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Impact of oil presence on the evaporator enthalpy working with R1234ze(E) and R1234yf.

Author(s) : SUN Y., WEI Q., WANG J., WANG X., HE M.

Type of article: IJR article

Summary

R1234ze(E) and R1234yf, as green refrigerants, have received more and more attention in recent years. To better understand the performance of the evaporator working with a refrigerant/lubricating oil mixture, the solubilities of R1234ze(E)/POE85 and R1234yf/POE85 were measured using the isochoric saturation method in the temperature range from 278.15 K to 348.15 K. The NRTL model was used to correlate the new data. Using the new data, the pressure-enthalpy-vapor quality diagram and superheat-non-evaporation diagram were presented. The results show that the enthalpies of refrigerant/lubricating oil are always lower than those of pure refrigerant. The critical vapor quality is related to the refrigerant/oil solubility and oil circulation mass ratio. The enthalpy change ratio is directly proportional to the superheat and inversely proportional to the oil circulation mass fraction. The non-evaporation quality decreases as the superheat increases and increases as the mass fraction of oil circulation increases.

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Pages: 153-162

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Details

  • Original title: Impact of oil presence on the evaporator enthalpy working with R1234ze(E) and R1234yf.
  • Record ID : 30028706
  • Languages: English
  • Subject: HFCs alternatives
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - 129
  • Publication date: 2021/09
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2021.05.004
  • Available in the IIR library

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