I love Johns quote "the government has always favored the rich man"--then the governments quote is exact opposite. I guess these guys need to communicate or understand each other a little better!!
www.youtube.com/watch?v=GuRtwPJaI_g
Joe
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I love Johns quote "the government has always favored the rich man"--then the governments quote is exact opposite. I guess these guys need to communicate or understand each other a little better!!
www.youtube.com/watch?v=GuRtwPJaI_g
Joe
That’s OK mate. I can help you with your clarity. Tesla (rich man’s toys), sells more cars in six months than Nissan has sold Leafs in 12 years on the market. It’s not a case of new tech starting expensive and getting cheaper. None of it is getting cheaper*. What’s happening is that ordinary people don’t want boring battery operated cars. They want Teslas and Porsche Taycans and Audi E-trons and Rivians. And if they can’t afford one of those, (rich man’s toys), they are buying petrol cars. The market is speaking loud and clear on this. So if you want your battery revolution to reach down to ordinary people, you need government to force it. If you are OK with governance by force, you should be pretty happy these days.Quote:
Originally Posted by John S
*Why aren’t battery cars getting cheaper, like say computer parts? Because contrary to urban legend, the existing battery technology is already mature. Ancient actually, by high-tech standards. Lithium ion is thirty years old. Electronic commutation, induction and PM motor tech is even older. Any further advances in those two spaces are going to be evolutionary, not revolutionary. The needed revolutionary tech would be something two orders of magnitude better than lithium ion. But that might as well be anti-gravity levitation technology for as close as we are to something like that.
-Peter
[QUOTE=Shaun K;3363110]What ? You say something John ?[/QUOTE
He likes to make noise.
It’s about electric propulsion still being inadequate.Quote:
Originally Posted by CUDA
The article tell it's own lies. It says:Quote:
Originally Posted by Stoker boy
Yet the article says it uses a fuel cell (hint: fossil) in addition to batteries. Fuel cells use fossil fuel to create electricity.Quote:
A future of fast, fossil-free ferries
As with that phony clickbait "Air Canada battery airliner" piece, There are some thing about this battery ferry that don't quite pass the smell test. The article is dated August 2021 and says that the ferries are supposed to be in service in 2022. Are they in service? The article calls them the "Beluga24". There is no wikipedia article on them. There are no youtube videos of one running. Do they even exist?
From the engineer perspective:
-fuel cell is NOT fossil free
-batteries would not be enough for all day reliable service at planing hull speeds
-the idea of a foil to provide lift and reduce drag is a good one... If it is ever to actually work as advertised, and there is not yet any evidence I can find that it does, the foil will be the saving grace... If they can engineer one big enough and strong enough. I ride a battery powered foil surfboard and once up on the foil, the thrust requirements go waaay down. It's super impressive. Of course in foil surfboarding, crashing is more acceptable than it would be in a commercial ferry boat.
===
By the way, the leading candidate for battery airline travel, the Eviation Alice made it's first test flight a day or two ago. It was just the test pilot and lasted eight minutes. The CEO of the company said: that it cannot meet it's goals with existing battery technology, it cannot meet it's goals with the existing design. It may not meet FAA certification standards for passenger carrying. Ever. At least he's honest.
Eviation is YEARS ahead of anybody else. At least they built something. And they are even one-for-two. Their first one burned to the ground in a lithium fire. But their second one has not. Yet. That clickbait Air Canada scam that half of social media fell for... they haven't even built a full scale cardboard model of one yet.
-Peter
Quote:
Originally Posted by CUDA
I do worry about you Mr. CUDA, you’re not able to think for yourself.
Electric is all about politics, carbon credits and epa credits
EV's will reduce pollution in cities
Correct. I don't think it's the end all/ be all answer to every issue. But this is where EV will be an asset. Short haul/ dedicated route delivery, and high density population cities.Quote:
Originally Posted by powerabout
Not sure I could do this, but kudos to Tony for doing something different. C2 is my favorite car. Thing is cool AF
https://insideevs.com/news/614820/ja...esla-corvette/
DOH! Now maybe it’s just because I’m into road racing, but why did they put the battery in the front instead of the rear? A blown opportunity to even the weight distribution or give it a rear bias. The Corvette is ostensibly “America’s sports car”. And it’s already nose heavy enough as it is, much less now that they put a battery up there. Now, maybe since it’s a hobby car, they just have a dinky little 50 mile battery up there?Quote:
Originally Posted by John S
But Who really knows? Because these puff pieces never seem to offer up any tech details. Or maybe they just know their audience and their eyes glaze over (or worse) when presented with the science?
BTW, if you want to learn good stuff about BEVs, the Engineering Explained, youtube channel brings the tech. Big time. He does the math balance for electric cars, (which is tolerable as long as you don’t mind great weight), Battery trucks, etc… And before you (falsely) accuse me of being against battery cars, the guy behind Engineering Explained, has a Tesla and loves it. It’s just that he doesn’t talk fluff and puff. He talks straight. Good with the bad.
-Peter
A helium filled (or steam) mylar pontoon boat may help the physics issue a bit.
Always something new ...
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</header>"Our device shows excellent scalability at a low fabrication cost, says Tan Swee Ching. "Compared to other MEG structures and devices, our invention is simpler and easier for scaling-up integrations and connections." (Credit: Jacob Joaquin/Flickr)
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NATIONAL UNIVERSITY OF SINGAPORE
Researchers have created a self-charging, ultra-thin device that generates electricity from air moisture.
Imagine being able to generate electricity by harnessing moisture in the air around you with just everyday items like sea salt and a piece of fabric, or even powering everyday electronics with a non-toxic battery that is as thin as paper.
Researchers developed the new moisture-driven electricity generation (MEG) device made of a thin layer of fabric—about 0.3 millimeters (about 0.0118 inches) in thickness—sea salt, carbon ink, and a special water-absorbing gel.
The concept of MEG devices is built upon the ability of different materials to generate electricity from the interaction with moisture in the air. This area has been receiving growing interest due to its potential for a wide range of real-world applications, including self-powered devices such as wearable electronics like health monitors, electronic skin sensors, and information storage devices.
Key challenges of current MEG technologies include water saturation of the device when exposed to ambient humidity and unsatisfactory electrical performance. Thus, the electricity generated by conventional MEG devices is insufficient to power electrical devices and is also not sustainable.
To overcome these challenges, a research team led by Tan Swee Ching, assistant professor from the materials science and engineering department at the National University of Singapore’s College of Design and Engineering (CDE), devised a new MEG device containing two regions of different properties to perpetually maintain a difference in water content across the regions to generate electricity and allow for electrical output for hundreds of hours.
A paper on the work appears in the journal Advanced Materials.
The new moisture-driven electricity generation device capitalizes on the difference in moisture content of the wet and dry regions of the carbon-coated fabric to create an electric current. Sea salt is used as a moisture absorbent for the wet region.
The researchers’ MEG device consists of a thin layer of fabric which was coated with carbon nanoparticles. In their study, the team used a commercially available fabric made of wood pulp and polyester.
One region of the fabric is coated with a hygroscopic ionic hydrogel, and this region is known as the wet region. Made using sea salt, the special water-absorbing gel can absorb more than six times its original weight, and it is used to harvest moisture from the air.
“Sea salt was chosen as the water-absorbing compound due to its non-toxic properties and its potential to provide a sustainable option for desalination plants to dispose of the generated sea salt and brine,” says Tan.
The other end of the fabric is the dry region which does not contain a hygroscopic ionic hydrogel layer. This is to ensure that this region is kept dry and water is confined to the wet region.
Once the MEG device is assembled, electricity is generated when the ions of sea salt are separated as water is absorbed in the wet region. Free ions with a positive charge (cations) are absorbed by the carbon nanoparticles which are negatively charged. This causes changes to the surface of the fabric, generating an electric field across it. These changes to the surface also give the fabric the ability to store electricity for use later.
Using a unique design of wet-dry regions, the researchers were able to maintain high water content in the wet region and low water content in the dry region. This will sustain electrical output even when the wet region is saturated with water. After being left in an open humid environment for 30 days, water was still maintained in the wet region demonstrating the effectiveness of the device in sustaining electrical output.
“With this unique asymmetric structure, the electric performance of our MEG device is significantly improved in comparison with prior MEG technologies, thus making it possible to power many common electronic devices, such as health monitors and wearable electronics,” explains Tan.
The team’s MEG device also demonstrated high flexibility and was able to withstand stress from twisting, rolling, and bending. Interestingly, to show its outstanding flexibility, the researchers folded the fabric into an origami crane which did not affect the overall electrical performance of the device.
The MEG device has immediate applications due to its ease of scalability and commercially available raw materials. One of the most immediate applications is for use as a portable power source for mobile powering electronics directly by ambient humidity.
“After water absorption, one piece of power-generating fabric that is 1.5 by 2 centimeters in size can provide up to 0.7 volts (V) of electricity for over 150 hours under a constant environment,” says research team member Zhang Yaoxin.
The researchers have also successfully demonstrated the scalability of the new device in generating electricity for different applications. The team connected three pieces of the power-generating fabric together and placed them into a 3D printed case that was the size of a standard AA battery. The voltage of the assembled device was tested to reach as high as 1.96V—higher than a commercial AA battery of about 1.5V—which is enough to power small electronic devices such as an alarm clock.
The scalability of the invention, the convenience of obtaining commercially available raw materials as well as the low fabrication cost of about 0.15 Singapore dollars (0.11 USD) per meter square make the MEG device suitable for mass production.
“Our device shows excellent scalability at a low fabrication cost. Compared to other MEG structures and devices, our invention is simpler and easier for scaling-up integrations and connections. We believe it holds vast promise for commercialization,” says Tan.
The researchers have filed a patent for the technology and are planning to explore potential commercialization strategies for real-world applications.
Source: National University of Singapore
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#Spam
most estimates are saying 30% bigger carbon footprint to build an EV.Quote:
Originally Posted by John S
What does the scrapping footprint look like?
Save a city, kill the world?
EV with some other storage device than a battery full if mined elements is probably the future?
it,s beginning to look like RAW materials are going to put the BEV car on the back bench
Mr musk is beginning to get the picture that in order to build his tesla,s he needs China and Russia
This is also the case or hopefully less with fuel cells
Suddenly he is afraid of world war 3? and there are problems with starlink!
They made an effort to build the F150 battery with mainly nickel
So expect not only to see price rises due to inflation but also materials going up
so for the very close future combustion engines are likely to stick around some more
After being flooded by the hurricane the ev’s are going up in flames here in fla. Guess they don’t like being in water even if it just barely touched the battery pack. Real world problem for all battery powered vehicles that owners have to deal with.