Journal
Scientific journal NRU ITMO. Series "Refrigeration and Air Conditioning"
UDK621.56
Issue:4 (20)
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Development of the card of the modes of boiling of R134a, R12, R22, NH3, air-and-water mixes and water in channels with a diameter of 6 mm
Annotation
This article presents the results of experimental studies of flow regimes of two-phase flow of refrigerant R134a, R22 in horizontal pipes an internal diameter of 6 mm. During the research was obtained the dependence of the boundaries of the two-phase flow regimes flow of refrigerant R134a, R22 on the speed of the mixture wсм at a temperature of t0 = +20ºС and a diameter d0 = 6 mm. On the basis of a comparison of the experimental data with these diagrams as Zana, Dempsey, Gardienko, Avdeyev, Hugerdona, Malyshev was built a map of boiling regimes, that integrates together data on refrigerants such as R134a, R12, R22, NH3; water-air mixture and water in makro channels d0> 5mm. It was found that 90% of the obtained experimental data are consistent with the above listed charts.
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