Heat Transfer Characteristics of Thermal Storage Particle-Water Slurry in a Capillary

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  • Tokanai Hideki
    Department of Chemistry and Chemical Engineering, Faculty of Engineering, Yamagata University
  • Harada Eiji
    Department of Chemistry and Chemical Engineering, Faculty of Engineering, Yamagata University
  • Kuriyama Masafumi
    Department of Chemistry and Chemical Engineering, Faculty of Engineering, Yamagata University

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Other Title
  • 蓄熱微粒子‐水系スラリーのキャピラリー内伝熱特性
  • 蓄熱微粒子-水系スラリーのキャピラリー内伝熱特性
  • チクネツ ビリュウシ スイケイ スラリー ノ キャピラリーナイ デンネツ トクセイ

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Abstract

An experimental investigation was performed to clarify the heat transfer characteristics of thermal storage particle–water slurry in which micro-capsulated phase-change particles were dispersed in water through a capillary. First, the physical properties including density, thermal conductivity and specific heat of thermal storage particles were evaluated by measuring the physical properties of the slurry. From flow experiments in a capillary, it was confirmed that the thermal storage particle slurries was a power-law fluids, and the apparent viscosity of the slurries was a obtained.<br>Next, heat transfer experiments were carried out for the slurry in the capillary. As a result, the heat transfer coefficient under the phase-change condition was found to increase up to twice the value under the non-phase-change condition. By use of appropriate properties to define the non-dimensional parameters, it was found that the heat transfer coefficients of slurry were expressed well by the empirical correlation commonly used.

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