熱サイフォン形ヒートパイプの冷却部熱伝達特性に関する研究 : 伝熱劣化に対するエントレインメントの影響

概要

論文の詳細を見る
Condensation heat transfer in a closed two-phase thermosyphon is experimentally examined using two different types of test section. Test Section 1 is a straight pipe type thermosyphon and Test Section 2 has a large diameter evaporator compared with a condenser to minimize entrainment from the evaporator. Condensation heat transfer in Test Section 1 shows much lower heat transfer than the Nusselt theory. This low condensation heat transfer occurs due to working fluid entrainment. It is confirmed from a result of Test Section 2 that the condensation heat transfer is similar to the Nusselt theory as far as the effect of working fluid entrainment is negligible and the flooding does not occur. A new correlation for the heat transfer coefficient considering the effect of entrainment is proposed.
社団法人日本機械学会の論文
2000-12-25