[ExI] not that rare earth (part 2 of at least 2)

[spike at rainier66.com]

-----Original Message-----
From: extropy-chat <extropy-chat-bounces at lists.extropy.org> On Behalf Of Ben
Zaiboc via extropy-chat
Subject: Re: [ExI] not that rare earth (part 2 of at least 2)

On 01/11/2025 13:32, spike wrote:
>>... Regarding my post on fire-resistant power storage, I am surprised no
one checked my estimates.




>...I'm surprised no-one has mentioned flywheel storage. Inherently
fire-resistant (there's nothing to catch fire), can store large amounts of
energy, can be buried in the ground, and things built on top of them if
desired, very long lifetime, very good reliability, easy to build, very fast
charging and discharging times. The only downside I can see is the need (or
at least desirability) for rare-earths for the magnetic bearings. Which
might not actually be a need, if spike is right.

--
Ben


_______________________________________________




Ben the calculations on this are easy enough, or estimates.

Alternative: see if plausible proposals have been made.  Compare costs.

My intuition tells me that notion won't compete with lithium batteries
because of the huge advantage of mass production already in place for the
batteries.

Aside: the battery storage notion has another fun advantage: it can use old
batteries from retired EVs.  The batteries can still store power after they
are too degraded for automotive use.  Those should be cheap.

spike