Mathematical Simulation of Temperature Fields in Characteristic Sections of the Working Zone of the Closed Two-Phase Thermosyphon

About the authors:

Geniy V. Kuznetsov, Dr. Sci. (Phys.-Math.), Professor, Chief Researcher, Butakov Research Center, Tomsk Polytechnic University; kuznetsovgv@tpu.ru

Atlant E. Nurpeiis, Сand. Sci. (Tech.), Assistant, Butakov Research Center, Tomsk Polytechnic University; nurpeiis_atlant@mail.ru

Abstract:

The authors present the results of numerical studies of the joint thermal conductivity and coolant phase transformations in a cylindrical thermosyphon. The heat transfer problem for two bilayer plates is solved. The evaporation of liquid on the bottom cover and the condensation on the top cover of the thermosyphon is taken into account. The authors have conducted a numerical study of heat transfer in the closed two-phase thermosyphon with energy removal from a heat-emitting surface in fairly typical ranges of variation of heat flows to the bottom cover, corresponding to the operating modes of power equipment (2-8 kW/m2). Distilled water was considered as coolant. The filling ratios and geometric parameters of the thermosyphon are chosen the same as in the experiments conducted (height 161 mm, diameter 42 mm, wall thickness 1.5 mm, filling ratio ε = 4%).

The main results of mathematical simulation are presented in the form of temperature fields for various heat flows to the bottom cover of the thermosyphon and the heat transfer coefficient from the surface of the top cover of the heat exchanger under consideration. The results of mathematical simulation, obtained numerically, describe adequately the heat transfer in the thermosyphon and belong to the confident limits of the experimental data on the temperatures at the characteristic points of the heat exchanger.

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