| 摘要(英) |
Due to the gradually popularized of the communication satellite and cold chain transportation applications, low-temperature heat pipes are increasing it importance drastically in the past years. Most of those applications are in the temperature range of -20 to -40 oC. However, very few researches have been conducted within this temperature range. This study provided an experimental measurement of heat transfer performance of heat pipes operating at temperatures near -40 oC. Using three different sintered copper heat pipes with outside diameters of 8mm, 10mm, and 12 mm and using refrigerant R-32, R-134a, and R-245fa as working fluid were tested.
Based on the experimental results, the thermal resistance of refrigerant R-32 is best, followed by refrigerant R-134a, while refrigerant R-245fa performs the worst. The possible reason is that refrigerant R-32 has best property of saturated vapor pressure gradient, liquid thermal conductivity, and liquid transport parameter compared to refrigerant R-134a and refrigerant R-245fa.
The overall thermal resistance of the diameter of 12mm heat pipe is lower than that of the diameter of 10mm heat pipe in both refrigerant R-245fa and R-134a heat pipes. The reason is the larger diameter heat pipe, the heat transfer area of the liquid-vapor interface in the evaporating and condensing sections increases, leading to a decrease in the liquid-vapor interface thermal resistance and thus reducing the overall thermal resistance of the heat pipe. However, in the R-32 refrigerant heat pipe, the diameter of 12mm heat pipe has a thicker wick than the diameter of 10mm heat pipe. This results in an increase in the thermal resistance with the fluid-wick interface. The thickness of the wick has a more significant impact on the thermal resistance, causing the diameter of 10mm heat pipe has lower thermal resistance than the diameter of 12mm heat pipe in refrigerant R-32 heat pipes. |
| 參考文獻 |
[1] Source：https://www.bnext.com.tw/article/71771/leo-compatible--5g-components0920
[2] Source： https://h5.qingdan.com/post/257373
[3] A. Faghri, “Heat pipe science and technology.” Global Digital Press, 1995.
[4] G. Peterson and G. Compagna, “Cryogenic heat pipes in spacecraft applications.” 4th Thermophysics and Heat Transfer Conference, 1986.
[5] 王啟川, “熱交換設計 Heat Transfer Design.” 五南圖書出版股份有限公司, 2007.
[6] 林唯耕, “電子構裝散熱理論與量測實驗之設計.” 國立清華大學出版社, 2017.
[7] W.S. Chi, “Heat Pipe Theory And practice: A Source book.” McGraw-Hill, New York, 1976.
[8] A.R. Anand, “Effect of various parameters on heat transport capability of axially grooved heat pipes.” Thermal Science and Engineering Progress 24 100890, 2021.
[9] K.R. Schlitt and J.P. Kirkpatrick, “Parametric performance of extruded axial grooved heat pipes from 100 to 300 K.” Thermophysics and Heat Transfer Conference, 1974.
[10] J. Hauser, A. Hauser, and B.G.M. Aalders, “Design and qualification of methane-filled heat pipes for the SCIAMACHY radiant cooler.” Sixth European Symposium on Space Environmental Control Systems. Vol. 400, 1997.
[11] I. Sauciuc, M. Mochizuki, K. Mashiko, Y. Saito, and T. Nguyen, “The Design and Testing of the Super Fiber Heat Pipes for Electron-ics Cooling Applications.” Sixteenth IEEE SEMI-THERM Symposium, pp. 27-32, 2000.
[12] C.K. Loh, E. Harris, and D.J. Chou, “Comparative study of heat pipes performances in different orientations.” Semiconductor Thermal Measurement and Management IEEE Twenty First Annual IEEE Symposium, 2005.. IEEE, 2005.
[13] C. Li, and G.P. Peterson, “Parametric study of pool boiling on horizontal highly conductive microporous coated surfaces” ASME J. Heat Transfer, Vol. 129, pp. 1465-1475, 2007.
[14] J.T. Cieslinski, “Nucleate pool boiling in porous metallic coatings,” Experimental Thermal and Fluid Science Vol. 25 pp. 557-564, 2002.
[15] 蔡昇翰, “不同參數對燒結式熱管性能之影響研究.” 國立中央大學機械工程研究所碩士論文, 2015.
[16] A.R. Anand, “Analytical and experimental investigations on heat transport capability of axially grooved aluminium-methane heat pipe.” International Journal of Thermal Sciences 139 269-281, 2019.
[17] R. Wanison, N. Kimura, and M. Murakami, “A study of the thermal behavior of a nitrogen heat pipe for a wide range of heat loads at several filling ratios.” IOP Conference Series: Materials Science and Engineering. Vol. 502. No. 1. IOP Publishing, 2019.
[18] J. Jones, “Aluminum/ammonia heat pipe gas generation and long term system impact for the Space Telescope′s Wide Field Planetary Camera.” 18th Thermophysics Conference, 1983.
[19] A. Hamilton and J. Hu, “An electronic cryoprobe for cryosurgery using heat pipes and thermoelectric coolers: a preliminary report.” Journal of medical engineering & technology 17.3 104-109, 1993.
[20] A.R. Anand, A.J. Vedamurthy, S.R. Chikkala, S. Kumar, D. Kumar, and P.P. Gupta, “Analytical and experimental investigations on axially grooved aluminum-ethane heat pipe.” Heat transfer engineering 29.4 410-416, 2008.
[21] Z. Lataoui, C. Romestant, Y. Bertin, A. Jemni, and D. Petit, “Inverse thermal analysis of the drying zone of the evaporator of an axially grooved heat pipe.” Experimental thermal and fluid science 34.5 562-574, 2010. |
[Endnote RIS 格式]
[相關文章]
[文章引用]
[完整記錄]
[館藏目錄]
至系統瀏覽論文 ( 永不開放)
plurk
funp
live
udn
HD
myshare
netvibes
friend
youpush
delicious
baidu
Google bookmarks
del.icio.us
hemidemi
facebook
twitter
google
reddit