There was an Ubuntu engineer recently talking about using the rust coreutils which are bsd licensed instead the old gpl ones. But he made it clear it was more about “rust is better” than anything to do with the license.
They have been controlling hot water tanks in New Zealand for decades… probably since the 70s. They use what they call a ripple signal by adding 400 hz on top of the 60 and then relays on your hot water tank detect the 400hz and switch it off
We also control (or used to control) our street lights in AoNZ using ripple control (it was implemented with a tuned reed relay in some towns). Back in the 70s friends built a ripple transmitter and sent morse across Ōtepoti by turning on/off their suburb's street lights (at 2am)
I’ve been a happy redmine user for about 15 years. It may not look as flashy as newer systems but I appreciate the consistent UI which hasn’t broken, and someone is doing the hard work of making non flashy but extremely useful things like e-mail workflows, export as PDF, git integration, etc stay working
Looking forward to checking out your library, thanks for sharing it with the world.
I’ve been using kst-plot for live streaming data from instruments and interactive plots. It’s fast and I haven’t found any limit for the amount of data it can plot. Development has basically stopped - the product is done, feature complete, and works perfectly! It is used by European and Canadian space agencies. Maybe it will be interesting to you to see how they have solved or approached some of the same problems you have solved or will also solve !
Right, so that means that to produce 300MW reliably from the solar or wind farms you'd need about 900MW nameplate capacity. I'd be really curious about the solar side of it too and whether that 30% is overall or just during daylight. Either way, you end up having to overprovision the unreliable sources such that you have enough capacity to both charge your battery pack and provide power to the grid.
30% overall, including night time. Honestly seems high to me and makes me wonder if they have overprovisioned panels vs the maximum allowable injected power to get a better capacity factor.
The battery installed along solar farms is usually on the order of hours of energy delivery though. Like 5 hours. It’s fine, but not everyone will be able to ornaffors to buy electricity on when it is cloudy and still for a few days.
Sir Adam Beck #1 ten 25 Hz generating units were converted
to 60 Hz or modified as follows:
Units 9 and 10 to 60 Hz in 1956
Unit 3 to 60 Hz in 1970
Unit 4 to 60 Hz in 1984
Unit 5 to 60 Hz in 1985
Unit 8 to 60 Hz in 1990
Unit 6 to 60 Hz in 1996
Unit 7 to 60 Hz in 2009
Yep, the government had to go house-by-house, building-by-building replacing all electrically powered devices that could not be adapted. Thankfully it also happened early in the era of electronic devices.
it's substantially easier to run modern electronics off random frequency power than other stuff like an induction motor. A typical power supply is rated for 47 Hz- 63 Hz. But it'll happily run off almost anything higher than 10 hz and lower than 1000 hz.
universal motors in particular do not care at all about frequency
oh wow, 25 Hz was supplied to homes? I know New Orleans still has some pumps that run on some oddball frequency. It's part of the reason why they never work during the storms (when you need them). The "grid" is just a set of colocated generation sets
On submarines (still flying, just underwater), we don’t throw new underway buddies into the most difficult scenarios right away. We do give them a seemingly overwhelming amount of qualifications to achieve in a very short period of time, but we don’t make them practice the hard stuff until we’re sure that they understand the fundamentals. Because much like ATC, if you make a mistake hundreds of feet underwater (or thousands of feet in the sky), you’re gonna have a bad time.
…kind of. In reality, there is always a qualified individual ready to physically stop you from doing the wrong thing, and there are multiple independent safety systems, interlocks, etc.
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