title: Is metal nanofluid reliable as heat carrier?
abstract: 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 2.4mm 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.
authors.affiliation: Department of Energy and Mechanical Engineering, The Institute of Marine Industry, Cheondaegukchi-Gil 38, Tongyeong, Gyeongnam 650-160, South Korea; School of Chemical Engineering, The University of Adelaide, Adelaide, SA 5005, Australia. Electronic address: mdjulker9@gmail.com.
authors.forename: Md J
authors.initials: MJ
authors.lastname: Nine
authors.affiliation: Department of Energy and Mechanical Engineering, The Institute of Marine Industry, Cheondaegukchi-Gil 38, Tongyeong, Gyeongnam 650-160, South Korea.
authors.forename: Hanshik
authors.initials: H
authors.lastname: Chung
authors.affiliation: Department of Energy and Mechanical Engineering, The Institute of Marine Industry, Cheondaegukchi-Gil 38, Tongyeong, Gyeongnam 650-160, South Korea.
authors.forename: Md Riyad
authors.initials: MR
authors.lastname: Tanshen
authors.affiliation: Department of Biomedical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia.
authors.forename: N A B Abu
authors.initials: NA
authors.lastname: Osman
authors.affiliation: Department of Energy and Mechanical Engineering, The Institute of Marine Industry, Cheondaegukchi-Gil 38, Tongyeong, Gyeongnam 650-160, South Korea.
authors.forename: Hyomin
authors.initials: H
authors.lastname: Jeong
mesh_terms: D003300:Copper; D006358:Hot Temperature; D053768:Metal Nanoparticles; D010316:Particle Size; D012834:Silver; D013535:Suspensions; D013814:Thermal Conductivity; D014867:Water
chemical_list: D013535:Suspensions; D014867:Water; D012834:Silver; D003300:Copper
keywords: Deposition; Heat transfer; Metal nanofluids; Oxidation; Thermal conductivity