期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 273, 期 -, 页码 183-191出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2014.03.055
关键词
Metal nanofluids; Deposition; Oxidation; Thermal conductivity; Heat transfer
资金
- Basic Science Program through National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology [NRF-2011-0021376]
- Malaysia UM/MOHE/HIR [D000010-16001]
A pre- and post experimental analysis of copper-water and silver-water nanofluids are conducted to investigate minimal changes in quality of nanofluids before and after an effective heat transfer. A single loop oscillating heat pipe (OHP) having inner diameter of 2.4 mm is charged with aforementioned nanofluids at 60% filling ratio for end to end heat transfer. Post experimental analysis of both nanofluids raises questions to the physical, chemical and thermal stability of such suspension for hazardless uses in the field of heat transfer. The color, deposition, dispersibility, propensity to be oxidized, disintegration, agglomeration and thermal conductivity of metal nanofluids are found to be strictly affected by heat transfer process and vice versa. Such degradation in quality of basic properties of metal nanofluids implies its challenges in practical application even for short-term heat transfer operations at oxidative environment as nano-sized metal particles are chemically more unstable than its bulk material. The use of the solid/liquid suspension containing metal nanoparticles in any heat exchanger as heat carrier might be detrimental to the whole system. (C) 2014 Elsevier B.V. All rights reserved.
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