The document discusses nanofluids and their applications. It describes how nanofluids are fluids containing nanoparticles that can enhance heat transfer properties more than conventional fluids. Some key applications discussed include using nanofluids for cooling in engines, drilling operations in the oil industry, enhanced oil recovery, and improving the properties of enamels. The document provides details on the enhanced thermal conductivity of nanofluids and their potential to allow for more efficient heat transfer in various industrial systems and processes.
Nanofluids are now developing technology in main purpose heat transfer stream. In paper has brief information on the introduction and preparation methods of nanofluids. This paper prepared from the study of online resources
Nanofluids are now developing technology in main purpose heat transfer stream. In paper has brief information on the introduction and preparation methods of nanofluids. This paper prepared from the study of online resources
EFFECT OF (AL2 O3) NANOFLUID ON HEAT TRANSFER CHARACTERISTICS FOR CIRCULAR FI...IAEME Publication
In the present work Experimental investigation of heat transfer enhancement in double tube heat exchanger and circular finned double tube heat exchanger. Experimental work included to design heat exchanger and manufacture eight circular fins made of copper of (66mm) outer diameter, (22mm) inner diameter, (1mm) thickness and (111.11mm) distance between fins.
Preparation and Stability of Nanofluids-A ReviewIOSR Journals
Nanofluid, a simple product of nanotechnology has become a topic of attraction due to its
extraordinary heat transfer performance in various areas including cooling, power generation, defense,
nuclear, space, microelectronics and biomedical appliances. However, preparation and stabilization of such
fluids are indeed a matter of concern for better understanding. For the last decade numerous research and
development works have been done in the synthesis and stability of such materials. In this contribution, a brief
review has been presented to provide an update about the preparation and stabilization methods of nanofluids
Enhancement of rate of heat transfer using nano fluidsSharathKumar528
Nano fluids as coolants and lubricants is still very primitive in technology. This presentation explores the future of nano fluids for enhanced heat transfer.
NATURAL CONVECTIVE HEAT TRANSFER BY Al2O3 &PbO NANOFLUIDSAlagappapandian M
In this presentation related about natural convective heat transfer incresed by using different nano particles. in this fluid is called nanofluids. Nanofluids improve the heat transfer rate of base fluid.
Slides of invited talk on ALD for MEMS at the AVS-ALD conference ALD 2009 Monterey, California, USA
---
Full reference:
R. L. Puurunen, M. Blomberg, H. Kattelus, ALD layer in MEMS fabrication, 9th International Conference on Atomic Layer Deposition “ALD 2009”, Monterey, California, July 19-22, 2009. Invited talk.
EFFECT OF (AL2 O3) NANOFLUID ON HEAT TRANSFER CHARACTERISTICS FOR CIRCULAR FI...IAEME Publication
In the present work Experimental investigation of heat transfer enhancement in double tube heat exchanger and circular finned double tube heat exchanger. Experimental work included to design heat exchanger and manufacture eight circular fins made of copper of (66mm) outer diameter, (22mm) inner diameter, (1mm) thickness and (111.11mm) distance between fins.
Preparation and Stability of Nanofluids-A ReviewIOSR Journals
Nanofluid, a simple product of nanotechnology has become a topic of attraction due to its
extraordinary heat transfer performance in various areas including cooling, power generation, defense,
nuclear, space, microelectronics and biomedical appliances. However, preparation and stabilization of such
fluids are indeed a matter of concern for better understanding. For the last decade numerous research and
development works have been done in the synthesis and stability of such materials. In this contribution, a brief
review has been presented to provide an update about the preparation and stabilization methods of nanofluids
Enhancement of rate of heat transfer using nano fluidsSharathKumar528
Nano fluids as coolants and lubricants is still very primitive in technology. This presentation explores the future of nano fluids for enhanced heat transfer.
NATURAL CONVECTIVE HEAT TRANSFER BY Al2O3 &PbO NANOFLUIDSAlagappapandian M
In this presentation related about natural convective heat transfer incresed by using different nano particles. in this fluid is called nanofluids. Nanofluids improve the heat transfer rate of base fluid.
Slides of invited talk on ALD for MEMS at the AVS-ALD conference ALD 2009 Monterey, California, USA
---
Full reference:
R. L. Puurunen, M. Blomberg, H. Kattelus, ALD layer in MEMS fabrication, 9th International Conference on Atomic Layer Deposition “ALD 2009”, Monterey, California, July 19-22, 2009. Invited talk.
NUMERICAL INVESTIGATION OF NATURAL CONVECTION HEAT TRANSFER FROM CIRCULAR CYL...IAEME Publication
In the present work, the enhancement of natural convection heat transfer utilizing nano fluids as working fluid from horizontal circular cylinder situated in a square enclosure is investigated numerically. Different types of nano particles were tested. The types of the nano fluids are Cu, Al2O3 and TiO3 with water as base fluid. A model is developed to analyze heat transfer performance of nano fluids inside an enclosure taking into account the solid particle dispersionrs on the flow and heat
transfer characteristics.
Effect of nanofluid on heat transfer characteristics of double pipe heat exch...eSAT Journals
Abstract A nanofluid is a suspension of nano sized particles made up of metal, oxides or carbides of size up to 100 nm in a base fluid of water, ethylene glycol or oil. Recently large numbers of experiments have been are carried out to evaluate the effect of nanofluid in enhancement of the heat transfer rate in various heat exchangers. The heat transfer enhancement using nanofluid mainly depends on type of nanoparticles, size of nanoparticles, shape of nanoparticles, type of base fluid and concentration of nanoparticles in the base fluid. In the present paper, an experimental evaluation has been carried out to determine the effect of various concentration of CuO nanoparticles mixed in water on heat transfer characteristics of double pipe heat exchanger for parallel flow and counter flow arrangement. The volume concentrations of CuO nanofluid prepared by two step method are 0.002 %, 0.003% and 0.004 %. The conclusion derived for the study is that overall heat transfer coefficient increases with increase in volume concentration of CuO nanoparticle compared to water which have been validated by theoretical prediction also. Keywords: Nanofluid, Heat Transfer Characteristics, Double Pipe Heat Exchanger, CuO Nanoparticles
NUMERICAL INVESTIGATION OF NATURAL CONVECTION HEAT TRANSFER FROM CIRCULAR CYL...IAEME Publication
In the present work, the enhancement of natural convection heat transfer utilizing nanofluids as working fluid from horizontal circular cylinder situated in a square enclosure is investigated numerically. The type of the nanofluid is the water-based copper Cu. A model is developed to analyze heat transfer performance of nanofluids inside an enclosure taking into account the solid particle dispersionrs on the flow and heat transfer characteristics. The study uses different Raylieh
numbers (104 , 105 , and 106 ), different enclosure width to cylinder diameter ratios W/D (1.667, 2.5 and 5) and volume fraction of nanoparticles between 0 to 0.2. The work included the solution of the governing equations in the vorticity-stream function formulation which were transformed into body fitted coordinate system
ENHANCEMENT OF HEAT TRANSFER IN SHELL AND TUBE EXCHANGER USING NANO FLUIDS Vineeth Sundar
Nano fluid is a new engineering fluid which could improve the performance of heat exchanger.
The aim of this paper is to study the effect of different particle shapes (cylindrical, bricks, blades, and platelets) on the overall heat transfer coefficient, heat transfer rate and entropy generation of shell and tube heat exchanger with different baffle angles and segmental baffle.
NANOTECHNOLOGY IN HIGH YIELD STRESS SMART FLUIDS- A REVIEW.ijiert bestjournal
Electrorheological (ER) and Magnetorheological (MR) nano-fluids show dramatic and tunable changes in their rheological properties und er external magnetic or electric field strength respectively. These nano-fluids can be eff ectively incorporated in various engineering applications like shock absorber,dampe rs,clutches etc. The major problem to use these nano-fluids practically is their low y ield strength and problem of sedimentation. In this paper various smart nano-flu ids (ER & MR) have been studied. Special attention is given on development of stable,re-dispersible,durable,high yield stress smart nano-fluids with low sedimentation rat e. In this paper these nano-fluids are reviewed along with their rheological characteristi cs under external fields.
DeltaTi Consortium research activities focuses on deployment on the market new embedded system with thermoelectrical property based on nanostructured Si-based Alloy for cooling\thermogenerations into embedded ICs
Nanoscale-based Concepts for Innovative and Eco-Sustainable Constructive Mate...teixeiravasco
Invited talk at Conference Dubai Nanotech 2013. Nanoscale-based Concepts for Innovative and Eco-Sustainable Constructive Materials: Challenges and Opportunities for Energy and Environment Applications.
Economic impact of Nanotechnology. 1-Development of smart coatings for window IR control
2-Flexible smart multilayers for coloration & shading
3-Solar Tiles - photovoltaics thin films integrated on roof tiles and ceramic facades
4-Development of novel asphalt pavements with photocatalytic ability (with self-cleaning and pollution reduction functions)
We'd like to understand how you use our websites in order to improve them. Re...Pawan Kumar
The present work demonstrates for the first time the facile fabrication of TiO2 nanotube arrays (TNTAs) by a fluoride-free solid-state anodization process using LiClO4 containing solid polymeric electrolyte. The resulting nanotubes were tested for photoelectrochemical water splitting. The elimination of liquid electrolytes in electrochemical anodization constitutes a paradigm shift for the formation of nanoporous and nanotubular metal oxides. Our results open a new area of research that uses the distinctive properties of solid polymer electrolytes to achieve targeted doping and nano-morphologies. Characterization of the grown TNTAs indicated solid state anodized TNTAs to consist purely of the anatase phase of titania. The solid-state anodization process provides several advantages over conventional liquid electrolytes such as easy handling and processing, better charge transport, environmentally benign …
2014 polymer activation by reducing agent absorption as a flexible tool for t...Alexandra Bautista
Electroless plating is a powerful wet-chemical method for the fabrication
of metal thin films on arbitrarily shaped substrates [1]. Despite its
relative simplicity just involving the immersion of a work piece in a
deposition solution, electroless plating is suitable for the creation of
macroscopic [1] aswell as intricate nanoscale structures [2–5]. Depending
on the type of substrate and depositedmetal, the obtained materials
can be utilized in various fields, including electronics, wear and corrosion
resistance, medical technology and catalysis [1,6]. The special
properties of electrolessly plated metal nanomaterials give rise to
particularly interesting applications such as molecular separation
[4] or microreactors
It is a nanotechnology question. In which you are able to pick one m.pdfarihantstoneart
It is a nanotechnology question. In which you are able to pick one material for both questions or
one material for question one and another for question two.
Solution
Energy is of great importance in human life because of its benefits as the main resource for
human activity.
The application of nano technology or nano material in the field of energy, which involves
lithium-ion battery, fuel cell, light emitting diode (LED), ultra-capacitor, and solar cell
(including Grätzel cell).
Nanotechnology will bring significant benefits to the energy sector, especially to energy storage
and solar energy. Improved materials efficiency and reduced manufacturing costs are just two of
the real economic benefits that nanotechnology already brings these fields and that’s only the
beginning. Battery storage capacity could be extended, solar cells could be produced cheaper,
and the lifetime of solar cells or batteries for electric cars could be increased, all thanks to
continued development of nanotechnology.
The following nanomaterial technologies will be of particular importance: \"organic and printed
electronics\", \"nano-coatings\", \"nano-composites\", \"nano-fluids\", \"nano-catalysts\",
\"nanocarbons\" and \"nano-electrodes\".
Nanocomposites can be found in nano-structured solar cells and PV (e.g. in polymer-inorganic
PV cells, or as polymer gel electrolytes in dye-sensitized solar cells DSSC or quantum-dot
sensitized solar cells QDSSC) . Nanocomposites are also used for the capture of energy in
silicon-based solar cells, typically in the form of nanowires Nanocomposites can also be found in
antirefl ection coatings and higher solar transmittance coatings on collector glazing (e.g. Ti-Si-O
fi lms via sol-gel-method) In the fi eld of energy storage the advantages of nanocomposites are
needed in thin, fl exible energy storage devices with nanocomposite units, e.g. supercapacitors,
Li-ion batteries and hybrid devices Nanotechnology in the sectors of solar energy and energy
storage Additionally, nanocomposites can be used in the process of semiconductor-assisted
photocatalysis for fuel production in order to obtain solar hydrogen or methanol For example, the
nanocomposites applied here are TiO2 -Gold composite nanoparticles or semiconductor-
semiconductor composites Another fi eld of application lies in the wind energy sector, where
lightweight nanocomposite materials are mainly used for rotor blades.
nanocomposites can be found in nano-structured solar cells and PV (e.g. in polymer-inorganic
PV cells, or as polymer gel electrolytes in dye-sensitized solar cells DSSC or quantum-dot
sensitized solar cells QDSSC) Nanocomposites are also used for the capture of energy in silicon-
based solar cells, typically in the form of nanowires . Nanocomposites can also be found in
antirefl ection coatings and higher solar transmittance coatings on collector glazing (e.g. Ti-Si-O
fi lms via sol-gel-method) . In the fi eld of energy storage the advantages of nanocomposites .
In this presentation i have described about nanotechnology in present and future automobiles.And i also gave applications regarding nanotechnology in automobiles.
1. Tec Star S.r.l.
Viale Europa, 40 – 41011 Campogalliano (MO), Italy
Tel. +39059 526845 – Fax +39059 527000
Nanocomposite Materials: Nanofluids
Dr. Alberto Borghi
Tec Star Srl - President | CEO
2. Tec Star S.r.l.
Viale Europa, 40 – 41011 Campogalliano (MO), Italy
Tel. +39059 526845 – Fax +39059 527000
Heat transfer: water and molten salts
Concentrated Solar Power
SEM pictures of
nanofluids based on
molten salts (NaNO3
– KNO3) with
different percentages
of nanoparticles.
District heating
3. Tec Star S.r.l.
Viale Europa, 40 – 41011 Campogalliano (MO), Italy
Tel. +39059 526845 – Fax +39059 527000
The correlations between the nanofluid engineering
parameters and the nanofluid properties are schematically
presented in the Figure.
Due to the complexity of the nanofluid systems, manipulation
of the system performance requires identification of critical
parameters and properties of nanofluids.
(Elena V. Timofeeva et al., Nanoscale Research Letters 2011, 6:182)
Nanofluids for heat transfer
Thermal conductivity enhancement for different
nanofluids; the data points on the left-hand side of the
band are for nanofluids made of metal nanoparticles and
carbon nanotubes, whereas those on the right-hand side
of the band are for nanofluids made of metal oxide and
carbide nanoparticles. The width of the band represents
over-lapping between the two groups.
(V.I. Terekhov et al. Thermophysics and Aeromechanics, 2010, Vol.
17, No. 1)
4. Tec Star S.r.l.
Viale Europa, 40 – 41011 Campogalliano (MO), Italy
Tel. +39059 526845 – Fax +39059 527000
The table presents engineering parameters in a separate column and the nanofluid properties listed in rows.
Each cell in the table represents the strength of the effect of a particular parameter to the nanofluid’s
property with “x”, “▲”, “○”, and “■” indicating no, weak, medium, and strong dependence, respectively,
that were scored as 0.0, 0.25, 0.5, and 1.0 correspondingly.
The relative importance of each nanofluid parameter can be estimated as a sum of the gained scores in the
table.
The nanoparticle concentration, base fluid, and particle size appear to be the most influential parameters for
improving the heat transfer efficiency of nanofluid.
Nanofluids for heat transfer
(Elena V. Timofeeva et al., Nanoscale Research Letters 2011, 6:182)
5. Tec Star S.r.l.
Viale Europa, 40 – 41011 Campogalliano (MO), Italy
Tel. +39059 526845 – Fax +39059 527000
Nanofluids: nanocoolants
The nanofluid can be used as "nanocoolants" enhancing heat transfer more than several times better
than the best competing fluid.
Engine coolants (ethylene glycol/water mixtures), engine oils, automatic transmission fluids, and other
synthetic high-temperature heat transfer fluids currently possess inherently poor heat transfer
capabilities, they could benefit from the high thermal conductivity offered by nanofluids.
Engines designed to take advantage of nanofluids' cooling properties would be able to run at more
optimal temperatures.
Nanofluids would allow for smaller, lighter radiators, pumps, and other components. Vehicles that
weigh less could travel further on the same amount of fuel (i.e., get more miles per gallon).
Properties of nanofluids:
Ultra-high thermal conductivity
Long-term stability
Extremely small particles do not clog channels
Usable in existing applications such as radiators, HVAC and electronics
6. Tec Star S.r.l.
Viale Europa, 40 – 41011 Campogalliano (MO), Italy
Tel. +39059 526845 – Fax +39059 527000
Surface
atoms
Nanoparticles
Heat transfer fluid in a pipe
Heat transfer fluid in a pipe
Nanoparticles flow while microparticlessink
The relatively large mass of the
microparticlescan damage the
pipe’s wall.
Nanoparticles have
about 20% of their
atoms near the
surface, allowing them
to absorb and transfer
heat efficiently
Microparticles
have most of their
atoms beneath the
surface, where tey
cannot participate
in heat transfer
Microparticles
7. Tec Star S.r.l.
Viale Europa, 40 – 41011 Campogalliano (MO), Italy
Tel. +39059 526845 – Fax +39059 527000
Nanofluids: smart fluid for drilling
Drilling and well completion sectors are other two oil
branches where the benefits of nanofluids and
nanomaterials application are already tangible.
Nanotechnology has opened the door to the development
of a new generation of fluids defined as “smart fluids” for
drilling, production and stimulation-related applications.
Thanks to the exceptionally high surface to volume ratio,
nanofluids and nano-based additives exhibit major
interaction with the surrounding environment even at very
low concentrations. Such smart fluids will further enhance
drilling by adding benefits such as wettability alteration,
advanced drag reduction and sand consolidation
8. Tec Star S.r.l.
Viale Europa, 40 – 41011 Campogalliano (MO), Italy
Tel. +39059 526845 – Fax +39059 527000
Nanofluids: Enhanced Oil Recovery
Enhanced Oil Recovery (EOR) is important because of the recent global rise in energy demand
which is expected to be met by the oil and gas industry.
The ability of nanoparticles to alter certain factors in the formation and in oil properties can be
taken advantage of to enhance recovery.
The mechanisms through which oil is enhanced using nano include change of rock wettability,
reduction of interfacial tension, reduction of oil viscosity, reduction of mobility ratio and
permeability alterations.
Some nanoparticles application in EOR will maximize recovery and boost hydrocarbon production.
9. Tec Star S.r.l.
Viale Europa, 40 – 41011 Campogalliano (MO), Italy
Tel. +39059 526845 – Fax +39059 527000
Nanofluids for enamel
WaAlOx – Water-based Nanofluid for self-mending enamel:
• WaAlOx is a nanoparticle based product for water-based
porcelain enamel for steel (in particular for low carbon steel) .
• Mixed with a glazed enamel enhances adhesion, providing a self-
mending effect against brittle crack propagation.
Field of application:
Effects of the nanoparticles on amount and size of dendrites
at the enamel-steel interface during the firing stage
INCREMENT OF MECHANICAL PROPERTIES:
•mechanical resistance to bending and impact loads
•wear and scratch resistance
•low peeling effect on heavily deformed samples
•low time propagation of cracks on impacted samples
heat exchanger corrosion control of the heating elements is a major topic
complex geometries extraordinary adhesion and resistance to bending
10. Tec Star S.r.l.
Viale Europa, 40 – 41011 Campogalliano (MO), Italy
Tel. +39059 526845 – Fax +39059 527000
Contacts
Dr. Alberto Borghi
borghi@tec-star.it
TEC STAR Srl
Viale Europa, 40
41011 Campogalliano (MO) - Italy
Tel (+39)059.526845
Fax (+39)059.527000