Melting heat transfer characteristics of microencapsulated phase change material slurries with plural microcapsules having different diameters

Hideo Inaba; Myoung Kun Kim; Akihiko Horibe

doi:10.1115/1.1773584

Melting heat transfer characteristics of microencapsulated phase change material slurries with plural microcapsules having different diameters

Hideo Inaba, Myoung Kun Kim, Akihiko Horibe

Research output: Contribution to journal › Article › peer-review

104 Citations (Scopus)

Abstract

The present study has been performed for obtaining the heat transfer enhancement characteristics of the plural microencapsulated solid-liquid phase change materials (PCM) slurry having different sizes, which flows in a straight tube heated under a constant wall heat flux condition. In the turbulent flow region, the friction factor of the plural PCM slurry was found to be lower than that of pure water flow due to the drag reducing effect of the PCM slurry. The heat transfer coefficient of the plural PCMs slurry flow in the tube was increased by both effects of latent heat evolved in phase change process and microconvection around plural microcapsules with different diameters. The experimental results revealed that the average heat transfer coefficient of the plural PCMs slurry flow was about 2-2.8 times greater than that of a single phase of water.

Original language	English
Pages (from-to)	558-565
Number of pages	8
Journal	Journal of Heat Transfer
Volume	126
Issue number	4
DOIs	https://doi.org/10.1115/1.1773584
Publication status	Published - Aug 1 2004

Keywords

Forced convection
Heat transfer
Melting
Phase change
Spheres

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1115/1.1773584

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abstract = "The present study has been performed for obtaining the heat transfer enhancement characteristics of the plural microencapsulated solid-liquid phase change materials (PCM) slurry having different sizes, which flows in a straight tube heated under a constant wall heat flux condition. In the turbulent flow region, the friction factor of the plural PCM slurry was found to be lower than that of pure water flow due to the drag reducing effect of the PCM slurry. The heat transfer coefficient of the plural PCMs slurry flow in the tube was increased by both effects of latent heat evolved in phase change process and microconvection around plural microcapsules with different diameters. The experimental results revealed that the average heat transfer coefficient of the plural PCMs slurry flow was about 2-2.8 times greater than that of a single phase of water.",

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AU - Kim, Myoung Kun

AU - Horibe, Akihiko

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N2 - The present study has been performed for obtaining the heat transfer enhancement characteristics of the plural microencapsulated solid-liquid phase change materials (PCM) slurry having different sizes, which flows in a straight tube heated under a constant wall heat flux condition. In the turbulent flow region, the friction factor of the plural PCM slurry was found to be lower than that of pure water flow due to the drag reducing effect of the PCM slurry. The heat transfer coefficient of the plural PCMs slurry flow in the tube was increased by both effects of latent heat evolved in phase change process and microconvection around plural microcapsules with different diameters. The experimental results revealed that the average heat transfer coefficient of the plural PCMs slurry flow was about 2-2.8 times greater than that of a single phase of water.

AB - The present study has been performed for obtaining the heat transfer enhancement characteristics of the plural microencapsulated solid-liquid phase change materials (PCM) slurry having different sizes, which flows in a straight tube heated under a constant wall heat flux condition. In the turbulent flow region, the friction factor of the plural PCM slurry was found to be lower than that of pure water flow due to the drag reducing effect of the PCM slurry. The heat transfer coefficient of the plural PCMs slurry flow in the tube was increased by both effects of latent heat evolved in phase change process and microconvection around plural microcapsules with different diameters. The experimental results revealed that the average heat transfer coefficient of the plural PCMs slurry flow was about 2-2.8 times greater than that of a single phase of water.

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Melting heat transfer characteristics of microencapsulated phase change material slurries with plural microcapsules having different diameters

Abstract

Keywords

ASJC Scopus subject areas

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