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AukeHoekstra Profile picture
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19 Oct, 4 tweets, 2 min read
New lithium ion battery longevity is amazing:
up to 3.5 MILLION km!

And this will lead to vehicle to grid!

Not just my opinion but that of battery prof. Jeff Dahn expressed in a recent (Sept 20th 2020) presentation.

Short thread

ht @Joost57437492
You might already have heard about their paper showing charts like these that indicate well designed batteries could last up to ten times more km than the car.
When charging and discharging is partial the battery lasts even longer.

I've been saying for a long time that V2G is a good idea but only when it doesn't shorten the lifetime of the car. It seems clear that well constructed batteries are better than this criterion by 10x!
And here the world's most famous battery professor that works closely with companies like Tesla underscores this simple fact: with awesome batteries that last this long, V2G becomes a no-brainer.

Also: give batteries a second life before recycling them.
/end

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More from @AukeHoekstra

AukeHoekstra Profile picture
20 Oct
Nieuw rapport: kosten stimulering elektrische auto's VEEL te hoog ingeschat door Algemene @Rekenkamer

Naarmate je realistischer en minder kortzichtig wordt zit de Rekenkamer 3x, 10x of 50x (!) te hoog.

Ik vat mijn oordeel even samen in een draadje.
rijksoverheid.nl/documenten/rap… Image
Ik maak deze berekening al jaren op een vergelijkbare manier en schreef laatst een vernietigend opiniestuk in @Energeia_Nieuws.

Hoop dat jullie nu eindelijk luisteren @Rekenkamer: effectief klimaatbeleid ontmoedigen met onzin-berekeningen is NIET OK!
energeia.nl/energeia-artik… Image
Ik weet dat "onrealistische assumpties" diplomatieker klinkt. Maar het zijn volgens mij gewoon grove fouten. Jaar op jaar. Gekmakend!

Wat me ook irriteert is dat @PieterOmtzigt die fouten overneemt. Want op andere gebieden is hij voor mij een held:
Read 13 tweets
AukeHoekstra Profile picture
17 Oct
Do I see future for PHEVs? Not really because adding the combustion drivetrain with its costs, maintenance and fuel use loses as battery prices go down.

But there's this too: they use massively more fuel than tests assume.
theicct.org/publications/p… Image
In practice this means 2-4 times more fuel pipe emissions of CO2 and NOx than currently assumed. And switching to WLTP doesn't really help either (and the ICCT agrees with me).

So if tests would be based on reality instead of the laboratory, this would be really bad for PHEVs.
And there's good news on the testing front. It seems the EU might be moving to reality based testing. Also the is more and more on road testing by institutes like @TheICCT informing policy.
theicct.org/publications/t… (ht @YoannBeber) Image
Read 5 tweets
AukeHoekstra Profile picture
17 Oct
What distinquishes evidence based systems like science from conspiracy theories like QAnon and fakenews?

Now is a good time to explain it again because QAnon's #SaveTheChildren is hurting innocent children and helping Trump to make more victims.
fivethirtyeight.com/features/qanon…
QAnon is extreme but not so fringe anymore, now that we have Republican senators and Trump gamely embracing it.

You and I might "know" that it's a load of crap, but how can we explain the difference between QAnon and evidence based science?
washingtonpost.com/technology/202…
It's all about the scientific method and how it uses empiric evidence that can be challenged and must fit into a plausible theory that can be disproven.
The wikipedia entry is short but good (en.wikipedia.org/wiki/Scientifi…).

But even more than an elaborate method, science is a mindset.
Read 9 tweets
AukeHoekstra Profile picture
16 Oct
.@MLiebreich proposes to base EU policy on aggregated telemetry data instead of lab. tests. Of course! Why didn't I think of that earlier?
The problem with the lab tests is that they don't reflect reality. They are paid for by the manufacturers instead of by an independent and adversarial organization like the EPA. The manufacturers use loopholes to game the tests. (This part of the problem doesn't exist in the US.)
But even if we organised EPA style advesarial testing, it is very hard to account for actual use. E.g. of plug-in hybrids that can or cannot be a match for someone's travel pattern and can or cannot be plugged in all the time.
Read 4 tweets
AukeHoekstra Profile picture
14 Oct
New paper in @Nature shows how to prioritize ecosystem restoration for maximum effect: 60% less extinctions and 300 Gt CO2 stored by restoring 15% of converted lands.

nature.com/articles/d4158…

nature.com/articles/s4158…

I think fertile land is our most precious commodity.
As @hausfath points out (ht @Gio_tweets) the authors equate 300 Gt CO2 to 30% of human emitted CO2 that ended up in the atmosphere since the industrial revolution.

This is technically true, but it's only 15% of all CO2 we emitted.

What's going on here?
Well, the fact is that humans emitted 2000 Gt CO2 and only half of it ended up in the atmosphere. The rest was absorbed by the oceans (and the land).

Why is that important?
Read 7 tweets
AukeHoekstra Profile picture
14 Oct
The aviation industry is pretending to work on emission reduction but in fact its 'behind closed doors' lobbyist dominated ICAO organisation and the Corsia program seem only intend on cooking the books.
Also, not mentioned by prof. Helge Peukert is the idea that your flight doesn't emit CO2 because the airline planted trees. Unfortunately that is something we need to do anyway and the amount of trees you can plant and its effect is limited.
So we are left with an industry that only want to grow, knowing that this means more CO2 emissions, and is trying every trick in the book to avoid improving the situation. This needs to change!

Let's start by having them pay taxes just like everybody else. Esp. tax kerosine!
Read 5 tweets

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