[Qwertious]

>Coal is cheap

No it's not. I'm not talking about the environment either, coal plants are just straight-up more expensive than gas plants and renewables.

Coal plants are necessarily steam turbines and not internal combustion, because coal is filthy and the mercury/sulfur/etc would wreck the guts of any machinery it goes through. Thus, it's only used to boil water.

Gas turbines don't have that problem, so they spin the turbine with the combustion products directly. They're far more efficient, the machines are smaller and cheaper, and because you don't need to wait for a giant kettle to boil before ramping up the power, they're far more flexible and responsive to demand. It also helps that the gas is fed with a gas pipe, whereas coal needs to be fed with a bobcat.

Which is why nobody is building new coal plants - they're way more expensive than gas plants, even if the gas fuel itself is more expensive than coal.

[hihitsdumb]

Nobody is building new coal plants...

...except China, who is building coal plants at a pace never seen in history. Are they dumb, or...?

[Qwertious]

Chinese state govt is building them in response to poorly thought out federal govt incentives. That plus backup plans (since China had plenty of coal but needs to import gas, so it could easily be navally blockaded by the US). Also gas turbines are a specialty of the West (which again doesn't work well geopolitically), and their demand has massively outstripped supply (we're even seeing jet engines being converted into gas turbines) and the order backlog is years out - all of which doesn't jive with China's "build everything right f'n now" strategy.

China is building everything at a pace never before seen in history. Partly because their construction industry is a jobs program, and their economy is so dependent on it that they prefer building things at a loss rather than not building at all. Which is financially dumb, but welcome to politics.

[ting0]

Or perhaps they aren't drowning in propaganda (that they themselves promote in the West), and are happily reaping the rewards of cheap coal and energy production.

By the way, the round trip of: Sell and export your coal to manufacturers that burn that coal to produce electronic goods that produce energy, then buy that energy technology to power your own infrastructure, is certainly not cheaper than just burning the coal you mined yourself for your energy production.

Cheaper (ergo, more profitable) for the mining companies, yes. That's about it though.

[tpm]

They are replacing old dirty plants. Actual coal burned is not rising anymore.

[hihitsdumb]

So they are building new coal plants.

[pcchristie]

Building coal plants doesn't impact emissions (materially, anyway). It's the using them to burn coal part that causes emissions (and generates electricity).

[avianlyric]

Yes, many of which are expected to never actually be used. Accidental result of how China does its provence based infra funding.

Right now China is building out more solar and wind per year than than the entire total deployed solar and wind in the entire UK, and they’re only getting fast. Their ability build renewables now vastly outstrips their historical coal buildout and their rising energy demands. They’re well on their way to achieving net zero far faster than anyone thought was possible.