Characteristics of Long Size Thermosyphons Made of Corrugated Tube

概要

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Two-phase closed thermosyphons made of corrugated tube operating in the gravitational field have different characteristics in comparison with that of smooth tube in some items. The cause depends on the accumulated working fluid in the concave space of corrugated tube which tends to induce a dry-out phenomenon in the evaporator section. The difference of these characteristics between thermosyphons of corrugated tube and smooth tube seems to amplify with the increment of the length of the thermosyphon. The temperature distribution along the axis of thermosyphon, the heat transport and the heat transfer coefficient as a function of the inclination angle at a fill charge ratio 50% of the working fluid have been obtained by the experiments and discussed in the present paper. A correlating equation of the heat transfer coefficient has been deduced also from the experiments.
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