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Comment Re:been there, done that (Score 1) 123

That's not when AC took off. Look a couple decades later.

And doubling gets progressively harder as grids grow. Your example was 1/3 of what's needed.

A more recent doubling is 1975 to 2000, which took 25 years. It's 1,800TWh, which will also allow for partial electrification fo the economy.

https://ancillary-proxy.atarimworker.io?url=https%3A%2F%2Fwww.eia.gov%2Fenergyexpl...

PS. NREL thinks we'll effectively need to double generation (another 4,000TWh) for "high" electrification of the economy (including transport).

Comment Re:Cost, not chargers (Score 2) 162

"Of course there are used electric vehicles, but they are still on the upper price end."

'22 Kia Niro EV for $8k net of tax credits is nowhere near "the upper price end".

"Those that aren't have small aging batteries with very limited range."

260+ mile range and a battery showing no sign of degradation.

And free DCFC near me, too.

Good deals on decent used EVs abound.

Comment Re:RAt and most likely APU as well (Score 1) 108

"Alternatively, on refuelling, tankers could have been used which had a small amount of a different type of fuel (gasolene or kerosene) - which could have dissolved in jet fuel, and would have burned but producing significantly less power."

Where have you ever seen fuel trucks switch fuels?

Aside from that, the B787 carries 33,000 gallons of fuel. That's four X 8,000 gallon fuel trucks, full. At 200gpm, quite a length fueling process.

Aviation gasoline is typically dispensed overwing at dramatically lower rates (15gpm or so) from small trucks.

The situation you propose simply doesn't arise in real life.

Comment Re:Another video going around... (Score 1) 108

"And as others here have mentioned, the weights of passengers, crew, and carry ons, are all calculated using an average weight. Which can commonly lead to the plane being "Slightly over-fueled" and will cause it to get to the destination with a good bit more fuel than its supposed to be landing with. Leading to a dump. "

Yet again you look like you're just making shit up.

There's no need to dump fuel at the end of a flight for weight issues.

And no airline would load more fuel than they need for that flight.

Comment Re:This is terrible policy (Score 1) 158

"I could be swayed by an argument that says forcing builders to get closer to passivhaus efficiencies is better than this. But that would be dramatically more expensive, so the pushback would be much greater."

Yet it's not. And the payoff is longer lasting.

2X6 walls allowing greater insulation, high efficiency lighting, heat pumps, ...

Incremental costs are quite low.

Comment Lost in the discussion is how much RE is needed. (Score 1) 59

1.8 gigatonnes of global annual steel production, essentially 100% iron.

Iron reduction with green hydrogen then needs needs 70MT H2.

Which needs about 4,000TWh of electrical energy.

Or the entire US grid's annual use.

If anyone asked what will we do with the excess RE we need for a fossil free life (with minimal storage), this is part of it.

Another 25MT of green H2 to make green ammonia.

The list of interruptible electrifiable processes goes on, including water deslinization, hydrogen for long term energy storage, carbon capture, methanol and more ammonia for energy use, ...

Related savings include 30% of ore shipping. Which for Australia's exports (half of global production) means 1,650 fewer carrier (170,000 tonne deadweight, ie really big) loads.

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