Open AccessExperimental study of critical heat flux at flow boiling of R125 in small diameter channel
Author(s) -
A. I. Zanosko,
А. В. Дедов,
A. V. Belyaev
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1370/1/012005
Subject(s) - mechanics , heat flux , inlet , freon , materials science , critical heat flux , boiling , thermodynamics , mass flux , nucleate boiling , tube (container) , mass flow rate , volumetric flow rate , hydraulic diameter , flow (mathematics) , mass flow , cross section (physics) , heat transfer , composite material , mechanical engineering , physics , turbulence , reynolds number , engineering , quantum mechanics
This paper presents an experimental setup and experimental data for critical heat flux at high reduced pressures. Studies on critical heat flux during the forced flow of Freon R125 in a vertical channel with a diameter of 0.95 mm and length of 100 mm were performed. The hydraulic loop of the setup provides stable flow conditions at the inlet of the test section under pressures up to 2.5 MPa and temperatures up to 200 °C. The measured parameters were the mass flow rate, pressure and temperature at the inlet and outlet of the test section, the joule heating power and the wall temperature in the six cross-sections along the tube. An automated data-acquisition system was used during the experiments. A comparison between the experimental and calculated data is presented.