Posted on 06/23/2021 7:32:27 AM PDT by DUMBGRUNT
The flywheel has a diameter of one meter and weighs three tons, and can be placed in the garden of a private house.
The proposed solution consists of a hollow, solid cylinder that is rotated around an axis and connected to an electric motor and generator. “When you have the energy to store, the engine drives the flywheel, which accelerates,” said the company's co-founder and general director, André Gennesseaux. “In the other direction, the motor can act as a brake to discharge the electricity.”
Currently, Energiestro offers a standard storage solution with a nominal power of around 10 kW, which corresponds to a charge and discharge cycle in one hour.
According to him, in hot and humid regions, flywheels are much more robust and reliable than lithium-ion batteries.
(Excerpt) Read more at pv-magazine.com ...
That’s 2 dimensional..................
Question: If someone had such a flywheel, could it quickly transfer a full charge to an electric car?
The added mass of the flywheel would, of course, make the entire vehicle that much heavier. It’s been tried on city busses, but that’s a much larger vehicle. The flywheel has to be pretty friction-less. Jouncing around on a typical roadway might not be something that you’d want to do.
If half of them are spun one way and the other half the other, the problem goes away.
It’s solid except where it isn’t. Hope that helps!
“I’m never really clear on what governs how fast electricity can be transferred from “this” to “that”.”
Electricity always MOVES at the speed of light, more or less. But batteries have a characteristic “charge acceptance rate”. The more charge pumped into a battery, the more it heats up. Different batt types have diff charge acceptance rates. At some point, the heat produced will cause a failure; either by evaporating the electrolyte in a conventional lead-acid battery, or, by warping the plates such that they touch each other and create an internal short circuit. Whatever happens to Li-ion batts being XFC’ed (extreme fast charged) is an area I can’t comment on. But every type will have SOME limitations.
There are plenty of articles regarding “charge acceptance rate” should you wish to search.
Can’t get something for nothing.
“ break even.
“ get out of the game.
Send me an Autocad file with 3D rotation..................
That’s exactly why they have huge containment systems are often put underground.
In the mid 1990s, my R&D team worked on a flywheel energy storage project to power electric lights at major intersections. It would keep the lights on during power failures. The flywheel was buried near the highway intersection. We built some prototypes, but I left the company and don’t know what happened to the tech.
Yup, there is no free ride and no free energy. It’s always going to take more input to get and keep the flywheel spinning than the energy you get back out of it.
From the Gyrobus link...
Charging a flywheel took between 30 seconds and 3 minutes; in an effort to reduce the charge time, the supply voltage was increased from 380 volts to 500 voltsGiven the relatively restricted range between charges, it is likely that several charging stops would have been required on longer routes, or in dense urban traffic. It is not clear whether vehicles that require such frequent delays would have been practical and/or suitable for modern-day service applications.
—”a hollow, solid cylinder?..”
Guessing, solid would be less work to manufacture and balance?
The Princeton Plasma Physics Lab used flywheel storage to power the massive draw needed by the fusion test reactors. The flywheels were in a vast hall, each in it’s own vacuum housing. I asked how far one would go if it broke free. The answer I got was “Philadelphia.”
Draw me up a Autocad file......................
If you have a 10 kWh flywheel and were only watching the TV at night (1 kWh per hour) you could go 10 hours depends on the rate of power consumption.
The system capacity should be increased, initially, to 20 kWh, and then 50 kWh, to eventually reach 24 hours of storage. “The size limit will be given by logistics as we have to find cranes capable of burying the flywheels in the ground, which is why we are limiting ourselves to 50 kWh in our current business plan,
—” Makes for quite a show when they fail”
Notice the underground containment shown at the link.
We’ve got the power...I would have thought that quick transfer of the energy would cause massive heating and breakdown of the battery.
Whatever happened to zinc air batteries?
From the article it appears that the fly wheel versus batteries issue is due to intended use as leveling out the variable reliability of solar power or wind power.
You can't even quit the game
https://youtu.be/hFdsRe8tPO0?t=101
—”Princeton Plasma Physics Lab used flywheel storage to power the massive draw needed”
Looking around, I found this...
Up and away: The two 700-ton flywheels that power the NSTX-U could put a naval ship into orbit.
https://www.pppl.gov/node/3485
A hollow solid cylinder. One of these things is not like the other
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