撥水性多孔質を通過する凝縮流の素過程理解に基づくループヒートパイプ凝縮器の機能化

点击翻译按钮获取中文摘要

In this year’s 2-month extension period for last year’s work, based on previous visualization tests, the condensation phenomena of multi-evaporator loop heat pipe (MLHP) were investigated. Several mathematical models for predicting the condensation phenomena were used to confirm the MLHP's condensation behavior. The heat transfer coefficient, the lengths of the superheated vapor region, two-phase flow region and the subcooled liquid region were studied. This work will contribute to the optimal design for MLHP's condenser used in future spacecraft. After confirming the MLHP's condensation behavior, the applicant used this knowledge to improve the heat transfer technology in different fields. In space use, the applicant designed the cryogenic loop heat pipe (CLHP) for cooling machines working in cryogenic temperature range. A CLHP was developed with the working fluid nitrogen, the operating temperature range of 80-110 K and more than 10 W heat transfer capability for 2 m heat transport distance. Demonstration tests will be conducted in the future. In ground use, the applicant designed the two-phase mechanically pumped fluid loop system. A two-phase mechanically pumped fluid loop system that can cooling different heat sources was designed for cooling the future large capacity heat generation system, such as the electric airplane. The achievements in this research will be summarized as journal articles and conference papers.