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An advanced simulation model for direct expansion evaporator coils.

Author(s) : CONDE M. R.

Summary

State-of-the-art design procedures of direct expansion coils used as air cooling evaporators generally assume pure refrigerant and thermodynamic equilibrium between the phases inside the tubes. The thermodynamic nonequilibrium between the liquid and vapour phases has been experimentally observed in state-of-the-art evaporators. The effects of the presence of oil and of the thermodynamic nonequilibrium add up in reducing the temperature difference between the working fluid and the air, thus leading to lower evaporation pressures. The simulation model presented includes these two aspects. A computer program implementing this model has been developed and is a means to help improve evaporator design in the future.

Details

  • Original title: An advanced simulation model for direct expansion evaporator coils.
  • Record ID : 1998-0214
  • Languages: English
  • Source: Heat pumping technologies towards the next century: applications and markets. Proceedings of the 5th IEA Conference.
  • Publication date: 1996/09/22
  • Document available for consultation in the library of the IIR headquarters only.

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