Applications of Nanofluids: Current and Future

Wong, Kaufui V.; Leon, Omar De

doi:10.1201/9781315163574-6

Cited by 112 publications

(94 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Due to the high thermal conductivity of solids, the addition of nanomaterials (such as ceramics, metals, alloys, semiconductors and carbon derivatives) is a way of increasing the thermal conductivity of conventional fluids, resulting in a fluid composite with higher heat exchange efficiency. 6,12,13 The addition of nanomaterials to conventional refrigeration fluids in small volumetric fractions produces systems with higher colloidal stability when compared to micrometric systems. In addition, nanomaterials can flow smoothly without causing clogging of refrigeration systems and provide improvements in the thermal properties of the fluid.…”

Section: Introductionmentioning

confidence: 99%

“…[14][15][16] Nanofluids are produced by two different routes, designated as a one-step method and a two-step method. [4][5][6][7][8][9][10][11][12] In the onestep method, the nanomaterials were synthesized directly in a conventional cooling fluid, forming the nanofluid. The major advantage of this method is to avoid the formation of nanoparticle agglomerates, which favors the colloidal stability of the nanofluids.…”

Section: Introductionmentioning

confidence: 99%

“…8 Nanofluids are composites formed by the stable colloidal dispersion of nanomaterials (with a size less than 100 m) in a conventional cooling fluid. [3][4][5][6][7][8][9][10][11] Conventional fluids used in liquid refrigeration, such as water, ethylene glycol and oils, have low thermal conductivity (thermal conductivity of water 0.613 W/m·K at 300 K), while solid materials, on the other hand, have higher thermal conductivity values. Due to the high thermal conductivity of solids, the addition of nanomaterials (such as ceramics, metals, alloys, semiconductors and carbon derivatives) is a way of increasing the thermal conductivity of conventional fluids, resulting in a fluid composite with higher heat exchange efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5][6] The use of conventional refrigeration fluids has been enhanced to develop more efficient heat exchanger fluids. In this context, in the early 1990s, a new material class was conceived.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Aqueous Nanofluids Based on Copper MPA: Synthesis and Characterization

et al. 2018

View full text Add to dashboard Cite

The application and use of efficient cooling fluids have become increasingly important due to the increasing industrial and energy demand associated with the miniaturization of various electronic devices. The search for high-efficiency heat exchanger fluids in the early 1990s led to the development of a new class of refrigerants called nanofluids. The use of nanofluids is linked to obtaining stable colloidal dispersions which exhibit high thermal conductivity. For this purpose, the efficiency of a nanofluid will depend on the type of fluid used and the dispersed nanomaterial. In this work, a stable aqueous nanofluid based on mercaptopropionic acid-coated copper sulfide nanoparticles (Cu 2 S/MPA), synthesized by the chemical reduction method, was developed. The nanofluid presented colloidal stability in alkaline medium and an average increase of 36% in thermal conductivity for a volumetric fraction of 0.05%.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Aqueous Nanofluids Based on Copper MPA: Synthesis and Characterization

et al. 2018

View full text Add to dashboard Cite

show abstract

“…MWFs with nanoparticle additives have been widely investigated for the purpose of reducing the mechanical friction and wear between components obtaining very promising results [5][6][7][8][9][10][11][12][13][14]. For example, the wear scar diameters (WSDs) of a synthetic were selected based on a previous study by our group [33].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Anti-Wear Properties of Metalworking Fluids Enhanced with Halloysite Nanotubes

et al. 2017

View full text Add to dashboard Cite

Featured Application: nanoparticle additives for improving tribological properties of metalworking cutting fluids, enhancing tool life and surface finish in machining processes. Abstract:The study of nanoparticles as additives for metalworking fluids (MWFs) with applications in the metal removal processes, or machining, has received increasing attention due to the possible enhancements on tribological properties. In this study, low-cost and environmentally friendly nanoparticle additives of halloysite clay nanotubes (HNTs) were dispersed in metalworking fluids utilized for milling processes. Concentrations of 0.01, 0.05, 0.10 wt. % were incorporated into a mineral oil (MO) and a semi-synthetic fluid (SF) by ultrasonication. The anti-wear properties of metalworking nanofluids were characterized with a T-05 block-on-ring tribotester at a contact pressure of 0.5 GPa. Surface roughness of worn block materials was obtained with an optical 3D surface measurement system. Results showed that at a concentration of 0.10 wt. % HNTs block mass loss was lowered by 24% for the MO + HNTs nanofluids. For the SF + HNTs, a reduction of 63% and 32% in wear mass loss and coefficient of friction (COF), respectively, were found at the same concentration. The tribological enhancing mechanism for the applied contact pressure was proposed to be due to a reduction of the area of contact and nanoparticle sliding between surfaces with no HNT deposition, evidenced by energy dispersive spectrometry (EDS). Furthermore, surface roughness studies of worn blocks showed smoother surfaces with lower groove density with the addition of nanoparticle additives. The results of this study demonstrate that HNTs can improve the lubricity of metalworking cutting fluids used for machining processes, enhancing tool life and providing better surface finish of products.

show abstract