6/ Another result: in the optimum, BEVs and catenary BEVs favor solar photovoltaic energy, while hydrogen and e-fuels also require substantial wind power investments, and also increase fossil electricity generation. ERS = electric road system (catenary) FCEV = fuel cell electric vehicle PtL = efuels - ThreadSky

wpschill.bsky.social • 286 days ago

6/ Another result: in the optimum, BEVs and catenary BEVs favor solar photovoltaic energy, while hydrogen and e-fuels also require substantial wind power investments, and also increase fossil electricity generation.
ERS = electric road system (catenary)
FCEV = fuel cell electric vehicle
PtL = efuels

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wpschill.bsky.social•286 days ago

7/ Results remain qualitatively robust in numerous sensitivity analyses where we investigate the effects of the 🇪🇺 interconnection, constrained wind power expansion, or alternative assumptions on charging availability. If you like, check out the Supplemental Information 🤓

wpschill.bsky.social•286 days ago

8/ We conclude: from a power sector perspective, direct electrification of trucks and flexible charging is clearly preferable. Or as we write in the title: "Go electric, and charge smartly!"

Want to read more? #openaccess article in Cell Reports Sustainability, full text 🔽

wpschill.bsky.social•286 days ago

9/ I want to conclude with a big shout out to my fantastic co-authors Carlos Gaete @diw.de and Julius Jöhrens & Florian Heining @ifeu.bsky.social 👋 Well done, team!

And we gratefully acknowledge research grants by @bmuv.de and @bmwk.de

And finally, a 🇩🇪 policy summary: https://www.diw.de/de/diw_01.c.905786.de/publikationen/diw_aktuell/2024_0094/klimaschutz_im_gueterverkehr__batterieelektrische_antriebe_k___r_mit_erneuerbarem_strom_versorgt_werden_als_wasserstoff-lkw.html

sebastianpieper.bsky.social•286 days ago

Surprised by BEVs favoring PV - does this not mean a lot more seasonal storage requirements (as opposed to wind) to keep the trucks going in winter?

wpschill.bsky.social•286 days ago

Thanks, Sebastian! No, long-duration storage needs hardly increase, or even decrease for flexible BEV (Fig. S.6). This is different for "inflexible", on-site hydrogen generation at filling stations. though. But to be fair: the European interconnection also helps a bit with integrating additional PV.

amie42.bsky.social•285 days ago

Short and mid distance trucks are usually operated during business hours which correlates to the times of lowest electricity prices due to high solar production. How would you tackle this timing issue? Swappable batteries?

wpschill.bsky.social•285 days ago

Thanks! Here we looked at heavy-duty vehicles >26, for which swappable batteries may in fact become a thing. We are looking at this in follow-up research :) For smaller trucks, battery swap seems implausible, as battery restrictions don't play much of a role there.

wpschill.bsky.social•285 days ago

We were also surprised how much PV could actually be absorbed by HDV directly. But even if trucks are on the road (and not under an overhead line) during PV peak hours, they could also make indirect use of PV via other flexibility options in the power sector like stationary storage, of course.

amie42.bsky.social•285 days ago

I think Battery Tenders might become a thing. An extra module attached to the Trailer to be charged while the trailer is being handled at the logistic center. The size and SOC of that module could be optimized to the destination of that trailer.

wpschill.bsky.social•285 days ago

I also find battery swapping interesting, but it involves a lot of standardization and coordination. In China, it already is a real thing, compare here: https://www.cell.com/joule/fulltext/S2542-4351(24)00192-2 Not sure how practical "tenders" would be, and if they would require less coordination; is there literature on this?

amie42.bsky.social•285 days ago

I have no idea whether I read about it or it's just a brain fart of myself. But you can surely spin this idea even further by equipping the trailer with its own motor/generator and reducing the interface to measure the pull forces at the kingpin like a Pedelec bicycle.

wpschill.bsky.social•285 days ago

There are R&D projects for e-trailers in Germany at the moment, but afaik it's not really a silver bullet https://www.linkedin.com/posts/elektro-mobil_schwerlastfr%C3%BChst%C3%BCck-activity-7201583110944104448-Evaj?utm_source=share&utm_medium=member_desktop

amie42.bsky.social•285 days ago

But that would be hard to implement according to current German law

fanfsl.bsky.social•286 days ago

(Deleted the faulty first post.)

The FCEV's and PtL's requirements for wind power and fossil electricity, is it just because of its inefficiency?

wpschill.bsky.social•286 days ago

Thanks! Yes, these options require a lot of additional electricity, which is largely provided by wind power, some PV, and some additional electricity from gas power plants in the optimum. Accordingly, the renewable share also decreases in these cases (we set a minimum of 80%)

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