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Open Access Nano Express

The magnetic-nanofluid heat pipe with superior thermal properties through magnetic enhancement

Yuan-Ching Chiang1, Jen-Jie Chieh2* and Chia-Che Ho3

Author affiliations

1 Department of Mechanical Engineering, Chinese Culture University, No. 55, Hwa-Kang Rd., Yang-Ming-Shan, Taipei, 111, Taiwan

2 Institute of Electro-Optical Science and Technology, National Taiwan Normal University, No.88, Sec.4, Ting-Chou Rd., Taipei, 116, Taiwan

3 Department of Mechanical Engineering, National Central University, No.300, Jhongda Rd., Jhongli City, Taoyuan County, 32001, Taiwan

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Citation and License

Nanoscale Research Letters 2012, 7:322  doi:10.1186/1556-276X-7-322

Published: 20 June 2012

Abstract

This study developed a magnetic-nanofluid (MNF) heat pipe (MNFHP) with magnetically enhanced thermal properties. Its main characteristic was additional porous iron nozzle in the evaporator and the condenser to form a unique flowing pattern of MNF slug and vapor, and to magnetically shield the magnet attraction on MNF flowing. The results showed that an optimal thermal conductivity exists in the applied field of 200 Oe. Furthermore, the minor thermal performance of MNF at the condenser limited the thermal conductivity of the entire MNFHP, which was 1.6 times greater than that filled with water for the input power of 60 W. The feasibilities of an MNFHP with the magnetically enhanced heat transfer and the ability of vertical operation were proved for both a promising heat-dissipation device and the energy architecture integrated with an additional energy system.

Keywords:
magnetic nanofluids; thermal conductivity; slug; vapor