分離形熱サイフォンの実験的研究(作動流体の突沸によるキャリーオーバーの発生について) Experimental Study of Separate Type Thermosyphon(On the Generation of Carry-Over of Working Fluid by Bumping)
The passages of vapor flow and the returning liquid flow are perfectly partitioned in a separate type thermosyphon. Therefore the flooding limit can be eliminated and practicability based on its construction is highly evaluated. The carry-over of the liquid into the condensing section accompanied with the rising vapor flow should be avoided in the separate type thermosyphon, since it causes to decrease the heat transfer coefficient on the heat transfer surface in the condenser.<br>In the present work, the effect of liquid level, the heat input into the evaporating section, the charging rate of the liquid, and the dimension of the adiabatic section supposed on the generation of carry-over were studied experimentally.<br>The frequency of the bumping and the velocity of the vapor in the adiabatic section were examined as the function of the termination of the carry-over. The experimental correlation representing the relation among the elapsed time, the liquid temperature and the charging rate of the liquid were also derived.
日本冷凍協会論文集 12(1), 85-94, 1995-03-31
Japan Society of Refrigerating and Air Conditioning Engineers