有芯和无芯高温重力钾热管启动性能试验研究
Test Study for Starting Performance of High-temperature Gravity Potassium Heat Pipes with and without Wick
-
摘要: 为研究有芯和无芯高温钾热管在重力状态下的启动性能，开展了相关对比与敏感性试验研究。得到有芯热管试验中的最优充液量为17.5 g，此充液量能避免充液量不足导致的启动升温较慢、末端温度低，也可避免充液量过大时间歇沸腾和过渡沸腾；无芯热管在启动和升温过程处于间歇沸腾工况，剧烈程度随充液量减少而降低，试验中最优充液量为9 g。在工程范围内，倾角对热管传热性能的影响可忽略。在试验状态下有芯钾热管启动性能优于无芯钾热管。Abstract: To investigate the starting performance of high-temperature potassium heat pipes with and without wick under gravity conditions, relevant correlations and susceptibility tests were conducted. The optimal filling volume of the heat pipe with wick is 17.5 g in the test. This filling volume can avoid the slow start-up temperature and the low end temperature caused by insufficient filling, and can also avoid intermittent boiling and transition boiling caused by excessive filling. Heat pipes without wick would be in intermittent boiling condition during starting and heating processes. The severity decreases with the filling volume. Its optimal filling volume is 9 g in the test. In the project scale, the influence of inclination on heat transfer performance of heat pipe can be ignored. In the test state, the starting performance of the potassium heat pipe with wick is better than that without wick.
-
Keywords:
- potassium heat pipe ,
- gravity heat pipe ,
- heat pipe starting ,
- filling volume ,
- intermittent boiling ,
- wick
-
-
[1] 焦波,邱利民,张洋. 低温重力热管传热性能的理论与实验研究[J]. 浙江大学学报：工学版,2008,42(11):1966-1971.JIAO Bo, QIU Limin, ZHANG Yang. Theoretical and experimental research on the heat transfer performance of cryogenic gravity tubes[J]. Journal of Zhejiang University: Engineering Science, 2008, 42(11): 1966-1971(in Chinese). [2] 山西哲夫,清水定明. 热管的应用[M]. 东京:东京大学出版社,1980:207. [3] 根岸完二. 宇宙航行的力学与传热学试验[R]. 东京:东京大学宇宙航行研究所,1980. [4] 康延滨,王仁人. 太阳能重力热管工作液体充装量研究[J]. 节能,2011,30(9):14-16.KANG Yanbin, WANG Renren. Research on liquid filling capacity of solar thermal heat pipe[J]. Energy Conservation, 2011, 30(9): 14-16(in Chinese). [5] STRELTSOV A I. Theoretical and experimental investigation of optimum filling for heat pipes[J]. Heat Transfer-Soviet Research, 1975, 7(1): 22-27. [6] FELDMAN K T, Jr, SRINIVASAN R. Investigation of heat transfer limits in two-phase closed thermosyphon[C]∥Proceedings of 5th International Heat Pipe Conference. Tsukuba, Japan: [s. n.], 1984. [7] 杨世铭,陶文铨. 传热学[M]. 北京:高等教育出版社,1998:183-186. [8] 郝老迷. 沸腾传热和气液两相流动[M]. 北京:中国核工业研究生部,2007:111-114. [9] FAGHRI A. Heat pipe science and technology[M].Washington D. C.: Taylor & Francis Press, 1995: 377-379. [10] NEGISH K. Thermo-fluid dynamics of two-phase closed thermosyphons[C]∥Proceedings of 5th International Heat Pipe Conference. Tsukuba, Japan: [s. n.], 1984.
计量
- 文章访问数: 205
- HTML全文浏览量: 0
- PDF下载量: 1209
下载:
