Study of Self-Rewetting Fluid Applied to PTFE Wick of Loop Heat Pipe
| Autor: | Wei-Jhih Lin, 林煒智 |
|---|---|
| Rok vydání: | 2015 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 103 This study applied butanol aqueous solution to form self-rewetting fluid to LHP with a PTFE wick. Porous PTFE structure advantages including low sintering temperature and resistant to oxidation; however, due to PTFE’s hydrophobic nature, with water as working fluid, for example, it has been observed that PTFE cannot effectively pump the working fluid by capillary action. In this paper, self-rewetting fluid (butanol aqueous solution) was used to address the hydrophobic nature of PTFE, allowing the working fluid to successfully flow through the PTFE wick by capillary forces. 0 ~ 7wt% butanol aqueous solutions and 1~2.75mm wick thickness were tested for effectiveness and ease in allowing the working fluid to flow through the wick and LHP heat transfer performance test. Experimental results showed that, with 6wt% butanol aqueous solution and 2mm wick thickness, heat transfer performance is 550W, the minimal total thermal resistance is approximately 0.273℃/W, and the heat flux is 28W/cm2. Dimensionless performance figure of loop heat pipe, and can be used as reference for future wick designs. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
| Externí odkaz: |
|