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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

CFD SIMULATION OF CONDENSATION INSIDE SMOOTH INCLINED TUBE AT DIFFERENT SATURATION TEMEPRATURES

Get access (open in a dialog) DOI: 10.1615/IHTC16.mpf.021949
pages 6191-6198

Аннотация

In this study, numerical simulations of the condensation of R134a inside an inclined smooth tube are performed. The effects of different parameters such as saturation temperature, tube inclination angle, vapour quality and mass flux on the variations of the condensation heat transfer coefficient and pressure drop along the tube were investigated. The simulations were performed at a uniform heat flux of 5050 W/m2, mass fluxes of 100 − 400 kg/m2.s, saturation temperatures of 30 − 50 °C, vapour qualities of 0.1 − 0.9 and inclination angles of -90° − +90° compared to horizontal line. The volume of fluid (VOF) model was used to solve the governing equations comprising continuity, momentum, energy and turbulence equations. The results also showed that the condensation heat transfer coefficient and pressure drop along the tube increased with the decrease in the saturation temperature and increase in mass flux and vapour qualities. It was also found that there was an optimum inclination angle range, -30° − -15°, in which the heat transfer coefficient attained its maximum value.