Study of Influence Effect on Heat Transfer Performance of Single-Loop Oscillating Heat Pipe

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s. The experiment studied the effect of heat source temperature, heating section length ratio, cooling air flow rate, liquid filling rate and pipe diameter on the heat transfer performance of the single-loop red copper-water oscillating heat pipe. The results show that increasing heat source temperature or pipe diameter and reducing filling rate can obviously reduce the thermal resistance of the heat pipe; in the air cooling mode, the cooling thermal resistance outside the pipe is affected by both cooling conditions and heat pipe cooling section average temperature; when the heating section is shorter than the cooling section, the heat pipe thermal resistance shows an apparent trend of increasing with the increase of heating section length ratio, when the heating section is longer than the cooling section, the cooling thermal resistance increases with it apparently; the heat transfer power is the highest when the filling rate is 50%.

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114-118

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February 2014

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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[1] H. Akachi, Structure of a Micro Heat Pipe[P]. US 5219020, (1993).

Google Scholar

[2] H.H. Yang , S. Khandekar, M. Groll, Performance characteristics of pulsating heatpipes as integral thermal spreaders, Therm. Sci., 48 (4) (2009) 815-824.

DOI: 10.1016/j.ijthermalsci.2008.05.017

Google Scholar

[3] H.H. Yang, S. Khandekar, M. Groll, Experimental Investigation of the Flow Patterns in a Single Closed Loop Pulsating Heat Pipe, Fluid Mach., 35 (1) (2007) 60-63.

Google Scholar

[4] L.H. Fu, Experimental Research on Heat Transfer performance of Pulsating Heat Pipe, REFRIGERATION, 7(2)(2008)7-11.

Google Scholar

[5] J.T. Li , Z.X. Han, Z.H. Li , et al. An Analysis of Flow Patterns and Directions of a Pulsating Heat Pipe, J. Eng. Therm. Energy Power, 24(3)(2009)347-351.

Google Scholar

[6] H.H. Yang, C. Zhang, M. Groll, Comparion between Two K inds ofPulsating HeatPipes (C ircle Tube Type and FlatPlate Type w ith Square Channels), Fluid Mach., 37(6) (2009)70-72.

Google Scholar

[7] H.H. Yang, S. Khandekar, M. Groll, Operational limit of closed loop pulsating heat pipes, Appl. Therm. Eng., 28(2008)49–59.

DOI: 10.1016/j.applthermaleng.2007.01.033

Google Scholar

[8] S. Lips, A. Bensalem, Y. Bertin, A. Vincent, C. Romestant, J. Bonjour, Experimental evidences of distinct heat transfer regimes in pulsating heat pipes (PHP), Appl. Therm. Eng., (2010)951-957.

DOI: 10.1016/j.applthermaleng.2009.12.020

Google Scholar

[9] S. f. Wang, S.F. Nishio, Effect of Length Ratio of Heating Section to Cooling Section on Properties of Oscillating Heat Pipes, J. S. China Univ. Technol. (Nat. Sci. Edit. ), 35(11)(2007) 59-61.

Google Scholar

[10] W. Qu, T.Z. Ma, Steady state operational mechanism of looped pulsating heat pipe, J. Eng. Therm., 25(2)(2004)323-325.

Google Scholar

[11] D.Z. Yuan, W. Qu, T.Z. Ma, Flow and heat transfer of liquid plug and neighboring vapor slugs in a pulsating heat pipe, Int. J. Heat Mass Transf., 53(6) (2010)1260–1268.

DOI: 10.1016/j.ijheatmasstransfer.2009.12.042

Google Scholar

[12] S.F. Wang, S. Nishio, Study on heat transport characteristic of closed loop SEMOS heat pipe/ASME Summer Heat Transfer Conference, July17-22, San Francisco, USA, (2005).

Google Scholar

[13] S.F. Wang, S. Nishio,Heat transfer performance of a closed oscillating heat pipe/IHTC-13 August13-18, Sydeny, Australia, (2006).

DOI: 10.1615/ihtc13.p22.380

Google Scholar