this post was submitted on 24 Sep 2024
161 points (98.8% liked)
Technology
60060 readers
3114 users here now
This is a most excellent place for technology news and articles.
Our Rules
- Follow the lemmy.world rules.
- Only tech related content.
- Be excellent to each another!
- Mod approved content bots can post up to 10 articles per day.
- Threads asking for personal tech support may be deleted.
- Politics threads may be removed.
- No memes allowed as posts, OK to post as comments.
- Only approved bots from the list below, to ask if your bot can be added please contact us.
- Check for duplicates before posting, duplicates may be removed
Approved Bots
founded 2 years ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
Leaving the train at 1/3rd the speed it decelerated from?
What's really happening:
Barcelona want to use regen braking to reduce power usage of their metro - this is good.
Adding batteries to store all that energy for 30seconds at each stop is impractical in some way. It makes the train too heavy / They can't charge quick enough / The charging loss is too high. So, they go for a smaller battery.
The electrical grid gets the rest of the energy dumped into it, only to supply it back to the train when it accelerates again. They use the grid like a battery.
Some public relations person heard this and issued a press release - "Barcelona using metro as power station".
Every engineer working on the project simultaneously groans in despair. The resulting low frequency wave shakes the foundations of Sagrada Família, setting the construction back another generation.
Ay, ¡qué lástima!
I'm still not paying a full ticket, I'll wait until I can see a whole basilica.
Are we sure the Sagrada Familia isn't a source of perpetual energy?
If they ever finish SF it will kind of feel wrong.
But I guess there have been generation projects in the past. They Pyramids, etc.
We just finally get to see what one feels like.