Butanol Aqueous Solution as an Useful Liquid of Boiling -Various Aspects of Boiling
Butanol aqueous solution enhances critical heat flux from one to three times higher than that of pure water. Generating bubbles are very small even at the saturated condition because they are hard to coalescence. Although the critical heat flux of subcooled boiling shows a peculiar dependence on subcooling but it is also much better than that of pure water. These results indicate that butanol aqueous solution is a promising and useful working liquid for the application of boiling to the development of high efficient cooling devices with micro structured flow passages. In this article, the experimental results of pool boiling on a heated wire are described in detail. Also the test results of transient cooling of a heated flat surface and of flow boiling inside a mini-channel are reported. Besides the main topic of boiling heat transfer, a few related topics are also discussed. They include (1) bubble size and the existence of two types of boiling mode, (2) selective evaporation of the two liquid components (water and butanol). Butanol aqueous solution is a peculiar liquid sometimes called as a “self-rewetting liquid since its surface tension increases with liquid temperature in the region of high liquid temperature, indicating the existence of nonlinear Marangoni effects and nonlinear thermo-capillary force. Together with this nonlinear surface tension, selective evaporation may yield the peculiar characteristics of boiling heat transfer and bubble behaiviors.
nucleate boiling critical heat flux butanol aqueous solution quench test flow boiling inside mini-tube
Masahiro Shoji Shotaro Nishiguchi
Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama, 221-8686 Japan
国际会议
4th International Symposium on Heat Transfer and Energy Conservation(第四届传热与节能国际研讨会 ISHTEC2012)
广州
英文
1-8
2012-01-06（万方平台首次上网日期，不代表论文的发表时间）