Minichannels Cooling Using MWNT Fin Structures and Al2O3 Nanofluid

2012 ◽  
Author(s):  
Jami Frances Tullius ◽  
Yildiz Bayazitoglu
Keyword(s):  
Surface Area ◽  
Thermal Performance ◽  
Heat Exchangers ◽  
Volume Ratio ◽  
Large Surface Area ◽  
Significant Enhancement ◽  
Cooling Methods ◽  
Al2o3 Nanofluid

Future innovations of electronics are bounded by the availability of effective cooling methods to remove heat that is generated. Micro- and minichannels, acting as heat exchangers, are effective in removing heat from small surfaces because of their large surface area to volume ratio [1]. Both micro pin finned structures [2,3] and nanofluids [4–6] have proven to provide significant enhancement in thermal performance in minichannels.

A Survey of Important Auxiliary Equations for Selected Compact Heat Exchanger

2005 ◽  
Author(s):  
Richard G. Carranza
Keyword(s):  
Heat Exchanger ◽  
Surface Area ◽  
Heat Exchangers ◽  
Volume Ratio ◽  
Compact Heat Exchanger ◽  
Fin Efficiency ◽  
Compact Heat Exchangers ◽  
Central Location

Important auxiliary equations are presented that are typically used in compact heat exchanger research. These relationships are presented only for selected compact heat exchangers — bare pipe, helically finned pipe, plate finned pipe, spined pipe, and plate exchangers. The equations primarily address issues relating to heat exchanger geometry, surface area to volume ratio, and fin efficiency. Furthermore, they are organized in a systematic manner and consolidated in one central location for easy reference.

Study on Reverse Micro emulsion Method Applied in Preparation of Catalyst MnBaAl11O19-δ for Dimethyl Ether Combustion

2010 ◽  
Vol 148-149 ◽  
pp. 1532-1537
Author(s):  
Qian Yu ◽  
Lin Yu ◽  
Gui Qiang Diao ◽  
Ming Sun ◽  
Ying Min Huang ◽  
...  
Keyword(s):  
High Activity ◽  
Surface Area ◽  
Dimethyl Ether ◽  
Sol Gel ◽  
Volume Ratio ◽  
Large Surface Area ◽  
Precipitation Method ◽  
Water Volume ◽  
Emulsion Method ◽  
Micro Emulsion

Reverse micro emulsion method showed some advantages in the preparation of the catalyst MnBaAl11O19-δ with large surface area and high activity, when compared with sol-gel method or co-precipitation method. The influences of water content in reverse micro emulsion on nanostructure catalyst MnBaAl11O19-δ were discussed in this paper. The catalyst MnBaAl11O19-δ was prepared by reverse microemulsion method with a system consisted of 55% of n-heptane, 15% of emulsifier OP-10, 15% of 1-octanol and 15% of water (volume ratio). It resulted in the catalyst a length of 10-30nm plated-like phase and large surface area of 106 m2/g. The catalyst was applied in dimethyl ether combustion and it showed high activity with T10% at 160 °C and T90% at 300 °C. The recycle reverse micro emulsion was reused to prepare the catalyst MnBaAl11O19-δ. The catalyst MnBaAl11O19-δ prepared with that, still showed large surface area of 65m2/g and high activity with T10% at 170 °C and T90% at 320 °C in dimethyl ether catalytic combustion.

A Study on Microfluidic Spinning Technology (MST) Used for Micro Fibre Fabrication

2021 ◽  
Vol 6 (2) ◽  
Author(s):  
Khan MKR ◽  
◽  
Hassan MN ◽  
Siddique AB ◽  
Begum HA ◽  
...  
Keyword(s):  
Reaction Kinetics ◽  
Surface Area ◽  
Volume Ratio ◽  
Basic Mechanism ◽  
Large Surface Area ◽  
Core Shell ◽  
Huge Amount ◽  
Fiber Production ◽  
Small Pore

Functional polymeric micro/nanofibers have gained considerable interest as promising materials for the structures that are potentially beneficial in lot of application areas as they possess excellent characteristics such as large surface-area-to-volume ratio, incredibly small pore dimensions etc. Microfluidic developments have currently shown a huge amount of opportunities as revolutionary approaches to create microfiber. By carefully regulating the flow and reaction kinetics in microchannel chip, microfluidic-spinning technology can be applied to generate fibers with tailored characteristics and polymorphic structures. However, this paper features the basic mechanism of micro-fiber production by microfluidic spinning Technology (MST) as well as the principle of Elcectro-Microfluidic Spinning Technology (EMST). Besides, core-shell fiber production by MST is also described in brief. Finally, the advantageous features, application areas and challenges of MST are reviewed briefly in this paper.

scholarly journals Application of Nanoparticles for Oil Recovery

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1063
Author(s):  
Ole Torsæter
Keyword(s):  
Surface Area ◽  
Oil Recovery ◽  
Chemical Reactivity ◽  
Petroleum Industry ◽  
Volume Ratio ◽  
Large Surface Area

Due to their large surface-area-to-volume ratio and enhanced chemical reactivity, nanoparticles have attracted interest among researchers in the upstream petroleum industry for oil recovery applications [...]

scholarly journals Quantum transport in three-dimensional metalattices of platinum featuring an unprecedentedly large surface area to volume ratio

2020 ◽  
Vol 4 (3) ◽  
Author(s):  
Yixuan Chen ◽  
Yunzhi Liu ◽  
Parivash Moradifar ◽  
Andrew J. Glaid ◽  
Jennifer L. Russell ◽  
...  
Keyword(s):  
Surface Area ◽  
Quantum Transport ◽  
Three Dimensional ◽  
Volume Ratio ◽  
Large Surface Area

Evaluation of Nanotechniques and Conventional Techniques for the Removal of Dioxins

2018 ◽  
Vol 9 (1) ◽  
pp. 79-84
Author(s):  
Vaishali V. Shahare ◽  
Rajni Grover ◽  
Suman Meena
Keyword(s):  
Soil Sample ◽  
Human Health ◽  
Surface Area ◽  
Contaminated Soil ◽  
Conventional Treatment ◽  
Volume Ratio ◽  
Soil Samples ◽  
Dioxins And Furans ◽  
Palladized Iron ◽  
The Impact

Background: The persistent dioxins/furans has caused a worldwide concern as they influence the human health. Recent research indicates that nonmaterial may prove effective in the degradation of Dioxins/furans. The nanomaterials are very reactive owing to their large surface area to volume ratio and large number of reactive sites. However, nanotechnology applications face both the challenges and the opportunities to influence the area of environmental protection. Objective: i) To study the impact of oil mediated UV-irradiations on the removal of 2,3,7,8-TCDD, 2,3,7,8-TCDF, OCDD and OCDF in simulated soil samples. ii) To compare the conventional treatment methods with the modern available nanotechniques for the removal of selected Dioxins/furans from soil samples. Methods: The present work has investigated an opportunity of the degradation of tetra and octachlorinated dioxins and furans by using oil mediated UV radiations with subsequent extraction of respective dioxins/furans from soils. The results have been compared with the available nanotechniques. Results: The dioxin congeners in the simulated soil sample showed decrease in concentration with the increase in the exposure time and intensity of UV radiations. The dechlorination of PCDD/Fs using palladized iron has been found to be effective. Conclusion: Both the conventional methods and nanotechnology have a dramatic impact on the removal of Dioxins/furans in contaminated soil. However, the nanotechniques are comparatively costlier and despite the relatively high rates of PCDDs dechlorination by Pd/nFe, small fraction of the dioxins are recalcitrant to degradation over considerable exposure times.

Functional Two-Dimensional Black Phosphorus Nanostructures towards Next-Generation Devices

2021 ◽  
Author(s):  
Mengke Wang ◽  
Jun Zhu ◽  
You Zi ◽  
Zheng-Guang Wu ◽  
Haiguo Hu ◽  
...  
Keyword(s):  
Surface Area ◽  
Biomedical Applications ◽  
Black Phosphorus ◽  
Large Surface Area ◽  
Two Dimensional ◽  
Next Generation

In recent years, two-dimensional (2D) black phosphorus (BP) has been widely applied in many fields, such as (opto)electronics, transistors, catalysis and biomedical applications due to its large surface area, tunable...

scholarly journals Experimental Investigation and Comparison of the Thermal Performance of Additively and Conventionally Manufactured Heat Exchangers

Metals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 574
Author(s):  
Ana Vafadar ◽  
Ferdinando Guzzomi ◽  
Kevin Hayward
Keyword(s):  
Surface Roughness ◽  
Thermal Performance ◽  
Heat Exchangers ◽  
High Efficiency ◽  
Cooling System ◽  
Fluid Dynamic ◽  
Dynamic Performance ◽  
Experimental Studies ◽  
Manufacturing Method ◽  
Industrial Sectors

Air heat exchangers (HXs) are applicable in many industrial sectors because they offer a simple, reliable, and cost-effective cooling system. Additive manufacturing (AM) systems have significant potential in the construction of high-efficiency, lightweight HXs; however, HXs still mainly rely on conventional manufacturing (CM) systems such as milling, and brazing. This is due to the fact that little is known regarding the effects of AM on the performance of AM fabricated HXs. In this research, three air HXs comprising of a single fin fabricated from stainless steel 316 L using AM and CM methods—i.e., the HXs were fabricated by both direct metal printing and milling. To evaluate the fabricated HXs, microstructure images of the HXs were investigated, and the surface roughness of the samples was measured. Furthermore, an experimental test rig was designed and manufactured to conduct the experimental studies, and the thermal performance was investigated using four characteristics: heat transfer coefficient, Nusselt number, thermal fluid dynamic performance, and friction factor. The results showed that the manufacturing method has a considerable effect on the HX thermal performance. Furthermore, the surface roughness and distribution, and quantity of internal voids, which might be created during and after the printing process, affect the performance of HXs.

Research on metallic chalcogen-functionalized monolayer-puckered V2CX2 (X = S, Se, and Te) as promising Li-ion battery anode materials

2021 ◽  
Author(s):  
Chunmei Tang ◽  
Xiaoxu Wang ◽  
Shengli Zhang
Keyword(s):  
Surface Area ◽  
Anode Materials ◽  
Large Surface Area ◽  
Two Dimensional ◽  
Li Ion Batteries ◽  
Li Ion Battery ◽  
Li Ion ◽  
Battery Anode

Two-dimensional MXene nanomaterials are promising anode materials for Li-ion batteries (LIBs) due to their excellent conductivity, large surface area, and high Li capability.

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