密閉二相熱サイフォンの加熱限界

概要

論文の詳細を見る
In a closed two-phase thermosyphon, countercurrent flow which emerges in it results in a heating limit due to the occurrence of the flooding. Thus a double tube thermosyphon is designed which is a conventional single tube termosyphon with an inner tube inserted in order to control the occurrence of the flooding. In previous works it was shown that， with Freon R113 as a working fluid, the heating limit for the double tube thermosyphon was largely increased than the conventional one. But in the case of water as the working fluid, the increase in heating limit was not confirmed. In this work, experiments are performed with water and R113 as the working fluid, and flow patterns inside the thermosyphon are visually observed in detail. Then the relation between the flow patterns and the heating limit is revealed. The results are compared with those of privious works and some proposals for designing the optimum double tube thermosyphon are made.
1994-03-01