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Study on heat transfer characteristics of PCM slurry of super-hydrophobic gel particles adsorbing paraffin.

Number: 1942

Author(s) : OTSUBO T., MIYATA N., IWAYA M., ENDO M., NISHIO N., HIDEMA R., SUZUKI H.

Summary

In order to prevent hydrophobic phase change materials (PCM) from phase separation in water, a novel technique using super-hydrophobic gel named "marshmallow-like gel" was suggested. Marshmallow-like gel doesn't adsorb hydrophilic substances, but hydrophobic substances. In this study, the particles of marshmallow-like gel were used as a carrier of paraffin, which is a kind of hydrophobic PCM, in the heat transportation medium of water. As a dispersant for the super-hydrophobic gel, sodium carboxymethyl cellulose (CMC) was used in water. The concentration of CMC was set at 0.6 wt%, while the concentration of the gel containing paraffin was set at 1 O wt%, and the heat transfer characteristics of the slurry were measured in a test pipe with the diameter of 8 mm. The heat transfer coefficients were compared with the results of CMC solution without the particles. From this study, it was found that the particles with hydrophobic PCM have the positive effects on the heat transfer characteristics.

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Pages: 8

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Details

  • Original title: Study on heat transfer characteristics of PCM slurry of super-hydrophobic gel particles adsorbing paraffin.
  • Record ID : 30028847
  • Languages: English
  • Source: 13rd IIR Conference on Phase-Change Materials and Slurries for Refrigeration and Air Conditioning. Proceedings: (online) Vicenza, Italy, September 1-3, 2021.
  • Publication date: 2021/09/01
  • DOI: http://dx.doi.org/10.18462/iir.PCM.2021.1942
  • Document available for consultation in the library of the IIR headquarters only.

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