The Alternative Green Energy Thread

GreatApe

1961Nick wrote: »

Time to baton down the hatches & get serious about our flood defences?

https://www.bbc.co.uk/news/science-environment-50547073

If it was an actual problem there are solutions to cool the planet directly rather than try to cool the planet indirectly with lower CO2

ed110220

GreatApe wrote: »

If it was an actual problem there are solutions to cool the planet directly rather than try to cool the planet indirectly with lower CO2

If one is interested in the actual science rather than just sloganeering, it's interesting to look into the actual science of this (geoengineering).

Very briefly, an Earth warmed by GHG increases and then cooled by some form of reflection of incoming solar radiation would not be the same as the Earth before GHG warming. Most notably, rainfall patterns would be expected to be markedly different and drier overall with important impacts on agriculture. The monsoons of Asia and West Africa are expected to be weakened.

As geoengineering would be well within the abilities of one powerful country or a group of countries, it would raise potentially very difficult issues. Imagine for example the USA or Europe faced with rising sea levels or agricultural losses decided to resort to geoengineering that lead to crop failures in India, West Africa or China. That could easily cause humanitarian disasters or even a major war if one power did something that benefited itself at the cost of causing crop failures in another.

GreatApe

ed110220 wrote: »

If one is interested in the actual science rather than just sloganeering, it's interesting to look into the actual science of this (geoengineering).

Very briefly, an Earth warmed by GHG increases and then cooled by some form of reflection of incoming solar radiation would not be the same as the Earth before GHG warming. Most notably, rainfall patterns would be expected to be markedly different and drier overall with important impacts on agriculture. The monsoons of Asia and West Africa are expected to be weakened.

As geoengineering would be well within the abilities of one powerful country or a group of countries, it would raise potentially very difficult issues. Imagine for example the USA or Europe faced with rising sea levels or agricultural losses decided to resort to geoengineering that lead to crop failures in India, West Africa or China. That could easily cause humanitarian disasters or even a major war if one power did something that benefited itself at the cost of causing crop failures in another.

Good thing fossil fuels have made humanity magnitudes more resistant to famine death and destruction

The reality is humanity has never been so healthy so wealthy and so resistant to the destructive forces of nature death and disease

Famine don't happen because food is now global
If the Irish run out of potatoes they can import 100,000 tons of base ingredients with a ship for pennies per thousand calories

Also it's ridiculous to only point at potential negatives
Yes some areas may get marginally worse but other areas will get marginally better
If anything crop yields are likely to be higher as more of the world adopts fertilisers and modern farming practices and yes even higher CO2 will help

As for the dangers of geoengineering
It's not dangerous because we are no longer at the mercy of nature and chance thanks to development and thanks to fossil fuels we have an abundance of more or less everything (well by we I mean the top half of the world the bottom 3.5 billion sadly still do not have full access to affordable fossil fuels so do indeed suffer)

Overall as I keep saying this really isn't a big problem
Fossil fuels accelerated human development by at least 100 years
Fossil fuels saved many millions of lives and probably hundreds of millions of sick days just in the UK

Overall fossil fuels were a massive net positive they still are today and they will be for decades to come despite the hysteria reality always wins

JKenH

JKenH wrote: »

I did though get the chance to have a good chat with a Uber taxi driver while he was getting a free top up charge. He tells me he has the only BEV cab in Sheffield. He is really into his EV having his Leaf Spy app permanently displaying data on a separate phone in the car.

He bought his 30kwh leaf 3 years ago and has done 78k miles in it. He is very careful about battery charging and only charges it for 2 hours at 6.6 kW each night on E7. (4.10 am to 6.10 am). He then tops up during the day not exceeding 80% charge while he has a break. He showed me the state of health of the battery on his Leaf Spy app which indicated the battery is at 100.7%! He is hoping to run it for 300k miles.

I now have the Leaf Spy app on my phone which among other things lets me check the state of health of the Leaf battery. Compared to the taxi driver above I was very disappointed to see the SoH of my Leaf battery was only 92.84% after 16000 miles.

Reading around I came across this very interesting paper on Nissan Leaf battery degradation. Now I am sure anyone who wants to can pick a lot of holes in the sampling method and interpretation of the data collected but it does suggest that the 30 kWh batteries degrade more quickly than the 24 kWh ones. What is also apparent is that use and charging can have a very significant impact on battery SoH. The taxi driver I met on his second Leaf has got it sussed it would seem.

https://www.preprints.org/manuscript/201803.0122/v1/download

1961Nick

JKenH wrote: »

I now have the Leaf Spy app on my phone which among other things lets me check the state of health of the Leaf battery. Compared to the taxi driver above I was very disappointed to see the SoH of my Leaf battery was only 92.84% after 16000 miles.

Reading around I came across this very interesting paper on Nissan Leaf battery degradation. Now I am sure anyone who wants to can pick a lot of holes in the sampling method and interpretation of the data collected but it does suggest that the 30 kWh batteries degrade more quickly than the 24 kWh ones. What is also apparent is that use and charging can have a very significant impact on battery SoH. The taxi driver I met on his second Leaf has got it sussed it would seem.

https://www.preprints.org/manuscript/201803.0122/v1/download

The chart was interesting ... If you extrapolate the SOH of the 30kWh Leaf battery to 3.5 years, it would have the same capacity as a 24kWh Leaf ... around 21kWh.

EVandPV

JKenH wrote: »

I now have the Leaf Spy app on my phone which among other things lets me check the state of health of the Leaf battery. Compared to the taxi driver above I was very disappointed to see the SoH of my Leaf battery was only 92.84% after 16000 miles.

That is a bit concerning.
I don't know much about the Leaf but the 22kwh Renault Zoe has a BMS that needs occasional updates and there's been reports of the SOH actually increasing after the update.
Presumably, the SOH reported by the BMS was just out of whack and the update sorted it.

JKenH

EVandPV wrote: »

That is a bit concerning.
I don't know much about the Leaf but the 22kwh Renault Zoe has a BMS that needs occasional updates and there's been reports of the SOH actually increasing after the update.

I am hoping to improve the SoH of my battery with a more sympathetic charging regime.

1961Nick

JKenH wrote: »

I am hoping to improve the SoH of my battery with a more sympathetic charging regime.

Send it to Taxi Driver Boot Camp.:)

joefizz

ed110220 wrote: »

As geoengineering would be well within the abilities of one powerful country or a group of countries, it would raise potentially very difficult issues.

I was in Moscow in 1998 at the same time as the world youth games were being hosted there. My guide told me that during the entire time it was guaranteed it wouldnt rain in Moscow as bombers had been loaded with silver iodide and they were dumping it on rain clouds outside moscow to stop the rain. Apparently been doing it for years for all sorts of may day etc celebrations.
I mentioned this to a few other people I met there and none of them batted an eyelid. First time Id ever heard of it (other than something about ho chi min trail during vietnam war).


Theres all sorts of proposals like it for high altitude screening using water vapour or other such to reflect light etc. Seems like a really good idea, balls up the planet going one way then balls it up again going the other.


The ultimate answer is to stop making new people and if we dont sort that ourselves, mother nature is going to do it for us...

JKenH

The busiest travel weekend of the year was an interesting test for Tesla's fast-charging network.

https://www.thedrive.com/news/31274/more-teslas-on-the-road-meant-hours-long-supercharger-lines-over-thanksgiving

One Facebook clip shows a line measuring roughly a quarter mile in length, consisting of 50-odd Teslas waiting at a Supercharger in Kettleman City, California