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Technical Paper

Enhancement of Mechanical and Thermal Characteristics of Automobile Parts using Flax/Epoxy-Graphene Nanofiller Composites

2024-02-23
2023-01-5116
This research emphasizes the flax-based composite, developed using the hand lay-up method and augmented with three distinct graphene nanofillers. The graphene fillers are categorized as large nanorods (dimensions 3-5 nm, lengths 150-300 nm), small nano threads (dimensions 6-12 nm, lengths under 50 nm), and spherical particulates (dimensions 29-39 nm). ...Thermal conductivity evaluations of the composite, integrated with different graphene configurations, recorded enhancements ranging from 0.22 W/mK to 0.286 W/mK at a 2 wt.% graphene concentration. At an elevated 4 wt.% graphene addition, the small rod-shaped fillers demonstrated an impressive 59.6% enhancement over the flax/epoxy baseline, while the larger rod and spherical graphene nanoparticles showcased a 22.14% enhancement. ....% inclusion of spherical graphene nanoparticles is particularly effective in enhancing the ultimate tensile strength and fracture elongation of the epoxy matrix, registering improvements of 10% and 29% respectively.
Technical Paper

Experimental Study of Heat Transfer and Pressure Drop Phenomena in Kerosene-Graphene Nanoplatelets in a Mini Channel Heat Sink

2022-11-07
2022-01-5093
Our work intends to conduct experiments on kerosene-graphene nanoplatelets (GNP) nanofluid in a mini channel heat sink (MCHS) in two concentrations of graphene to verify the heat transfer and other hydrothermal phenomena. Many experiments have already been carried out on cooling electronic devices using mini channels along with various water-based nanofluids. ...The experiments with kerosene-GNP nanofluid are conducted in two different weight percentages of graphene, 0.01 and 0.03. The surfactant used for best visual stability is oleylamine, with an optimum mass ratio of 0.6 between it and graphene nanoparticles. ...The surfactant used for best visual stability is oleylamine, with an optimum mass ratio of 0.6 between it and graphene nanoparticles. A Peltier heater is attached to the bottom of the mini channel and provided with three different heat supplies of 8 W, 10 W, and 12 W, respectively, by varying the current and voltage of the direct current (DC) source.
Magazine

Aerospace & Defense Technology: February 2021

2021-01-28
Empowering Soldiers Through ISPDS Dispensable Gels vs Gap Filler Pads An Analysis of Thermal Management Materials Electronic Warfare Vying for Control of the Electromagnetic Spectrum More Bang for the Buck A New Design and Manufacturing Method for Deep Penetrating Bomb Cases A Comprehensive Way to Use Bonding to Improve RF Performance of Low Noise Amplifiers Army and Universities Deploy New Warfighter Communication Technology Radiation Effects on Electronics in Aligned Carbon Nanotube Technology (RadCNT) Characterizing the fundamental mechanisms and charge transport phenomena governing the interactions between ionizing and non-ionizing radiation with carbon-based (nanotube and graphene) field-effect transistors (FETs) devices and integrated circuits (ICs). An Ultrafast Testbed for Comprehensive Characterization of Photonics, Electronic, and Optoelectronic Properties of Integrated Nanophotonic Structures High-speed testing technology will enable advances such as new digital signal processing/computing platforms in the optical domain through the development of innovative high-speed and low-power nonlinear optical processing cores that can be co-integrated with digital signal processors to enable new functionalities.
Book

Solar Energy Harvesting: How to Generate Thermal and Electric Power Simultaneously

2016-01-01
Solar Energy Harvesting: How to Generate Thermal and Electric Power Simultaneously describes energy harvesting using a hybrid concentrating photovoltaic (PV) system with simultaneous thermal generation for energy storage. Several designs have been proposed to build a system that takes advantage of the entire solar spectrum through direct electric generation using concentrated light onto photovoltaics while generating thermal energy using wavelengths of light not captured by the PV cell. This title addresses the current technologies and state-of-the-art designs, as well as the methodologies, underlying physics, and engineering implications.
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