We exploit the combinatorial advantage of electrokinetics and tortuosity of a cellulose-based paper network on laboratory grade filter paper for the development of a simple, inexpensive, yet extremely robust (shows constant performance for 12 days) ‘paper-and-pencil’-based device for energy harvesting applications. We successfully achieve harvesting of a maximum output power of ∼640 pW in a single channel, while the same is significantly improved (by ∼100 times) with the use of a multichannel microfluidic array (maximum of up to 20 channels). Furthermore, we also provide theoretical insights into the observed phenomenon and show that the experimentally predicted trends agree well with our theoretical calculations. Thus, we envisage that such ultra-low cost devices may turn out to be extremely useful in energizing analytical microdevices in resource limited settings, for instance, in extreme point of care diagnostic applications.
Archive for the ‘energy’ category: Page 209
Dec 25, 2020
AT&T outage: Internet, 911 disrupted, planes grounded after Nashville explosion. Get the latest updates
Posted by Quinn Sena in categories: energy, internet, law enforcement
“Power is essential to restoring wireless and wireline communications, and we are working with law enforcement to get access to our equipment and make needed repair,” the statement said. “There are serious logistical challenges to working in a disaster area and we will make measurable progress in the hours and days ahead.
We’re grateful for the work of law enforcement as they investigate this event while enabling us to restore service for our customers.
The outages were reported several hours after an explosion in downtown Nashville that took place near an AT&T facility.
Dec 25, 2020
Scientists Invent a Flexible Device That Converts Wi-Fi Signals Into Electricity
Posted by Quinn Sena in categories: energy, internet
We can probably all agree that charging cables are just the worst, and that we’d love to have fewer of them in our lives. Now, a new invention might give us just that: engineers have developed a flexible device that harvests energy from Wi-Fi signals.
And not just harvest. It can then convert it into electricity that could be used to power devices, wire-and battery-free.
The device is what is known as a rectenna — a portmanteau of ‘rectifying antenna’ — which is a type of antenna that converts electromagnetic energy into direct current (DC).
Dec 25, 2020
SolarWinds Hack Infected Critical Infrastructure, Including Power Industry
Posted by Quinn Sena in categories: cybercrime/malcode, energy
The companies involved used compromised software, but it’s not clear if hackers entered their networks. Finding out could be difficult.
Dec 24, 2020
China Tests Hypersonic Jet Engine That Can Go 16 Times the Speed of Sound
Posted by Omuterema Akhahenda in categories: energy, transportation
Scientists in China claim to have built a hypersonic jet engine—called “sodramjet”—that can fly at 16 times the speed of sound. This means that an aircraft kitted out with such engines could fly anywhere in the world in two hours, according to the scientists. The test flight of a prototype was carried out in a wind tunnel in Beijing, China, and displayed excellent thrust, fuel efficiency, and operational stability. Led by Professor Zonglin Jiang of the Chinese Academy of Sciences’ Institute of Mechanics, the team’s findings were published in Chinese Journal of Aeronautics on Saturday.
Scientists in China have tested a prototype sodramjet engine in a hypersonic wind tunnel at nine times the speed of sound. Check it out here!
Dec 22, 2020
Tiny Turbine Catches Big City Wind
Posted by Raphael Ramos in categories: energy, food, sustainability
Can we morph cities into energy farms? We sure can now! This turbine catches wind from any direction and generates clean energy, even in dense urban areas!
Dec 22, 2020
US Energy Dept. Hearts Silicon for Next-Gen EV Batteries
Posted by Quinn Sena in categories: energy, policy, sustainability, transportation
There they go again. Just a few months ago the US Department of Energy tapped a startup called Group14 Technologies for a multi-million dollar R&D grant to usher in a new generation of high performance EV batteries, and now here comes Group14 with another $17 million in series B funding spearheaded by the South Korean battery expert SK Materials. If you guessed that means scaling up production for the mass market, you’re right on the money. The bigger question is why the Energy Department is determined to support the US electric vehicle industry, considering that White House policy has been aimed at supporting the US oil industry. Any guesses?
Dec 21, 2020
‘We think we’ve found the answer’: The ‘Supercell’ that could bring safe energy storage to New York
Posted by Quinn Sena in categories: business, energy
New York has among the world’s tightest rules on fire safety and regular readers of this site will be aware that that has had a big impact on the ability to site lithium-ion based battery energy storage systems (BESS) within the boundaries of the state’s urban regions.
While the development of large-scale systems is taking place in less densely populated upstate areas of New York, commercial and industrial (C&I) battery storage, which has been used elsewhere around the country to help businesses manage their energy costs and the wider network to adopt greater shares of renewables, has not really been able to gain a foothold.
A couple of weeks ago the New York Power Authority (NYPA) — a public-benefit corporation which serves around 25% of the state’s electric load — began trialling an energy storage system using lithium batteries based around start-up Cadenza Innovation’s ’Supercell’ architecture. Wrapping individual cells into a protective housing, the technology is a low-cost way to prevent thermal runaway from cascading through a battery rack and causing fires.
Dec 21, 2020
New engine capability accelerates advanced vehicle research
Posted by Saúl Morales Rodriguéz in categories: energy, transportation
In the quest for advanced vehicles with higher energy efficiency and ultra-low emissions, Oak Ridge National Laboratory researchers are accelerating a research engine that gives scientists and engineers an unprecedented view inside the atomic-level workings of combustion engines in real time.
The new capability is an engine built specifically to run inside a neutron beam line. This neutronic engine provides a unique sample environment that allows investigation of structural changes in new alloys designed for the environment of a high-temperature, advanced combustion engine operating in realistic conditions.
ORNL first unveiled the capability in 2017, when researchers successfully evaluated a small, prototype engine with a cylinder head cast from a new high-temperature aluminum-cerium alloy created at the lab. The experiment was the world’s first in which a running engine was analyzed by neutron diffraction, using the VULCAN neutron diffractometer at the Department of Energy’s Spallation Neutron Source, or SNS, at ORNL.
Dec 21, 2020
China’s electric car strategy is starting to go global – and the U.S. is lagging behind
Posted by Raphael Ramos in categories: energy, policy, sustainability, transportation
It seems competition is increasing.
BEIJING – In a future driven by electric vehicles, China is poised to dominate if the U.S. does not transform its automobile industry in coming years.
While California-based Tesla captured popular attention for electric cars, national policy in Beijing encouraged the launch of several rivals in China, the world’s largest auto market. Already, sales of electric cars and other new energy vehicles hit a record in September in China. Even Tesla launched a factory there last year, and is planning to sell made-in-China cars to Europe.