American Journal of Mechanical Engineering
ISSN (Print): 2328-4102 ISSN (Online): 2328-4110 Website: Editor-in-chief: Kambiz Ebrahimi, Dr. SRINIVASA VENKATESHAPPA CHIKKOL
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American Journal of Mechanical Engineering. 2020, 8(1), 9-16
DOI: 10.12691/ajme-8-1-2
Open AccessReview Article

Empirical Correlation for an Ammonia Charged Aluminum Closed Loop Pulsating Heat Pipe

Md Shahidul Haque1, Antara Majumdar1, Md. Faisal Kader1, and Md. Mahbubur Razzaq2

1Department of Mechanical Engineering, Bangladesh Military Academy, Bhatiay, Chittagong, Bangladesh

2Department of Mechanical Engineering, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh

Pub. Date: May 05, 2020

Cite this paper:
Md Shahidul Haque, Antara Majumdar, Md. Faisal Kader and Md. Mahbubur Razzaq. Empirical Correlation for an Ammonia Charged Aluminum Closed Loop Pulsating Heat Pipe. American Journal of Mechanical Engineering. 2020; 8(1):9-16. doi: 10.12691/ajme-8-1-2


Pulsating Heat Pipe (PHP) has become one of the promising options for passive heat transfer. This technique is especially efficient for cooling of micro and nano sized particles. This paper works on a aluminum made and ammonia charged pulsating heat pipe. The heat pipe consists of aluminum tubing having total 14 turns of 3mm and 4mm as inner and outer diameter. A constant electric power supply of 36 W was provided to run the pulsation mechanism. The experiment was carried out for three filling ratios of 0.4, 0.6 and 0.8 as well as inclination angle of 30°, 45°, 60°, 90° and 180°. The objective of this research is to formulate an empirical correlation between overall heat transfer coefficient and different physical parameter such as heat input, evaporator temperature rise, fill ratios and inclinations. It has been found that the correlation is effective for heat input and filling ratios. Experimental results showed that for these two parameters the correlation converges well.

pulsating heat pipe heat input fill ratio empirical correlation

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[1]  N. Tesla, "Valvular Conduit". New York Patent US 1329559 A, 3 February 1920.
[2]  R. S. Gaugler, "HEAT TRANSFER DEVICE". Dayton, Ohio Patent 2,350,348, 6 June 1944.
[3]  H. Akachi, "STRUCTURE OF MICRO-HEAT PIPE". Sagamihara, Japan Patent 5,219,020, 15 August 1991.
[4]  G. M. Grover, "Evaporation-Condenssation Heat Transfer Device". US Patent 3229759, 2 December 1963.
[5]  P. a. R. Dunn, Heat Pipes, Pergamon Press, 1982.
[6]  A. Faghri, "Review and Advances in Heat Pipe Science and Technology," Journal of heat Transfer, vol. 134, no. 12, p. 18 pages, 2012.
[7]  X. J. L. a. Z. Z. Q. Zhang X. M., "Experimental Study of a Pulsating Heat pipe using FC-72, Ethanol and Water as working fluid," vol. 12, pp. 445-472, 1999.
[8]  B. a. F. Holley, "Analysis of Pulsating Heat Pipe with Capillary Wick and Varying Channel Diameter," International Journal of Heat and Mass Transfer , vol. 48, pp. 2635-2651, 2005.
[9]  T. Dobson R.T. and Harms, "Lumped Parameter Analysis of Closed and Open Oscillatory Heat Pipes," in 11th International Heat Pipe Conference , Tokyo, Japan , 1999.
[10]  S. K. M. G. Honghai Yang, "Performance characteristics of pulsating heat pipes as integral thermal spreaders," International Journal of Thermal Sciences, vol. 48, pp. 815-824, 2009.
[11]  Khandekar S. and Groll M., "An Insight into Thermo-Hydraulic Coupling in Pulsating Heat Pipes," Int. J. of Thermal Sciences, vol. 43, no. 1, pp. 13-20, 2004.
[12]  B. Y. W. T. N. a. O. K. T. Tong, " Closed-loop pulsating heat pipe," Applied Thermal Engineering, vol. 21, p. 1845-1862, 2001.
[13]  A. F. Y. Z. M.B.Shafi, " Thermal modeling of unlopped and looped pulsating heat pipes," ASME J. Heat Transfer , vol. 123, pp. 1159-1172, 2001.
[14]  P. T. T. W. P. K. M. M. P Sakulchangsatjatai, "Operation modeling of closed end and closed loop oscillating heat pipe at normal operat-ing condition," Appl. Therm. Eng., vol. 24, pp. 995-1008, 2004.
[15]  A. M. M. F. K. a. M. M. R. Md Shahidul Haque, "Thermal characteristics of an ammonia-charged closed-loop pulsating heat pipe," Journal of Mechanical Science and Technology, vol. 33, no. 4, pp. 1907-1914, 2019.