate fluidity of the mixture, with the objective of utilizing an ethanol water mixture as a coolant or a thermal energy storage material. Crystal formation and growing process within a minute droplet of a binary mixture was modeled. As a result, we found a novel method to produce a fluid latent heat storage material continuously and an apparent coefficient of viscosity show that rotational speed and solid phase fraction have a strong effect on the fluidity of the mixture.

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