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Heat transfer performance of the blend R32/R1234ze(E).

Analisi delle prestazioni dello scambio termico per la miscela R32/R1234ze(E).

Author(s) : DEL COL D., AZZOLIN M., BORTOLIN S.

Type of article: Article

Summary

In the recent years much attention has been paid to the use of fluorinated propene isomers for the substitution of high-GWP refrigerants in refrigeration and air conditioning applications. However, the HFOs (hydrofluoroolefins) cannot cover all the applications due to their thermodynamic properties. For the purpose to get a fluid that brings together the good characteristics of some HFCs, such as R410A, and the low GWP of HFOs, in the latest literature it was attempted to blend R1234ze(E) with another refrigerant, R32. R32 has relatively low GWP and excellent thermodynamic characteristics. In this paper, a mixture of R1234ze(E) and R32 is investigated. In particular the frictional pressure gradient and the local heat transfer coefficients during flow boiling and condensation of this mixture in a single channel are measured. Tests are carried out in the experimental apparatus available at the Two Phase Heat Transfer Lab of the University of Padova. The experimental data are also compared to heat transfer data of the pure components R1234ze(E) and R32. This allows to analyze the heat transfer penalization due to the mass transfer resistance of this zeotropic mixture.

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Format PDF

Pages: 26-28

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Details

  • Original title: Analisi delle prestazioni dello scambio termico per la miscela R32/R1234ze(E).
  • Record ID : 30018271
  • Languages: Italian
  • Source: Industria & Formazione - vol. 39 - n.394
  • Publication date: 2015/10

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