Abstract
Subcooled flow boiling under forced convection occurs in many industrial applications of purpose to maximize heat removal from the heat source by the very large 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 on 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.
Highlights
Subcooled flow boiling can solve a wide range of high power thermal challenges in the following areas: Central Processing Unit (CPU) and computational application Specific Integrated Circuits (ASICs) [1, 2], ultra-high brightness Light Emitting Diodes (LEDs) and lasers sources [3], automotive power electronics [4], or avionics [5], where research findings have made possible the development of a new generation of cooling hardware, which promises order of magnitude increase in heat dissipation compared to today’s cutting edge cooling schemes
Subcooled flow boiling is expected to realize the high heat flux cooling for electronic devices [6, 7], or for high heat flux cooling in microgravity [8]
The DEBORA experiments were chosen for comparison with data received from these simulations
Summary
Subcooled flow boiling can solve a wide range of high power thermal challenges in the following areas: Central Processing Unit (CPU) and computational application Specific Integrated Circuits (ASICs) [1, 2], ultra-high brightness Light Emitting Diodes (LEDs) and lasers sources [3], automotive power electronics [4], or avionics [5], where research findings have made possible the development of a new generation of cooling hardware, which promises order of magnitude increase in heat dissipation compared to today’s cutting edge cooling schemes. One of the perspective application of subcooled flow boiling is so-called cold trap facility This device serves for corrosion impurity separation from the metal eutectic (Pb, Pb-Li), whereas the separation is carried out by the cooling of the eutectic down to the required temperature. Provided experiment outputs contain especially void fraction, gas velocity, temperature of the fluid and the bubble size Because both freon R12 and water have relative physical similarity, we can use this freon for his lower operating parameters in comparison with water. The main output of this work is to determine selected parameters (pressure, velocity, temperatures) in the specified geometry position and compare them against the measured experimental data provided from DEBORA test facility and against the previously calculated values from NRI Rez simulations
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