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Modeling and Analyses of Boiling and Capillary Limitations for Micro Channel Wick Structures

  • S.-W. Chen (a1) (a2), F.-C. Liu (a1), T.-Y. Wang (a1), W.-K. Lin (a1) (a2), J.-R. Wang (a1), H.-T. Lin (a3), J.-D. Lee (a4), J.-J. Peir (a4) and C.-K. Shih (a1)...

Abstract

In order to analyze the boiling and capillary limitations of two-phase heat transport devices, the existing models developed by Chi and Peterson and the existing experimental data carried out with various micro channel wick structures from literature were collected for benchmark. It was found that the dominant parameters for boiling and capillary limitations were the nucleation sites and structure geometries of the micro channels, and important parameters were considered to modify the models empirically. It was also found that for micro channel structures the inclined angle is sensitive to the capillary limitations and not to boiling limitations. By properly estimating the nucleation sites and empirical coefficients for micro channels needed by the newly modified models, the boiling and capillary limitations can be accurately predicted, and hence the applicability of the modified models is confirmed. Based on this, a numerical analysis was then carried out to investigate the trends of boiling and capillary limitations of the micro channel wick structures. Effects of the channel geometries and arrangement were taken into account, including the aspect ratio and structure size of the micro channels. Furthermore, the effects of inclined angle and contact angle were also analyzed. The present results can provide a design reference of performance trends of micro channel wick structures.

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*Corresponding author (chensw@mx.nthu.edu.tw)

References

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1.Connors, M., “Cooling High-Power Electronic Components in Small Packages,” Thermacore, Inc., http://www.thermacore.com/news/high-power-electronic-components.aspx (2009).
2.Columbia-Staver Ltd., “Heat Pipes,” Columbia-Staver Ltd., http://www.columbia-staver.co.uk/technologies/heat-pipes/ (2015).
3.Chi, S. W., Heat Pipe Theory and Practice – A Sourcebook, Hemisphere Publishing Corp., Washington, D. C., pp. 3386 (1976).
4.Peterson, G. P., Heat Pipes – Modeling, Testing, and Applications, John Wiley & Sons, Inc, New York, N.Y., pp. 4499 (1994).
5.Peterson, G. P. and Ha, J. M., “Capillary Performance of Evaporating Flow in Micro Grooves: An Approximate Analytical Approach and Experimental Investigation,” Journal of Heat Transfer, 120, pp. 743751 (1998).
6.Ha, J. M. and Peterson, G. P., “Capillary Performance of Evaporating Flow in Micro Grooves: An Analytical Approach for Very Small Tilt Angles,” Journal of Heat Transfer, 120, pp. 452457 (1998)
7.Ha, J. M. and Peterson, G. P., “The Heat Transport Capacity of Micro Heat Pipes,” Journal of Heat Transfer, 120, pp. 10641071 (1998)
8.Cao, Y., Gao, M., Beam, J. E. and Donovan, B., “Experiments and Analyses of Flat Miniature Heat Pipes,” Energy Conversion Engineering Conference (IECEC 96), Washington, DC, USA (1996).
9.Hsieh, J. C., Chen, S. W., Yeh, S. C., Shen, S. C. and Chen, C. R., “Experimental Study on Thermal Performance of Aluminum Flat Plate Heat Pipe,” 23rd Chinese Society of Mechanical Engineering Conference, Tainan, Taiwan (2006).
10.Chen, S. W., et al., “Visualization Study on Boiling and Capillary Limits of Silicon-Based Micro Structures,” 10th China Heat Pipe Conference, Gui-Yang, Gui Zhou, P. R. C., pp. 113 (2006).
11.Chen, S. W., et al., “Experimental Investigation and Visualization on Capillary and Boiling Limits of Micro Groove by Different Processes,” Sensors and Actuators A: Physical, 139, pp. 7887 (2007).
12.Sobhan, C. B., Rag, R. L. and Peterson, G. P., “A Review and Comparative Study of the Investigations on Micro Heat Pipes,” International Journal of Energy Research, 31, pp. 664688 (2007).
13. “Sessile Drop Technique,” Wikipedia, https://en.wikipedia.org/wiki/Sessile_drop_technique (2015).
14.Chi, S. W., “Mathematical Modeling of High and Low Temperature Heat Pipes,” GW University Report to NASA, Grant No. NGR 09-010-070 (1971).
15.Kays, W. M., Convective Heat and Mass Transfer, McGraw-Hill, New York (1966).
16.Griffith, P. and Wallis, G. D., “The Role of Surface Conditions in Nucleate Boiling,” Chemical Engineering Progress Symposium Series, 56, pp. 4963 (1960).
17.Yang, S. R. and Kim, R. H., “A Mathematical Model of the Pool Boiling Nucleation Site Density in Terms of the Surface Characteristics,” International Journal of Heat and Mass Transfer, 31, pp. 11271135 (1988).
18.Hibiki, T. and Ishii, M., “Active Nucleation Site Density in Boiling Systems,” International Journal of Heat and Mass Transfer, 46, pp. 25872601 (2003).
19.Wang, C. H. and Dhir, V. K., “Effect of Surface Wettability on Active Nucleation Site Density During Pool Boiling of Water on a Vertical Surface,” Journal of Heat Transfer, 115, pp. 659669 (1993).
20.Wang, C. H. and Dhir, V. K., “On the Gas Entrapment and Nucleation Site Density During Pool Boiling of Saturated Water,” Journal of Heat Transfer, 115, pp. 670679 (1993).
21.Zou, L. and Jones, B. G., “Heating Surface Material's Effect on Subcooled Flow Boiling Heat Transfer of R134a,” International Journal of Heat and Mass Transfer, 58, pp. 168174 (2013).
22.Benjamin, R. J. and Balakrishnan, A. R., “Nucleation Site Density in Pool Boiling of Saturated Pure Liquids: Effect of Surface Micro Roughness and Surface and Liquid Physical Properties,” Experimental Thermal and Fluid Science, 15, pp. 3242 (1997).
23.Benjamin, R. J. and Balakrishnan, A. R., “Nucleation Site Density in Pool Boiling of Binary Mixtures: Effect of Surface Micro Roughness and Surface and Liquid Physical Properties,” The Canadian Journal of Chemical Engineering, 75, pp. 10801089 (1997).
24.Li, Y. Y., Chen, Y. J. and Liu, Z. H., “A Uniform Correlation for Predicting Pool Boiling Heat Transfer on Plane Surface with Surface Characteristics Effect,” International Journal of Heat and Mass Transfer, 77, pp. 809817 (2014).
25. “Engineer's Handbook, Reference Tables — Surface Roughness Table,” http://EngineersHandbook.com, http://www.engineershandbook.com/Tables/surfaceroughness.htm (2004).
26.Feng, K., Kapadia, N., Jobson, B. and Castaldi, S., “Cupric Chloride-HCl Acid Microetch Roughening Process,” OnBoard Technology September 2008, pp. 1215 (2008).

Keywords

Modeling and Analyses of Boiling and Capillary Limitations for Micro Channel Wick Structures

  • S.-W. Chen (a1) (a2), F.-C. Liu (a1), T.-Y. Wang (a1), W.-K. Lin (a1) (a2), J.-R. Wang (a1), H.-T. Lin (a3), J.-D. Lee (a4), J.-J. Peir (a4) and C.-K. Shih (a1)...

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