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- Title
Two-phase flow dynamics during boiling of R134a refrigerant in minichannels.
- Authors
Khovalyg, D.; Baranenko, A.
- Abstract
This study is devoted to complex experimental investigation of two-phase flow boiling of R134a refrigerant in a minichannel having a hydraulic diameter of 540 μm at heat fluxes up to 70 kW/m and mass fluxes up to 700 kg/(m s). Flow regimes, pressure drop, heat transfer coefficient, and behavior of instabilities are analyzed as functions of vapor quality. On the basis of experimental data, the methods for calculating two-phase pressure drop in a minichannel with a diameter of about 500 μm are determined, and new correlation is proposed for estimating the heat-transfer coefficient; the region of stable boiling of the refrigerant is also determined.
- Subjects
TWO-phase flow; FLUID dynamics; REFRIGERANTS; THERMAL stability; FLUID flow
- Publication
Technical Physics, 2015, Vol 60, Issue 3, p350
- ISSN
1063-7842
- Publication type
Article
- DOI
10.1134/S1063784215030123