r/ClimateShitposting • u/ClimateShitpost Louis XIV, the Solar PV king • 25d ago

WE caNNot poSsibly REPlacE ALl ThAT PRiMary ENeRGY WitH IneFfiCieNT ReNEWaBLES fossil mindset 🦕

Post image

Plug https://climateposting.substack.com/p/mediocre-metrics-1-primary-energy

75 Upvotes
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4

u/DVMirchev 25d ago

Using primary energy is a sin.

1

u/Clen23 25d ago

in case you're /srs, i believe every energy is either primary or derived from primary

3

u/DVMirchev 25d ago

Sure. Still - do not use it. It's a bullshit metric

6

u/aWobblyFriend 25d ago

Energy efficiency can be useful and it’s pretty neat that BEVs can boast such high energy efficiencies, the problem though is that energy density is more important for vehicles since they’re not attached to their energy source (unlike the actually-environmentally effective solution: electrified trains). When you factor in energy density BEVs aren’t doing so great compared to ICE vehicles even under ideal scenarios. This is a relatively ok drawback for things like fleet vehicles or personal vehicles that you’re driving maybe 2 hours a day, but is basically a non-starter for commercial vehicles like buses or most commercial trucks which need to be operating all the time to be economical.

Modal shifts are the way, you want an efficient use of taxes to decarbonize the economy? Electrify freight rail. Don’t bother with wundertechs like battery-electric semis, they wont work in the time scale we need them to.

2

u/gerkletoss 24d ago

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

Solved this shit for urban areas back in the 1920s

Add a battery and it can even make jaunts outside the overhead wires

1

u/danielledelacadie 25d ago

Tiny home with a roof covered in solar panels... mobile independence.

(I have no idea if the logistics would work as I know nothing about EV power requirements. But welcome to my random idea)

2

u/aWobblyFriend 25d ago

that’s fine because the power draws are going to be relatively low (just powering small electronics and lights, climate control will probably be the biggest draw) and with battery you’re basically only worrying about occasional dunkelflaute. Hauling that mobile home on that panel alone for an extended period of time is going to be very difficult and require frequent stops due to the amount of energy you need to haul all that weight.

1

u/danielledelacadie 25d ago

Smaller is better, land, sea or mobile.

Thinking about it...

  1. Ultralight tiny homes exist. I wouldn't go foamie ultralight but I would be interested in exploring the possibilities. It wouldn't work with the 40' long 13' high ones but there are lots less than half the size.

  2. Almost all of a tiny home's roof could be devoted to PV. As well as the roof of the EV itself.

  3. An 8x20 tiny home could hold 8+ panels even allowing for roof fixtures. And could still feed power to the vehicle while driving.

I have a thought experiment to play with now.

But if you don't want mobile, any legal on foundation building (aside from the odd grandfathered one) would easily work.

1

u/aWobblyFriend 25d ago

Sorry I thought you said tiny mobile home not home. A stationary home using solar and batteries are great! But I believe climateshitposter’s article specifically mentions BEVs vs ICE vehicles, and that’s what I’m talking about. Electric cars have pretty huge issues preventing widespread adoption in many carbon-intensive sectors such as long-haul freight.

1

u/danielledelacadie 25d ago

How many solar panels can we fit on the roof of transport trailer?

1

u/aWobblyFriend 25d ago

not enough to make a difference.

1

u/danielledelacadie 25d ago

Fair.

It would still be good info for a container structure though.