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Sinequa Nan's avatar

Super-interesting as usual. Thank you!

But: no garden pictures? They're always a welcome reminder to nurture and appreciate the local.

Relatedly, tomorrow evening:

"RFK Jr., to Host Virtual Roundtable on Revitalizing Our Food, Farms, and Soil: The Farmers Speak Aug. 3 at 8 p.m. ET"

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Beth's avatar

Very interesting download as usual Doc. Thank you!

On the energy news...

I have a (redneck engineering) friend who is very talented, educated, etc, and he patiently helps me to understand the finer technicalities of energy, and reasons why it is such a big deal. Past, present, and future.

I saw the LK99 news yesterday and immediately asked his opinion with some questions. ⬇️

“I agree, it does sound too good to be true, and a bit fishy around the edges.

What would the impact be on energy / oil if this were to be true, and could be manufactured cheaply ?

I would assume it would change things quite a lot, since loss from transmission is a huge deal right now. If that loss could be converted into excess available electrical energy, we’d need less power plants, less power lines, less transformers etc. Should also make for more efficient

TVs, charging, batteries etc.

The effect would be HUGE.

MagLev trains for starters.

8% reduced transmission costs. Vastly cheaper MRI machines (currently operating with liquid helium).

MAJOR reductions in the need for copper.

Back in mid 90s I picked up a BS in physics. My senior thesis was on high temperature superconductors which I thought showed promise. Almost 30 years later I think it’s still at that point. I haven’t followed the tech development closely but if there had been major game changing breakthroughs it’d be out in the news.

I haven’t dived into details on this latest news. It looks suspicious. Like a number of cases, I expect soon to see criticism as attempts to repeat the findings fail.

In a nutshell superconductors drop resistance to zero. Normal resistance in wires is a huge cost, as electrons moving through the wire bounce around, each time leaving behind energy as heat. That resistance heating BTW is the main loss mechanism in transporting electricity around the grid. Which means if we get HTSCs working at scale and at low cost then the grid would be far more efficient.

SCs work by electrons being “paired” together. Normally electrons repel each other. But in SCs the pair interact with the lattice.

My quantum prof called it a “speedboat” model: picture two speedboats on a lake going in the same circle. The wake of the first boat sets up a slight “groove” in the water for the second boat, and it’s wake does the same for the first boat. This creates a slight preferred path for the boats with reduced resistance.

Same with the electrons. The first creates a wake in the lattice. But for the wake to stay in place long enough the lattice has to be still.

And THAT is why the wire has to be cold.

Thermal motion in the lattice at room temp would destroy the wake and the second electron would see no net attraction to the first.

So… based on that I’m very skeptical that somehow (a) another mechanism for SCs was discovered or (b) another lattice was found which preserves the wake at room temp.

Of course if it turns out either was done… awesome news!

For industrial uses, we would still have years of development to go - to push down cost, ramp up production, and build up infrastructure using these and to manufacture at scale.

It’s the chasm between the first integrated circuit and Intel or Texas Instruments bringing millions of chips to market.”

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