An Investigation of the Thermal Performance of a Novel Axial Grooved Heat Pipe

Abstract:

Heat pipes are devices capable of very high heat transfer and have been widely used in many thermal management applications. An experimental investigation of thermal characteristics of heat pipe with axial ‘‘Ω”-shaped grooves was presented in this paper. The effects of angle of inclination and input power on thermal performance of heat pipe were investigated, the surface tension and gravity both impacted the fluid flow in heat pipe, and which one was dominating was analyzed. Experimental results indicate that the working temperature of heat pipe, the axial temperature differences and the maximum axial temperature differences increase when increasing the input heat flux. The total thermal resistances become smaller with the input power increasing, but become bigger with the angle of inclination increasing. And the trend of the thermal coefficient of heat pipe reverses that of the total thermal resistance. The influence of gravity on thermal performance is weaker than that of the surface tension.

• Periodical: Advanced Materials Research (Volume 580)
• Pages: 223-226
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.580.223
• Online since: October 2012
• Authors: K.M. Yang, N.H. Wang, C.H. Jiang, L. Cheng
• Keywords: Experimental Research, Grooved Heat Pipe, Surface Tension, Thermal Resistance

References

[1] Balram Suman, Sirshendu De, Sunando DasGupta, Transient modeling of micro-grooved heat pipe, International Journal of Heat and Mass Transfer 48 (2005) 1633-1646.

DOI: 10.1016/j.ijheatmasstransfer.2004.11.004

[2] T.P. Cotter, Principles and prospects of micro-heat pipes, in: Proceedings of the 5th International Heat Pipe Conference, Tsukuba, Japan (1984) 328–332.

[3] S. Gokhale, J.L. Plawsky, P.C. Wayner Jr., S. DasGupta, Experimental measurement of pressure gradient and fluid flow in a small spreading drop during condensation, Phys. Fluids 16 (6) (2004) 1942–(1955).

DOI: 10.1063/1.1718991

[4] P.C. Wayner Jr., The effect of interfacial mass transport on flow in thin liquid films, Colloids Surf. 52 (1991) 71–84.

DOI: 10.1016/0166-6622(91)80006-a

[5] L. Zheng, J.L. Plawsky, P.C. Wayner Jr., S. Das Gupta, Stabilityand oscillations in an evaporating corner meniscus, J. Heat Transfer 126 (2004) 169–178.

DOI: 10.1115/1.1652046

[6] M. Dubois, B. Mullender, W. Supper, Space qualification of high capacity grooved heat pipes, Society of Automotive Engineers, SAE Paper, 972453, Warrendale, PA, (1997).

DOI: 10.4271/972453

[7] B. Suman, A steady state model and maximum heat transport capacity of an electrohydrodynamically augmented micro-grooved heat pipe, Int. J. Heat Mass Transfer 49 (2006) 3957–3967.

DOI: 10.1016/j.ijheatmasstransfer.2006.04.011

[8] H.B. Ma, G.P. Peterson, X.J. Lu, The influence of vapor–liquid interaction on the liquid pressure drop in triangle microgrooves, Int. J. Heat Mass Transfer 37 (1994) 2211–2219.

DOI: 10.1016/0017-9310(94)90364-6

[9] S.W. Chen, J.C. Hsieh, C.T. Chou, H.H. Lin, S.C. Shen, M.J. Tsai, Experimental investigation and visualization on capillary and boiling limits of micro-grooves made by different processes, Sensors Actuators A Phys. 139 (2007) 78–87.

DOI: 10.1016/j.sna.2007.03.009

[10] D. Khrustalev, A. Faghri, Coupled liquid and vapor flow in miniature passages with microgrooves, J. Heat Transfer 121 (1999) 729–733.

DOI: 10.1115/1.2826042

[11] S.K. Thomas, R.C. Lykin, K.L. Yerkes, Full developed laminar flow in trapezoidal grooves with shear stress at the liquid–vapor interface, Int. J. Heat Mass Transfer 44 (2001) 3397–3412.

DOI: 10.1016/s0017-9310(01)00007-2

[12] S.J. Kim, J.K. Seo, K.H. Do, Analytical and experimental investigation on the operational characteristics and the thermal optimization of a miniature heat pipe with a grooved wick structure, Int. J. Heat Mass Transfer 46 (2003) 2051–(2063).

DOI: 10.1016/s0017-9310(02)00504-5

[13] J.S. Suh, S.P. Young, Analysis of thermal performance in a micro flat heat pipe with axially trapezoidal groove, Tamkang, J. Sci. Eng. 6 (4) (2003) 201–206.