Endless Sphere

One thing we can work out from real-world data is how big a Tesla battery would have to be to merely run 259GW/259,000MW of power from batteries just for a tiny >24 hour< period, the thing is though when you examine the extreme variability of power in renewables a week worth of battery or even 6 mo...

All of these reports confuse the terms " Power" and "Energy" with electricity. Which is only 20- 40% of total energy consumption. If California produces 50% of it's ELECTRICITY from rebuildables by 2050, it is still using 80% of it's total energy from non-renewables. Most of which is fossil fuel. P...

You need a reality check.. I never said SolarPV needed. "a lot of maintenance", What i said was they wont last 50+ years. Obviously you can't even remember what you wrote. I will help you: Obviously the idea that a solar farm could function for 30-50 years without major rebuilds and upgrades , is l...

Solarmoduls in Germany will last more than 20 years on average. Don't forget to cut your numbers in half for solar PV in Germany since the capacity factor is averaging only 11%. "Capacity factor" is already included in 1000h/ year in that calculation. That's 1000h/8760h = 11.4% cutting anything in ...

Afaik(!) there are now saws down to 100µm and Recycling not only for SiC dust but also for Si dust. I have some numbers on energy usage but they are not published. What has been published is the numbers for the Solarwold concern in 2015. They used (including everything) 0,52kWh/Wp. That's not the en...

. Here is the functional link to the EROI study. . http://festkoerper-kernphysik.de/Weissbach_EROI_preprint.pdf . What do you expect from those nuclear addicts? "...The numbers in Tab. 2 (data taken from Scholten et al. [23]) are calculated for 1m2 poly-crystalline modules, for which 1.6 kg metallu...

I should have added: Let's just disregard Nuclear for now since nobody wants that. My concern is the ER/EI of solar PV in Germany performing at 4:1. Other studies have it no higher than 7 worldwide. Without any storage. Which would cut it in half. At this point it would be barely better than nothin...

A German/Swiss "investor-team" plans to buy the BionX motor production and offer BionX products in Europe and maybe also North America:

https://www.sazbike.de/hersteller/bionx ... 50642.html (in German)

So there is still some hope.

Last night, I finally attempted to quantify the aerodynamic gains and the results are inconclusive. I don't have access to a wind tunnel or even an indoor track (anyone in the SF Bay Area in a position to help with that? :D ) so I did a series of coast down tests from 25 mph (40 kph) and power usag...

And your solar farm hiding behind a hedge ?. :lol: :lol: ... I doubt Germany has a single field big enough to accomodate a 15 TWh capacity solar farm ( That is the annual capacity of a typical 2GW coal generator plant ) Surprise, suprise: There is no need to put all solar panels in just one sibgle ...

A paper plan is just that...a plan on paper ! ... It does not answer any of the questions. Accellerated installations beyond previous achievements ..how ? What the hell are you talking about? Germany installed more of 7GW PV anually during 2010-2012 and the months with highest instalaltion rates ha...

It takes 50 GigaFactories 20 years to make that many batteries. We currently have a world equivilent of 2.5 Gigafactories. And 5 years in, 2 cycles per day puts the first ones at 3,600 cycles and will need to be replaced all over again.. . The Chinese alone will be able to build 50 "gigafactories" ...

:shock: 60% RE for Germany within 12 yrs ? ....You are dreamin' ! How will that be achieved ? ... To do it means they will have to double the (32%) RE content that has taken 30 yrs to install in 1/3 the time.....as well as replace much of the existing wind equipment at the same time. See: (real num...

Its irrelevent how many electric cars are on the road...its the generation source that matters.. Of course not. One electric car more is one gasoline car less (+/-) Even with actual electricity Generation e-cars are better in greenhouse gases and obviously much better compared in local Emission, wh...

Check the data,.. It isnt.. In Germany solar is less than 2% of the generation source for the 3 winter months ..Nov, Dec, Jan.....As pcompared to 12% in the peak summer period. PS:-... That 2% contribution from solar is approx an average of 1.4GW generated from the 40+ GW installed solar capacity !...

Interesting that the contribution for solar is almost constant (7% +/- 0.3%[abs]) throughout the year. Even though we've learned in this thread that solar doesn't work during the winter... Of course it is NOT constant. A halfyear includes half a winter and half a summer, that's why it does not diff...

Electricity source. The words " energy" and "power" are bandied about with regard to Rebuildable Electricity as if this is the total of energy that we are using but electricity is just a small part. There is 5X very expensive work to be done to convert all of society's energy consumption to electri...

The discussion was about the polution from RE magnet manufacturing...not their availability ! Your part in this discussion is more about constantly denieing pollution from mining and burning coal and preatching the benefits of nukes. Sadly this made it impossible to believe that you care even the t...

..will use the strongest RE magnets ... "Rare Earths" are not rare: https://static.businessinsider.com/image/4ccf0c49cadcbb2039020000-750.jpg If you care so much about ressources (which I doubt anyway) stop buying and using cars with ICE. You need platinum or palladium for them (abvout 30% gets los...

Renewables overtake coal as Germany’s most important power source https://www.cleanenergywire.org/news/renewables-overtake-coal-germanys-most-important-power-source https://www.cleanenergywire.org/sites/default/files/styles/lightbox_image/public/images/article/2018/07/bdew-h1powermix2018-en.png?itok...

At the pedicab manufacturer I work for, we tried to get our latest batch of disc brakes furnished with 2.3mm thick rotors rather than the usual 1.8mm rotors. The brake manufacturer refused, saying the calipers weren't compatible with their own rotors that were only 0.5mm thicker. New Magura rotors ...

But for Pete’s sake I can’t believe that anyone is still claiming that when it comes to effective stopping power, rim brakes are just as good (even better!!) than disc brakes. The ONLY reasons to run rim brakes on an ebike are compatibly with your existing parts, or cost. And I do not understand th...

Yea, like real flat proof tires. Not like the ones around now, something with real puncture proof material in the tire itself so we don't need to add anything between the tire and the tube. We are running motors after all, we can make up for the weight increase of the tire. This is a new airless sy...

Thanks a lot for the data on your "perfect day". Highly appreciated. I hope that someday after the trip there will be data available for every day and every vehicle involved. That would be great. Can you show data from a day with rainy or overcast weather, too if you find some time to do so? I wonde...

So I got a bit over a 50% refund for these cells. Bit of a bummer I have ended up paying for a bunch of pretty crappy cells. You live and learn I guess... At least you suppored another fake seller. If the buisness selling fake cells works fine why should they ever stop it? If your cells have only 1...