Browse Topic: Cleaning
Researchers have taken the first steps toward finding liquid solvents that may someday help extract critical building materials from lunar and Martian rock dust, an important piece in making long-term space travel possible
This specification covers a shampoo type carpet cleaner in the form of a liquid
This specification covers insecticides for use in disinsection of aircraft as required on international passenger flights
This specification covers disinfectants or chemicals for use in disinfecting aircraft after carrying livestock
Today, advancements in industrial laser cleaning automation show great promise in boosting productivity and safety when rust and contaminant removal or surface preparation is required for higher volumes of components and equipment
As aerospace engineers push the boundaries of new frontiers, the need for advanced materials that can withstand the rigorous demands of these advanced applications is relentless. These materials go beyond functionality; it is about ensuring reliability in the skies, where failure is not an option. Fluorosilicone can help do exactly that. In the 1960s, the U.S. Air Force noticed that conventional silicone-based sealants, coatings, and other components degraded rapidly when exposed to fuels, de-icing fluids, and other hydrocarbon-based solvents. Dimethyl-based silicones are non-polar and easily absorb hydrocarbon-based solvents, which may result in material swelling, mechanical weakening, and ultimately, failure
This study aims to design a supersonic ejector, referred to as a liquid spray gun, with a simple operating procedure for producing an aerosol spray with adjustable droplet size distributions. A CFD model was developed to determine the influence of nozzle exit position and the primary air pressure on the supersonic patterns formed within the ejectors, providing a valuable insight into their internal physics. Based on the single-phase numerical results, at an air primary pressure of 2 bar, the flow may not reach a choking condition, possibly resulting in unstable ejector operation. However, at pressures exceeding 5 bar, the jet patterns emerging from the primary nozzle cause flow separation or the formation of vortex rings. This phenomenon leads to a flow configuration comparable to the diameter of the mixing tube, thereby reducing the available area for entrainment of suction flow. The suitable ejector was identified with a nozzle exit position of 13 mm and a primary pressure ranging
Usually hosted in Southern California, the Advanced Clean Transportation (ACT) Expo moved about 265 miles (425 km) north and east for its latest edition, taking place in Las Vegas from May 20-23. Interestingly, that distance challenges the range limits of most Class 8 battery-electric trucks, particularly if traversing hilly terrain or hauling heavy loads. One electric truck capable of covering such a stretch - with its estimated range of up to 500 miles (805 km) fully loaded at 82,000 lb GCW - is the Tesla Semi, which made its trade-show debut at the ACT Expo. “Achieving strong range-to-mass ratios is only possible with a dedicated, purpose-built, ground-up electric platform - exactly what the Semi is. There's no wasted space, the powertrain and the vehicle work hand in hand,” Dan Priestley, senior manager of engineering for the Tesla Semi, said during a keynote in Las Vegas
When it comes to making batteries that last longer, a team of researchers including engineers at Brown University and Idaho National Laboratory believes the key might be in how things get clean — specifically how soap works in this process
This specification covers one type of carpet cleaner in the form of a liquid
Billions of people around the world lack access to clean, drinkable water. A research team led by engineers at The University of Texas at Austin has developed a new water filtration system using locally sourced materials for members of the Navajo Nation in the Southwest
The lithium-ion batteries used to power electric vehicles (EVs) are key to a clean energy economy. But their electrodes are usually made using a wet slurry with toxic solvents, an expensive manufacturing approach that poses health and environmental risks
Dubbed an “engineered living material,” a new type of material developed at the University of California San Diego could offer a sustainable and eco-friendly solution to clean pollutants from water
In 1978, NASA scientist Donald J. Kessler theorized that an increasing amount of space pollution would lead to more collisions between objects in orbit, and thus more debris — the Kessler Syndrome. Multiple teams of researchers at USC Information Sciences Institute (ISI), a unit of the Viterbi School of Engineering, are working on solutions
In Penn’s Clean Energy Conversions Lab, researcher Peter Psarras and colleagues are repurposing waste from industrial mines, storing carbon pulled from the atmosphere into newly formed rock. The team sees great environmental potential in mine tailings, the sand and sludge left behind after the sought-after ore gets removed. With samples in the lab, they’re trying to determine just how much calcium and magnesium each contains, how to best carbonate it with CO2, how and where they can store the result, and whether the process is scalable
Chemical Vapor Deposition (CVD) and Atomic Layer Deposition (ALD) processes deposit material on all surfaces in a process chamber. Over time, the thickness of these deposits increases to the point that material begins to delaminate, producing gas-phase particulates that negatively impact process yield. Remote and in situ chemical etching processes are used to periodically remove these deposits from chamber walls, maintaining chamber cleanliness
The startup plans to apply lessons learned in Europe to the U.S. market, bringing a “small fleet” of electric trucks for potential customers by the end of the year. Volta Trucks has been operating its all-electric Volta Zero delivery trucks in Europe for three years. Now, the map is expanding. Fleet operators soon will be able to get behind the wheel of a Class 6 or 7 Zero in the U.S., adding to a growing list of electric options for moving freight. Volta displayed a Zero at the 2023 Advanced Clean Transportation (ACT) Expo in Anaheim, California, in May as a sort of ambassador. Volta will tour this truck around the U.S. for a few months before bringing over a “small fleet” for potential customers to test out and perhaps integrate into their operations before the end of the year, according to Volta Trucks CEO Essa Al-Saleh. It's all part of a dramatic shift towards electrification throughout the industry, he said
This specification covers a general purpose disinfectant in the form of a concentrated liquid to be used diluted in accordance with label instructions
This specification covers a cleaning/scale removing compound in the form of a liquid concentrate or gel
This SAE Recommended Practice pertains to blast cleaning and shot peening and provides for standard cast shot and grit size numbers. For shot, this number corresponds with the opening of the nominal test sieve, in ten thousandths of inches1, preceded by an S. For grit, this number corresponds with the sieve designation of the nominal test sieve with the prefix G added. These sieves are in accordance with ASTM E11. The accompanying shot and grit classifications and size designations were formulated by representatives of shot and grit suppliers, equipment manufacturers, and automotive users
This specification covers a cleaner in the form of a liquid
In this paper, an innovative EGR valve, containing an integrated self-cleaning function to mitigate the progressive buildup of carbon deposits, is described. Conventional EGR valves use Butterfly and Poppet mechanisms to open and close a round shaped exhaust gas port with limited ability to remove exhaust carbon deposits from the affected surfaces and mechanical elements. The self-cleaning EGR valve, instead, combining both rotational and linear motions, continuously sweeps its internal passages while delivering the gas flow, removing the carbon deposits before they can adhere to the internal surfaces
This recommended practice is intended to provide general guidelines for the selection and proper use of cleaning and disinfecting product characteristics acceptable for use on vehicle interiors and exterior touch points (cleaning before disinfecting being best practice in general for vehicles, as with other situations), and the effectiveness of the disinfecting products with certain characteristics, as well as indicating the product characteristics that will not cause damage to those surfaces
This SAE Aerospace Recommended Practice (ARP) provides processes for achieving the required cleanliness standards during the fabrication, assembly, and functional test of aircraft hydraulic systems. It covers exclusion and removal of solid and liquid contaminants from tubing during manufacture and final assembly, flushing of the installed system, and final checks to ensure cleanliness requirements are met
Sustainable energy is a cornerstone of the global effort to reduce reliance on fossil fuels. Research and development work continue to deliver cleaner, more efficient, and more diverse ways of generating the energy we need to power modern society. As we improve our ability to produce clean energy, we should also consider the holistic environmental impact of power systems that convert energy into work — driving our cars, trucks, airplanes, and other machines
This SAE Aerospace Recommended Practice (ARP) contains guidance to assist users by providing a method to install an AS6224/2 repair sleeve
Researchers have successfully developed a novel optical fiber design allowing the generation of rainbow laser light in the molecular fingerprint electromagnetic region. This new optical fiber with a self-cleaned beam, developed by researchers at Tampere University, can help in developing applications, such as cancer diagnostics. The finding was published in the journal Nature Communications
A new, highly sensitive system for detecting the production of hydrogen gas may play an important role in the quest to develop hydrogen as an environmentally friendly and economical alternative to fossil fuels, according to Penn State scientists
As it became clear at the onset of COVID-19 pandemic that the novel coronavirus was transmitted through the air, several companies realized their NASA-derived air-quality technologies could help combat its spread. And they soon found themselves overwhelmed by demand from schools to hospitals, shopping centers, office buildings, airports, and even buses
This SAE standard applies to all electric battery-powered machines that fall within the scope of SAE J2130-2
This SAE Standard applies to self-propelled sweepers and scrubbers as defined in SAE J2130-1 and J2130-2
Wireless IoT sensing devices can be placed on, in, or near people, equipment, infrastructure, and our environment. This gives us new tools to address the most urgent challenges of our 21st century world: from climate change, to ensuring clean energy, safe food, and foremost, caring for the health and well-being of an aging population. However, to achieve this, we need to address the ‘powering the IoT’ gap. That is, solutions need to run on batteries that outlive the IoT devices they power
The increased severity and prevalence of insoluble deposits formed on fuel injectors in gasoline direct injection (GDI) engines precipitates negative environmental, economic and healthcare impacts. A necessary step in mitigating deposits is to unravel the molecular compositions of these complex layered materials. But very little molecular data has been acquired. Mass spectrometry shows promise but most techniques require the use of solvents, making them unsuited for analyzing insoluble deposits. Here, we apply the high mass-resolving power and in-situ analysis capabilities of 3D OrbitrapTM secondary ion mass spectrometry (3D OrbiSIMS) to characterize deposits formed on the external tip and internal needle from a GDI injector. This is the first application of the technique to study internal GDI deposits. Polycyclic aromatic hydrocarbons (PAHs) are present up to higher maximum masses in the external deposit. Lubricating oil derived sulfonates are more intense in the internal deposit
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