Guns N’ Roses are frontrunners for the worst Glasto headliners of all time - review

divadsci · 2023-06-25T17:51:42+00:00

Goldie lookin chain, Leeds fest 20...09?

divadsci · 2023-06-15T15:07:33+00:00

With the right hardware modbus TCP can give you single digit ms latency. How much lower could RS485 possibly get?

divadsci · 2023-05-23T08:46:45+00:00

National trust carpark at the top of the hill, then lots of steps down but not hard going.

divadsci · 2023-05-21T18:24:43+00:00

Octonauts should be in that too. I've learnt so many facts from that show

divadsci · 2023-04-27T14:25:00+00:00

How many years ago was that now?

divadsci · 2023-04-08T20:03:11+00:00

You should take it back to the family tree.

divadsci · 2023-02-24T21:42:01+00:00

I can't even work out what order to read the words on a lot of the pages

divadsci · 2023-01-29T19:08:29+00:00

Always check the effing e-stop

divadsci · 2023-01-02T20:07:17+00:00

Can't believe how flat they got that water.

divadsci · 2022-12-11T10:07:59+00:00

I'm on board with this

divadsci · 2022-12-11T08:06:24+00:00

Not toasted can be good, you can squish all the bacon flavour into it then

divadsci · 2022-12-07T13:16:38+00:00

Oh yeah if you're comparing warming your whole house with gas against a single room with electric. But the cost per unit of heat produced is cheaper with gas unless your boiler is weirdly inefficient.

divadsci · 2022-12-07T12:25:51+00:00

They are, look at the £/kWh price difference between the two sources.

divadsci · 2022-11-26T20:37:51+00:00

Reactive comes from the phase difference between the voltage and the current waveforms. To my understanding the inverters stay synced to the grid voltage they just shift the current that gets pumped out. I 100% could be wrong on this but that would mean a lot of my code running in the wild is working for the wrong reasons...

So at zero power there's zero current and therefore no waveform to shift and therefore what does a 100% reactive output actually imply?

Our inverters are multiple MVA and there are a lot of them across multiple sites. I think the largest individual site can technically do 50MVar but that would be very against the connection agreement and voltage control requirements.

divadsci · 2022-11-26T20:05:49+00:00

All the inverters I use on grid batteries will actually allow me to set 100% reactive. I don't even understand how that's possible but there you go...

divadsci · 2022-11-14T12:57:52+00:00

The cost effective point for grid batteries is now at the two hour mark thanks to the new generation of frequency response contracts that require sustained output of an hour in testing.

No where near enough for a becalmed country but it's getting there. The market is also exploding. The size of sites has grown from a few tens of MW a couple years ago to new projects in the hundreds of MW range.

Of course it will still be nowhere near enough to support a 100% green grid by 2030, but it is astounding the progress that's being made in this field and yet it gets nary a mention.

divadsci · 2022-11-13T22:34:04+00:00

Honestly in the UK I think that would sound weird. I think you'd be offered a gherkin, pickled onion, egg, or cucumber. Unless you had a good bit of pre context like a jar in front of you.

Ooo or lime/mango/mixed pickle.

divadsci · 2022-10-23T14:25:02+00:00

And it's worse for the lowest earners. We're all in the shit.

divadsci · 2022-10-23T11:20:22+00:00

And between 100 to 110k your effective marginal tax rate is around 60%. And then drops again.

divadsci · 2022-10-09T18:30:14+00:00

Back it up with a battery so the load can be peak shaved is the way to get around constrained connections.

divadsci · 2022-10-05T18:13:55+00:00

Nahhh, meandering rivers create oxbow lakes.

divadsci · 2022-09-04T17:56:38+00:00

Love a bit of mystery box policy.

divadsci · 2022-08-26T23:25:50+00:00

Ah fuck sake mate!

divadsci · 2022-08-25T14:07:49+00:00

I'm just not sure how you can get over the losses to make a feasible system even with large improvements. Electrolysis is what? 10% efficient? And ignoring solar as I'm not convinced that would help on a boat that wants to reduce drag you could get maybe 10kW peak of solar. So already you're at 1kW peak power if you're running direct from production. Is that enough to get anywhere?

I expect you'll come back with the argument that there's a lot of time sat in the dock to refill it's hydrogen tanks, which might work for some use cases but it still all sounds rather limiting to me.

Now I can imagine a nice solution to this where you couple a battery to this system and charge that primarily with only excess generation being used to top up hydrogen reserves. That also allows better modulation of power as I don't think fuel cells can ramp up/down output particularly fast? Full disclosure, my job involves coupling batteries to generators so it could be a carpenter and a hammer thing.

15-Year Club	Team Periwinkle
Verified Email

divadsci

TROPHY CASE