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Study on emulsion including phase change nanoparticles as a heat storage material.

Number: pap. 047

Author(s) : FUMOTO K., SATO N., KAWAJI M., et al.

Summary

Recently, a great deal of attention has been paid to energy saving devices in place of conventional air-cooled and water-cooled devices. The thermal energy storage system that uses the latent heat of a phase change material (PCM) for air-conditioning or heating has recently become popular because it does not require high electric power and it saves energy. Therefore, a phase change emulsion (PCE) has been studied for its potential use as a functional fluid in thermal storage systems because of its high-energy storage capacity and transportability. The primary objective of the present study is to experimentally investigate both the heat transfer characteristics and the flow characteristics of the nanoemulsion flowing along a straight pipe. Tetradecane is utilized as the phase change material for the nanoemulsion. Tetradecane, which is type of n-alkane material, has a slightly higher melting point compared with water. Experimental investigation is carried out by considering specific parameters and features such as the nanoemulsion flow velocity, and heat flux of the heated surface. The relationships between the flow characteristics and specific parameters of the nanoemulsion are discussed in detail. As a result, an evaluation of the local heat transfer coefficient and the pressure drop indicate that the distribution of the local heat transfer coefficient and flow characteristics is strongly affected by both the tetradecane concentration and the flow velocity of the nanoemulsion. Moreover, the latent heat of fusion and the melting point of the nanoemulsion are investigated by differential scanning calorimetry (DSC).

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Pages: 8 p.

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Details

  • Original title: Study on emulsion including phase change nanoparticles as a heat storage material.
  • Record ID : 30005050
  • Languages: English
  • Source: 10th International Conference on Phase-Change Materials and Slurries for Refrigeration and Air Conditioning. Proceedings: Kobe, Japan, July 29-August 1, 2012.
  • Publication date: 2012/07/01

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