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Difference between the charged composition and the circulating composition of zeotropic blends in a refrigeration installation.

Author(s) : GOTH Y., CLAUSSE D., GHASSEMPOURI J.

Summary

Among HFC candidates to the replacement of the R22, those whose evaporating curve is closer to that of R22 are zeotropic blends. In a zeotropic blend in thermodynamic equilibrium, compositions of liquid and vapour phases are different. This phenomenon, associated with the gas-liquid slip ratio in heat exchangers leads to a difference between the composition of the charged fluid and the composition of the circulating fluid. The article presents the details of a static model of a vapour compression refrigeration system that calculates this change of circulating composition. The system is composed of a compressor, an evaporator, a condenser and high and low pressure liquid accumulators. The model is based on the equation of mass conservation in system. It takes into account the effect of the fractionation and the gas-liquid slip ratio between phases in heat exchangers.

Details

  • Original title: Difference between the charged composition and the circulating composition of zeotropic blends in a refrigeration installation.
  • Record ID : 2000-0040
  • Languages: English
  • Source: Heat transfer in condensation and evaporation: application to industrial and environmental processes. Preprints of the EUROTHERM Seminar 62.
  • Publication date: 1998/11/17
  • Document available for consultation in the library of the IIR headquarters only.

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