There's a project here in Australia that reckons its profitable to build a solar farm in Australia and ship the electricity over 5,000km to Singapore.
https://www.suncable.energy/our-projects
Maybe that's all just marketing hype and greenwashing corporate bullshit, but it at least _seems_ feasible to transport solar (and battery stored for 24x7) power long distances.
The only issue is that, like the Sahara, but unlike the Arabian peninsula and the American Southwest, Australia is not closely located to any other major consumers of power, so will need to build that kind of infrastructure.
To be honest I'm quite excited. I think the transition to solar is happening faster and at an accelerating rate, ahead of anything we dreamed of even a decade ago.
Not that I'm an expert of anything but Australia has a lot of mining of resources that I would think could use a lot of electricity? Like instead of sending iron ore to mainland China, why not make steel in Australia if electricity is cheap?
Hmmm now I'm curious - google google google.
Refining bauxite into aluminium increases the price about 12 times from $40/ton for bauxite to about $2,700 per tone for aluminium which requires 5 tons of bauxite as an input.
Australia exports about 40,000kt of bauxite a year. It requires about 15 kWh/kg to refine aluminium from bauxite.
So if we refined all that bauxite into aluminium before exporting it, we'd use about 600GWh of electricity to turn $1.6 billion worth of bauxite into $220 billion worth of aluminium. (And the economics is better than that, because there's only be 8 million tons or stuff to export instead of 40 million tons.)
Surely that extra 218 billion a year would be way better (for Australia) staying in our economy instead of having all that bauxite refined somewhere else?
On the other hand...
Sun Cable reckons it'll deliver 1.7GW to Singapore 24x7, or 15,000GWh. So refining _all_ the bauxite would only use 4% of that.
Australia generates about 280TWh of electricity over a year. So refining _all_ the bauxite would use only 0.2% of that.
So no. It sure as hell doesn't use "a lot of power", even if people do refer to aluminium as "solid electricity"...
That was a fun rabbit hole.
(Disclaimer: no effort made to verify numbers some of which were sourced directly from DuckDuckGo search response page snippets. Also, I'm notorious for dropping three orders of magnitude when doing mental math using kilo/mega/giga/tera prefixes.)
It's the thing where the use of electricity is a large part of the production of aluminum, but the production of aluminum is not a large part of the use of electricity.
I’d expect HVDC to deal with power loss well enough. The longest one in China is 3200 km at 1100kv and 12 Gw capacity.
My guess is that the HVDC lines they have isn’t really enough to move all that renewable energy yet, or the strategy might be to build more industry out west closer to solar and wind, although water is then the limited resource.