An Experimental Investigation on the Heat Transfer Coefficient of Oscillating Heat Pipes

Abstract:

This paper presents an experimental study on total heat transfer coefficient (h_t) in oscillating heat pipe heat exchanger hot air flow tunnels, h_t plays an important role in the oscillating heat pipes design process. In this paper, h_t and the convective heat transfer coefficient (h) was investigated by experimentally and theoretical calculation respectively. From experimental study, the relationship between the ratio of heat transfer coefficient and the relative humidity is obtained. The results show that the ratio of ht to h increases from 5 to 20 as the relative humidity of the hot gas increasing from 19.22% to 60%. According to the experimental data, a matched curve and an empirical equation were presented, which can be described as h_t=h(1.87783+0.09631x+0.0032x²).

• Periodical: Advanced Materials Research (Volumes 732-733)
• Pages: 78-82
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.732-733.78
• Online since: August 2013
• Authors: Ling Gao*, Wen Guang Geng, Xiao Xu Ma, Xiu Li Ma, Guang Liang Luo, Xuan You Li
• Keywords: Energy Recovery, Heat Transfer Coefficient, Oscillating Heat Pipe

References

[1] Akachi, H., "Structure of micro-heat pipe", US. Pat., 5219020(1993)

[2] Akachi, H., "Tunnel-plate heat pipe", U.S. Pat., 5697428(1997)

[3] H. Akachi, Looped Capillary Heat Pipe, Proc. 71st JSME Spring Annual Meeting, 1994, Vol.3, No.940-10, pp.606-611

[4] Wu cunzhen. Application of heat pipe in thermal engineering. water power press, Beijing, (1993)

[5] Akira TSUCHIYA, Ryouichi IGUSA, Motoharu SAKAI: Proceedings of JSES/JWEA Joint Conference(in Japanese), 425-428(2008)

[6] Ryouichi IGUSA, Takeshi YAMAZAKI, Naoyuki YADA: Proceedings of JSES/JWEA Joint Conference (in Japanese), 409-412 (2009)

[7] Holman J P. Heat transfer.8th ed. New York: McGraw-Hill Companies,1997.289,305.364.