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Comment by scarmig | Hacker News Reader

326K (+127 deg F) and 340K (+152 deg F) for their less and more pure samples respectively. And, yes, if it's a superconductor as we understand them, that's the temperature at which it would have zero resistance as well.

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53°C and 67°C.

Wow.

Soon to be average temperatures, what luck!

Nonsense.

It's obviously a hyperbole. But if we once were to use these SCs to transport energy from solar farms in Sahara, it might have to operate in that temperature range.

Five meters down in the desert you're under 25 degrees year round. It's the average that matters for soil temps, not the peaks. You can approximate this by taking the average air temperature and defining the surface as the top five meters. Below the 10 meter mark the day/night cycle influence is pretty much negligible (but that would be more costly).

For instance:

https://www.researchgate.net/figure/Temperature-variation-of...

Earth's average temperature right now is ~17° Celsius.

So...no.

Have you included the insides?

By comparison the hottest verified recorded air temperature in the world is 54°C

> if the current record were to be decertified then the holder would be a tie at 54.0 °C (129.2 °F), recorded both at Furnace Creek and in Kuwait.

https://en.wikipedia.org/wiki/Highest_temperature_recorded_o...

Open air. These days the interior of my car regularly exceeds 54 even with the windows cracked and a winshield shade up.

So that’s within the range of off the shelf cooling equipment to maintain superconductivity.

Any speculation if that’s consumer, commercial, or industrial off-the-shelf?

Sounds like we may be talking running an MRI off of a mini split system.

LK99 isn't necessarily a stand-in for helium cooled superconductors - if all SC were equivalent to any other, YBCO and similar would have been enough to make MRIs significantly cheaper - LN2 is easy and cheap to produce.

Thanks, we really needed burger units here

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