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Inside: An end to the climate emergency is in our grasp; and more!

Archived at: https://pluralistic.net/2024/06/12/s-curve/

#Pluralistic

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A windfarm at sunset. In the foreground at the bottom are the silhouettes of a Victorian crowd of spectators watching the turbines. On the left of the image is a carmine-skinned Satanic figure dressed in business casual, jerking his thumb at an oilwell that is gushing crude all over the scene.
#Pluralistic
Cory Doctorow
On June 20th, I'll be in Oakland, CA to keynote the @Locusmag Awards:

https://locusmag.com/2024-locus-awards-weekend/

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2024 Locus Awards Weekend, June 19-22

We can’t wait to see you at the Locus Awards Weekend, to be held June 19-22, 2024 in Oakland, California! WEDNESDAY – FRIDAY: We’ll kick off the event with a series of online read…
Locus Online
@Locus Magazine
Cory Doctorow

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Cory Doctorow

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Cory Doctorow

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#10yrsago #15yrsago #20yrsago
Cory Doctorow

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#10yrsago #5yrsago
Cory Doctorow

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#5yrsago
Cory Doctorow

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#1yrago #5yrsago
Cory Doctorow

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Cory Doctorow

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Cory Doctorow

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Cory Doctorow

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@Locus Magazine
Cory Doctorow

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Cory Doctorow

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Cory Doctorow

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@Locus Magazine
johnaldis

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liaml
"The net energy efficiency of fossil fuels is about 37%."

What's worse is that this is almost the *optimal case* for fossil fuels. Consumer internal combustion engine vehicles for example only convert 15-30% of available energy in the fuel into power at the wheels - that's after the initial 33% loss to convert+transport. Meanwhile EVs hit 75%+

https://www.fueleconomy.gov/feg/evtech.shtml

All-Electric Vehicles

All-electric vehicles (EVs) are efficient, produce no tailpipe emissions, and help increase energy security. See if an EV is right for you!
www.fueleconomy.gov

Cory Doctorowudostępnił to.

dragonfrog
@liaml
If I understand that right
ICEVs are about 15-30% efficient in turning the energy in the fuel into motion. Multiplied by the ~67% efficiency of fossil fuel production chain, their overall efficiency is about 10-20%.

EVs are about 77% efficient in turning energy from the power grid into motion. Multiplied by the US power grid's ~40% efficiency (1) in getting energy from fuels to grid consumers, their overall efficiency is about 31%.

(1) https://www.eia.gov/todayinenergy/detail.php?id=44436

More than 60% of energy used for electricity generation is lost in conversion - U.S. Energy Information Administration (EIA)

Energy Information Administration - EIA - Official Energy Statistics from the U.S. Government
www.eia.gov
@liaml
Cory Doctorow
Assumed grid charging. My L2 charger is powered by my rooftop solar.

ETA: it doesn't even go through an inverter! DC generation -> DC output -> DC socket on my car.
Ten wpis został zedytowany (9 miesiące temu)
dragonfrog
@liaml

I guess grid-connected solar generation has the same sort of "what is efficiency anyway" question as off-grid solar. I think a useful way to look at is as, how many times the embodied energy of manufacturing does a solar system generate over its lifetime?

I understand modern panels take about 2 years to generate their embodied energy, and typically last about 20 years - so about 1000% lifetime energy efficiency.

So for an EV charged by solar, that's ~770% efficiency.
@liaml
bluGill
@tomjennings@tldr.nettime.org

@pluralistic@mamot.fr @liaml@umbracocommunity.social closer to 45% than 30%. You are correct that engines get close to that today.
Aaron Sawdey, Ph.D.
@tomjennings @bluGill @liaml And then you have weird stuff like the F1 engines that are essentially turbo-compound because they extract additional energy from the exhaust with an oversized turbine wheel that is captured electrically. Too complex for the consumer market. Can I please just have a $25k EV Civic with reasonable range? 100-150 hp should be plenty, no need for “silly mode”.
@tom jennings @liaml @bluGill
Trey Roady
@tomjennings @acsawdey @bluGill @liaml Everytime I hear concerns over EV range, it quickly becomes a question of "How many times do you actually drive that far?".

How much of it could be easily solved with easy IC/hybrid rental? So many times people act like they're completely helpless to organize a car rental.
@tom jennings @Aaron Sawdey, Ph.D. @liaml @bluGill
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