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Thermodynamic and phase behaviour of natural refrigerants embedded with nanostructured materials.

Number: pap. n. 233

Author(s) : BONDARENKO V., KULESHOV D., MAZUR V., et al.

Summary

Effect of nanoparticle doping on thermodynamic and phase behavior of natural refrigerants (hydrocarbons, ammonia, carbon dioxide) embedded with nanostructured materials is analyzed. The novel approach to study of nanostructured materials behaviour in disordered media is based on the idea of thermodynamic similarity of nano- and near-critical fluids that also exhibit enhanced thermal conductivity. It is hypothesized that the natural refrigerants with small impurities obey the corresponding state principle. Thermodynamic surfaces of reference fluid (natural refrigerant) and nanofluid with low nanoparticle volume concentration (<5%) are coincided in reduced form. The critical point shift of natural refrigerants (R717, R744, R600a) under nanoparticle doping is examined. The significant shift in critical density (up to 15%) and negligible critical temperature shift are predicted for the key natural refrigerants embedded with carbon nanotubes (CNT). The phase behaviour of mixtures due to critical parameter variation is studied via global phase diagram approach. Temperature glide control for the system R744–R41 with CNT is discussed.

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Pages: 8 p.

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Details

  • Original title: Thermodynamic and phase behaviour of natural refrigerants embedded with nanostructured materials.
  • Record ID : 30004540
  • Languages: English
  • Source: 10th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2012). Proceedings. Delft, The Netherlands, June 25-27, 2012.
  • Publication date: 2012/06/25

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