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Thermal characterization of double-phased secondary refrigerants: the case of paraffin slurry.

Caractérisation thermique des fluides frigoporteurs diphasiques : cas du coulis de paraffine.

Author(s) : HABERSCHILL P., SCHALBART P., MERCIER D., et al.

Summary

After having demonstrated thanks to a simple model its validity in energy terms, the behaviour of a new two-phase secondary refrigerant is analysed. It is stabilized paraffin slurry, made up of particles of polymer paraffin gel (75% paraffin) in suspension in water. A test bench was constructed. It made it possible to obtain local convection transfer coefficients in a rectangular channel. The results demonstrate that the exchange coefficients are clearly above those obtained with a single-phase fluid. Correlations showing the local or overall Nusselt number, according to the Reynolds number are proposed. The study of pressure loss demonstrates a behaviour similar to that of water with a slight rise in pressure loss when the two-phase secondary refrigerant is crystallized.

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Details

  • Original title: Caractérisation thermique des fluides frigoporteurs diphasiques : cas du coulis de paraffine.
  • Record ID : 2009-1668
  • Languages: French
  • Source: Scientific symposium: industrial cooling and thermodynamic systems. The Pôle Cristal meetings. [CD-ROM + 4 DVDs]. / Colloque scientifique : froid industriel et systèmes thermodynamiques. Les rendez-vous du Pôle Cristal. [CD-ROM + 4 DVD].
  • Publication date: 2008/10/09

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