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Thermal characterization of two-phase refrigerants: the case of paraffin slurries.

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

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

Type of article: Article

Summary

Having shown by means of a simple model its energy interest, the thermal behaviour of a new two-phase secondary fluid (TPSF) is analysed. It concerns a stabilized paraffin slurry composed of particles of paraffin gelified with polymer (75% paraffin) suspended in water. A test bench was built. It makes it possible to obtain the local heat transfer coefficient in a rectangular channel. The results show that the heat transfer coefficients are markedly higher than the heat transfer coefficients obtained with a single phase fluid. Correlations giving the local or overall Nusselt number according to the Reynolds number are proposed. The study of the pressure loss demonstrates a behaviour similar to that of pure water with a slight increase in pressure loss when the TPSF is crystallized.

Details

  • Original title: Caractérisation thermique des fluides frigoporteurs diphasiques : cas du coulis de paraffine.
  • Record ID : 2010-0804
  • Languages: French
  • Source: Revue générale du Froid & du Conditionnement d'air - vol. 100 - n. 1102
  • Publication date: 2010/04

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