That's true, old school refrigerants like R-12 are awful. The downside of modern replacement refrigerants are high operating pressure (>100 bar for R-744/CO2) or high flammability for natural refrigerants like R-290 (Propane) and R-600a (Isobutane).
But these are solely engineering problems, and I'm happy to know that my R-290 heat pumps at home (Panasonic L & Wolf FHS) and A/C (Midea Xtreme Save Blue) aren't awful to the environment, once they reach EOL.
The neat thing about propane as a refrigerant is that it's a really powerful one, actually rather better than R12 in practical applications.
If you replaced an R134a fill with R290 you'd need about half as much gas and if it got out, it's got a Global Warming Potential of 3, making it three times as bad as carbon dioxide and about 475 times better than the same amount of R134a.
Even in a very large air conditioning system like in my elderly Range Rover, the 500g or so of propane it would need is about the same as the engine sucks up in about four miles.
The effect of that escaping into the atmosphere is about as bad as the amount of petrol you spilled the last time you refilled your lawnmower.
If you're worried about the ZOMG IT IS GAS IT WILL MAKE A GINORMOUS EXPLODISHION aspect like a lot of people are, ask yourself this - how many aerosol cans are in your car right now? Tin of deicer, tin of magic tyre inflater, maybe a tin of air freshener or WD40 or something? You're already carrying more propane around with you, rattling around loose at your feet.
Mostly yes, you need to vacuum it down well and make sure you have compatible oil in the compressor. Some types of plastic tubing aren't particularly compatible but for cars it's okay.
Came here to say this - I have fond memories of playing Midtown Madness 2 as a kid (IIRC it came bundled with our new Windows ME family PC). I remember when I had the chance to visit SF in 2005 and I would recognize so many of the streets from playing the game. Good times.
That’s if the voltage supply was stable and within electrical specs for a sufficient period of time. We can see this is a snippet 2 hours into the discontinous collection.
3.6V is the maximum value that the nrf52832 SoC can handle. I would suspect the VDD is variable.
I'm a noob when it comes to DBs, but stumbled upon using InfluxDB with Home Assistant - would you say that's a solid choice, or are there better alternatives out there?
InfluxDB is pretty much the most popular and widely used time series database.
The difference between just storing every value ever and a time series DB is that the latter one can reduce the data frequency when it gets older.
Like if you're measuring your fridge temperature, you might store it every minute. But do you care about 1 minute accuracy when the data is two years old? Would 5 or 15 minutes be enough?
This is what time series DBs do automatically.
They're also optimised for data that's formatted as <time stamp> - <values>, making inserts and queries fast for data like that.
Unfortunately DIY is limited to what is certified in France, Victron MultiPlus are certified all, Quattro so far are not, the sole battery from this shop allowed for a grid-connected system are the Pylontech. Still MUCH cheaper than what I've found from French shops anyway so a big thanks :-)
Yeah I think if you want to order from CATL directly, your chances for a reply are better if your order is worth some billions :-)
EVE cells are very famous in the DIY scene, you can get them via Alibaba/Aliexpress, or if you're in Europe from nkon.nl, they have a very good reputation.
"Solar energy is the most abundant energy resource on earth -- 173,000 terawatts of solar energy strikes the Earth continuously. That's more than 10,000 times the world's total energy use."
source: https://www.energy.gov/articles/top-6-things-you-didnt-know-...
I'd say we don't run out of renewable energy in the near future, we just have to collect more of it.
During cloudy winters in higher latitudes? During rainy season in lower latitudes?
Do you know that wind often goes to zero across Europe for days at end in Europe in Winter? Last winter that was the case for nearly 2 weeks. How much would battery storage cost to cover for that?
I'm pro nuclear but I refuse to accept pro-nuclear arguments when they don't match the problem at hand.
When you are talking about more nuclear, you are thinking almost decade from now.
If you get permission for a new nuclear reactor today, it starts to produce energy 6 to 8 years from now. It could be possible 3 to 5 years in the ideal conditions that never happen.
> If you get permission for a new nuclear reactor today, it starts to produce energy 6 to 8 years from now. It could be possible 3 to 5 years in the ideal conditions that never happen.
Starting producing energy is one thing, on top of that is the breaking point where it becomes economically viable to pay off the construction costs of those plants. For that we are looking into a 20-30 years timeframe when the plant starts to generate money back.
As much as I like the idea of nuclear power it just becomes less and less economically viable when renewables get cheaper. The only ways to build and run nuclear plants is through government funding or by keeping energy prices at a higher level to pay back the construction costs.
On top of it all you also depend on having trustworthy and stable governments to keep those plants operating safely for the 50-70 years period they should be running.
While they can't provide a baseload I agree, renewables can't provide the same steady output that nuclear can. I think it's sensible to consider solutions to this problem (like we see with many different ways being researched on how to store excess production) rather than believing nuclear still has a chance in the current landscape.
Like I mentioned, I do like the idea of nuclear power but it has many issues with construction costs, source of materials, safety, etc. aspects of it which mean many countries would be excluded from running reactors.
Technology for transforming/storing excess renewables' energy which in turn can then provide a baseload output are much more accessible to the rest of the world, and I believe it has a potentially much bigger impact fighting the climate crisis than nuclear can provide us in the next 20-30 years.
That's what is happening. People are jumping into conclusions that there is not enough energy to run those data centers. There absolutely is. It has been planned.
The video footage of suicide drones you can find on r/combatfootage is nearly always from custom drones, the giveaway is the analog video transmission. As the poster before said, DJI drones are only used for reconnaisance (for example DJI Matrice), where high-quality digital video transmission (and thermal image cameras) are very useful.
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