Theoretical and experimental research on heat transfer performance of the semi-open heat pipe

• Published in: Journal of Zhejiang University. A. Science Vol. 9; no. 3; pp. 410 - 415
• Main Authors: Zhu, Hua, Zhuang, Bo, Tan, Jin-jun, Hong, Rong-hua
• Format: Journal Article
• Language: English
• Published: Hangzhou Zhejiang University Press 01-03-2008; Institute of Thermal Science and Power Systems, Zhefiang University, Hangzhou 310027, China
• Subjects: Civil Engineering; Classical and Continuum Physics; Engineering; Industrial Chemistry/Chemical Engineering; Mechanical Engineering; 传递模式; 分析方法; 热力学; Heat transfer performance; Semi-open heat pipe; Closed heat pipe; TK1; First transitional point
• ISSN: 1673-565X; 1862-1775
• DOI: 10.1631/jzus.A071342

This paper focuses on the heat transfer performance of semi-open heat pipe which is a new type of heat pipe. After analyzing its condensation heat transfer mechanisms theoretically, several semi-open heat pipes in different length ratios and upper hole diameters are studied experimentally and compared with the same dimensions closed heat pipes. Experimental results show that the heat transfer performance of semi-open heat pipe becomes better by increasing heat transfer rate. At the first transitional point, the heat transfer performance of semi-open heat pipe approaches the level of the closed heat pipe. It is suitable to choose upper small hole about 1 mm in diameter and length ratio larger than 0.6 for the semi-open heat pipe.