The paper presents the enhancement in the operational limits (boiling, entrainment, sonic, viscous and capillary limits) of heat pipes using silver nanoparticles dispersed in de-ionized (DI) water. The tested nanoparticles concentration ranged from 0.003 vol. % to 0.009 vol. % with particle diameter of <100 nm. The nanofluid as working fluid enhances the effective thermal conductivity of heat pipe by 40%, 58%, and 70%, respectively, for volume concentrations of 0.003%, 0.006%, and 0.009%. For an input heat load of 60 W, the adiabatic vapor temperatures of nanofluid based heat pipes are reduced by 9 °C, 18 °C, and 20 °C, when compared with DI water. This reduction in the operating temperature enhances the thermophysical properties of working fluid and gives a change in the various operational limits of heat pipes. The use of silver nanoparticles with 0.009 vol. % concentration increases the capillary limit value of heat pipe by 54% when compared with DI water. This in turn improves the performance and operating range of the heat pipe.
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November 2013
This article was originally published in
Journal of Heat Transfer
Research-Article
Operational Limitations of Heat Pipes With Silver-Water Nanofluids
Lazarus Godson Asirvatham,
Lazarus Godson Asirvatham
1
e-mail: godson@karunya.edu; godasir@yahoo.co.in
1Corresponding author.
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Rajesh Nimmagadda,
Rajesh Nimmagadda
e-mail: rajesh.mech335@gmail.com
Department of Mechanical Engineering,
Department of Mechanical Engineering,
Karunya University
,Coimbatore 641 114, Tamil Nadu
, India
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Somchai Wongwises
Somchai Wongwises
Fluid Mechanics,
Thermal Engineering and Multiphase Flow Research Lab (FUTURE),
Department of Mechanical Engineering,
Faculty of Engineering,
Thermal Engineering and Multiphase Flow Research Lab (FUTURE),
Department of Mechanical Engineering,
Faculty of Engineering,
King Mongkut's University of Technology
,Thonburi, 126 Bangmod, Tongkru, Bangkok 10140
, Thailand
;The Academy of Science,
The Royal Institute of Thailand,
Sanam Suea Pa, Dusit,
Bangkok 10300, Thailand
e-mail: somchai.won@kmutt.ac.th
The Royal Institute of Thailand,
Sanam Suea Pa, Dusit,
Bangkok 10300, Thailand
e-mail: somchai.won@kmutt.ac.th
Search for other works by this author on:
Lazarus Godson Asirvatham
e-mail: godson@karunya.edu; godasir@yahoo.co.in
Rajesh Nimmagadda
e-mail: rajesh.mech335@gmail.com
Department of Mechanical Engineering,
Department of Mechanical Engineering,
Karunya University
,Coimbatore 641 114, Tamil Nadu
, India
Somchai Wongwises
Fluid Mechanics,
Thermal Engineering and Multiphase Flow Research Lab (FUTURE),
Department of Mechanical Engineering,
Faculty of Engineering,
Thermal Engineering and Multiphase Flow Research Lab (FUTURE),
Department of Mechanical Engineering,
Faculty of Engineering,
King Mongkut's University of Technology
,Thonburi, 126 Bangmod, Tongkru, Bangkok 10140
, Thailand
;The Academy of Science,
The Royal Institute of Thailand,
Sanam Suea Pa, Dusit,
Bangkok 10300, Thailand
e-mail: somchai.won@kmutt.ac.th
The Royal Institute of Thailand,
Sanam Suea Pa, Dusit,
Bangkok 10300, Thailand
e-mail: somchai.won@kmutt.ac.th
1Corresponding author.
Contributed by the Heat Transfer Division of ASME for publication in the Journal of Heat Transfer. Manuscript received May 28, 2012; final manuscript received March 9, 2013; published online September 23, 2013. Assoc. Editor: Sujoy Kumar Saha.
J. Heat Transfer. Nov 2013, 135(11): 111011 (10 pages)
Published Online: September 23, 2013
Article history
Received:
May 28, 2012
Revision Received:
March 9, 2013
Citation
Godson Asirvatham, L., Nimmagadda, R., and Wongwises, S. (September 23, 2013). "Operational Limitations of Heat Pipes With Silver-Water Nanofluids." ASME. J. Heat Transfer. November 2013; 135(11): 111011. https://doi.org/10.1115/1.4024616
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