Journal ArticleDOI
Investigation on Convective Heat Transfer and Flow Features of Nanofluids
Yimin Xuan,Qiang Li +1 more
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TLDR
In this article, an innovative new class of heat transfer fluids can be engineered by suspending metallic nanoparticles in conventional heat-transfer fluids, which are expected to exhibit high thermal conductivities compared to those of currently used heat transfer fluid, and they represent the best hope for enhancing heat transfer.Abstract:
Low thermal conductivity is a primary limitation in the development of energy-efficient heat transfer fluids that are required in many industrial applications. In this paper we propose that an innovative new class of heat transfer fluids can be engineered by suspending metallic nanoparticles in conventional heat transfer fluids. The resulting {open_quotes}nanofluids{close_quotes} are expected to exhibit high thermal conductivities compared to those of currently used heat transfer fluids, and they represent the best hope for enhancement of heat transfer. The results of a theoretical study of the thermal conductivity of nanofluids with copper nanophase materials are presented, the potential benefits of the fluids are estimated, and it is shown that one of the benefits of nanofluids will be dramatic reductions in heat exchanger pumping power.read more
Citations
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Experimental test of an innovative high concentration nanofluid solar collector
Gianpiero Colangelo,Ernani Favale,P. Miglietta,Arturo de Risi,Marco Milanese,Domenico Laforgia +5 more
TL;DR: In this paper, a modified flat panel solar thermal collector was built and thermal efficiency was measured with two heat transfer fluids: distillated water and Al2O3-based nanofluid at high concentration of solid phase.
Journal ArticleDOI
An experimental study on CHF enhancement in flow boiling using Al2O3 nano-fluid
TL;DR: In this article, the zeta potentials of Al2O3 nano-fluids were measured and flow boiling CHF enhancement experiments were conducted under atmospheric pressure, and the CHF of nano-fluid was enhanced up to ∼70% in flow boiling for all experimental conditions.
Journal ArticleDOI
Optimization and comparison of double-layer and double-side micro-channel heat sinks with nanofluid for power electronics cooling
TL;DR: In this article, two advanced micro-channel structures, i.e., double-layer (DL) and double-side (sandwich) with water as coolant, are optimized and compared by computational fluid dynamics (CFD) study.
Journal ArticleDOI
Entropy analysis of Powell–Eyring hybrid nanofluid including effect of linear thermal radiation and viscous dissipation
TL;DR: In this article, the authors investigated flow, convective heat transport and volumetric entropy generation in a hybrid Powell-Eyring hybrid nanofluid and found that the heat transfer rate at the boundary is greatest for smallest value of the shape factor parameter.
Journal ArticleDOI
Experimental investigation of thermo-physical properties, convective heat transfer and pressure drop of functionalized graphene nanoplatelets aqueous nanofluid in a square heated pipe
Hooman Yarmand,Samira Gharehkhani,Seyed Farid Seyed Shirazi,Ahmad Amiri,Maryam Sadat Alehashem,Mahidzal Dahari,Salim Newaz Kazi +6 more
TL;DR: In this paper, a facile method is used for preparation of functionalized graphene nanoplatelets (f-GNP) nanofluids, and the surface characterization was performed by various techniques such as XRD, FESEM, FTIR and Raman.
References
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Book
Introduction to Heat Transfer
TL;DR: In this article, the physical concepts and methodologies of heat and mass transfer are explained for advanced undergraduate engineering majors, using a systematic method for problem solving and discusses the relationship of heat transfer to many important practical applications through examples and problems.
Journal ArticleDOI
Hydrodynamic and heat transfer study of dispersed fluids with submicron metallic oxide particles
Bock Choon Pak,Young I. Cho +1 more
TL;DR: In this article, the authors used a Brookfield rotating viscometer to measure the viscosities of the dispersed fluids with γ-alumina (Al2O3) and titanium dioxide (TiO2) particles at a 10% volume concentration.
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Thermal Conductivity of Heterogeneous Two-Component Systems
R. L. Hamilton,O. K. Crosser +1 more
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Measuring Thermal Conductivity of Fluids Containing Oxide Nanoparticles
TL;DR: In this paper, a transient hot-wire method was used to measure the thermal conductivity of a small amount of nanoparticles and the experimental results showed that these nanoparticles have substantially higher thermal conductivities than the same liquids without nanoparticles.
Journal ArticleDOI
Conceptions for heat transfer correlation of nanofluids
Yimin Xuan,Wilfried Roetzel +1 more
TL;DR: In this article, the authors proposed two different approaches for deriving heat transfer correlation of the nanofluid, and investigated the mechanism of heat transfer enhancement of the nano-fluid.