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Reverse heat transfer and re-condensation phenomena in non-adiabatic capillary tubes.

Author(s) : BANSAL P. K., YANG C.

Type of article: Article

Summary

A numerical simulation model for lateral capillary tube-suction line heat exchangers is presented here to analyse its performance characteristics in small vapour compression refrigeration systems (e.g. domestic refrigerators). Appropriate heat transfer correlations have been used to illustrate the reverse heat transfer and re-condensation phenomena inside the tubes. Some convergence problems were encountered during the execution of the model when lower vapour temperature inside the suction line caused the two-phase refrigerant inside the capillary tube to re-condense within the heat exchange region. Therefore, a relationship between the re-condensation phenomenon and the divergence problem has been analysed in the paper. The modelling was performed with two refrigerants, namely HFC-134a and HC-600a. Further, a simple theoretical equation has been developed to express the re-condensation phenomenon in non-adiabatic capillary tubes.

Details

  • Original title: Reverse heat transfer and re-condensation phenomena in non-adiabatic capillary tubes.
  • Record ID : 2006-0721
  • Languages: English
  • Source: Applied Thermal Engineering - vol. 25 - n. 17-18
  • Publication date: 2005/12

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