Omacitin

joined 1 year ago
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Tesla to bring electric semi truck production to Gigafactory Berlin in c/evs@lemmy.world
[–] Omacitin@lemmy.world 3 points 8 months ago

Wikipedia says Europe uses mainly the shorter cab-over-engine tractors in order to maximize trailer length while staying under the total length limit. They commonly pull standard ISO shipping containers, so in that case at least the difference is all in the tractor.

Largest US solar-storage project goes online in c/science@lemmy.world
[–] Omacitin@lemmy.world 14 points 10 months ago

The storage capacity is sized for daily consumption, not the yearly figure you quoted. And of course, this is one small project out of the hundreds of plants that will be needed to meet climate goals.

The biggest issue with solar right now is that the output varies over the course of the day, leaving other power plants to take up the load at night or during cloudy weather. The attached battery storage averages out the solar plant's output, letting it be a useful contributor to the grid around the clock. There's other benefits like grid stabilization and peak shaving, where the battery stores and releases oversupply from the rest of the grid, not just the attached solar panels.

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Multi-Criteria Fire Alarms (lemmy.world)
submitted 10 months ago* (last edited 10 months ago) by Omacitin@lemmy.world to c/homeassistant@lemmy.world
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Hey all,

This is only tangentially related to HA, but it seems like this crowd might have answers. HA integration would be nice but is not required

We moved into a new house about 3 years ago and have been plagued by nuisance alarms ever since. They happen most often in the middle of the night, but aren't uncommon in the daytime.

I have:

  • Replaced all the old hardwired detectors with new battery-only ones thinking it might be caused by EMI.
  • Ruled out insects crawling into the detectors.
  • Sealed the electrical boxes thinking it might be dust from the attic.
  • Installed an excellent filter system in the HVAC.
  • Cleaned out all of the detectors with canned air.

Other random info:

  • Only the ones on the second floor go off. There are five upstairs and two downstairs.
  • I'm pretty sure one (and only one) of the false alarms was caused by humidity from a shower.
  • Seems like they're happening less often since I installed a new HVAC system, but that could be due to less dust or due to smaller temperature swings (less of a setback at night).

I think at this point I want to get some fancy multi-criteria alarms, ones that are specifically for reducing your nuisance alarm rate. Also for increased capability, though - one of my coworkers just narrowly escaped a housefire with his wife and dog. Their fire alarms failed to go off and he was only woken by the sound of the flames.

Any suggestions for multi-criteria alarms that work with hardwired 120VAC, preferably with hardwired interconnection?

Would a mechanical counter pressure suit make you poop? in c/askscience@lemmy.world
[–] Omacitin@lemmy.world 7 points 10 months ago (2 children)

But the pressure from the atmosphere applies to both sides of the sphincter, resulting in zero net pressure. Unless the suit actually does press against the outside of the sphincter like it does the rest of the body, I think OP's concern about the suit squeezing you like a tube of toothpaste is valid.

Maybe the suit only applies a few PSI instead of the full 14.7, which it seems like one's sphincters would be able to withstand.