CFD Simulation of Upward Subcooled Boiling Flow of Freon R12

Abstract

Abstract. Subcooled flow boiling under forced convection occurs in many industrial applications to maximize heat removal from the heat source by the very high heat transfer coefficient. This work deals with CFD simulations of the subcooled flow boiling of refrigerant R12 solved by code ANSYS FLUENT r16. The main objective of this paper is verification of used numerical settings on relevant experiments performed at DEBORA test facility. Also comparisons with previously provided simulation on NRI Rez are presented. Data outputs from this work are basis to subsequent calculations of steam-water mixture cooling of Pb-Li eutectic.

Scientific Approaches to Solving the Problem of Joint Processes of Bubble Boiling of Refrigerant and Its Movement in a Heat Pump Heat Exchanger

“…To date, there are no universal methods for calculating the heat transfer coefficient or a universal description of the thermophysical picture of boiling in a liquid stream. However, many empirical methods have been created for various refrigerants under conditions of lowpressure values (up to 2-4 atm) and mass flow rates, and special formulas for calculating heat transfer to small channels (with a diameter of 1 mm and above) and to strictly specified pressure values have been derived [1][2][3][4][5].…”