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Two-phase flow patterns in adiabatic refrigerant flow through capillary tubesLorbek, Luka, strojnik ...This paper presents the results of an experimental study of the flow visualization of the refrigerant R600a through a capillary tube with an internal diameter of 0.8 mm made from an FEP (fluorinated ... ethylene propylene) polymer that was installed in a small-scale vapor-compression refrigeration system. The main purpose of the study was to determine the flow patterns of the refrigerant flow in capillary tubes under different operating conditions and to verify whether the results obtained using an FEP tube are representative for the flow of a refrigerant in copper capillary tubes. The results of the study revealed that the two-phase refrigerant flow in the FEP capillary tubes consists predominantly of a heterogenous flow composed of slugs, which continuously expand downstream. It was also found that at higher inlet pressures the frequency at which the vapor inception occurs is higher than at lower pressures. In addition, an experimental study of the effect of local or global imperfections on the inner surface of the FEP tube was performed. In some cases, the imperfections increased the number of vapor bubble inception points, which caused a homogenization of the two-phase flow.Source: International journal of refrigeration = Revue internationale du froid. - ISSN 0140-7007 (Vol. 115, 2020, str. 107-116)Type of material - article, component part ; adult, seriousPublish date - 2020Language - englishCOBISS.SI-ID - 17060891
Author
Lorbek, Luka, strojnik |
Kuhelj, Anja, strojnica |
Dular, Matevž |
Kitanovski, Andrej
Topics
refrigeration |
vapor-compression system |
refrigerant flow |
capillary tube |
evaporation |
flow visualization |
hlajenje |
parno kompresijski sistem |
tok hladiva |
kapilara |
uparjanje |
vizualizacija toka
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source: International journal of refrigeration = Revue internationale du froid. - ISSN 0140-7007 (Vol. 115, 2020, str. 107-116)
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DRS, in which the journal is indexed
Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Lorbek, Luka, strojnik | 50586 |
Kuhelj, Anja, strojnica | ![]() |
Dular, Matevž | 23471 |
Kitanovski, Andrej | 18580 |
Source: Personal bibliographies
and: SICRIS
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