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Apr 2022
11:34am, 11 Apr 2022
29,760 posts
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macca 53
*(52.3%) I had hidden the data while I was posting!
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Apr 2022
11:36am, 11 Apr 2022
42,010 posts
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HappyG(rrr)
No macca, that isn't the point, surely.
It's not that the "electrons" coming into your house are green! It's that you are using power at a time when the whole of UK is generating electricity and using electricity that is green. So it's purely about time of day, effectively.
You could do it without the green data feedback loop. Just encouraging people to smooth out the day and night time would help, so that there were fewer spikes, because excess demand is what requires the rapid generators that can be turned on with just a few minutes notice - jet turbines, gas turbines etc.
Better storage would help too.
I think it's a useful thing in the arsenal of reducing peak consumption - only use electricity when renewable supply is greatest. Decrease the demand for the reactive gas turbines?
That's how I see it anyway.
The hardest thing for me is - is nuclear green?! (It counts as green because it's non carbon emitting, but I'm not sure I'm happy about it!)  G
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Apr 2022
11:54am, 11 Apr 2022
29,762 posts
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macca 53
So at 5.30 pm yesterday only around 2 gigawatts out of 30 gigawatt demand was green
At 11.00 am today 15.5 gigawatt was green out of 35 gigawatt total demand.
50% of the time you will be getting green (sometimes a bit more, sometimes a bit less) - so should we be turning stuff off when it’s not green (tea time, peak viewing time yesterday for example)? Doesn’t seem an easy sell to me unless we had boatloads of storage......
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Apr 2022
11:57am, 11 Apr 2022
12,341 posts
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jda
What really matters is the carbon intensity of the marginal production, not the average carbon intensity of the whole supply. That is, what additional power station will be fired up if I put on the kettle right now?
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Apr 2022
12:00pm, 11 Apr 2022
29,763 posts
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macca 53
What really matters is the carbon intensity of the marginal production, not the average carbon intensity of the whole supply. That is, what additional power station will be fired up if I put on the kettle right now?
From the 5.30 peak last night jda I’d say it was very definitely fossil fuel that was turned on
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Apr 2022
12:05pm, 11 Apr 2022
29,764 posts
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macca 53
Surely most people have fairly constrained time windows when they use most electricity (6-9 am and 5-10 pm ish).
Portugal prices electricity differently through the day to try to financially induce you to use at “cheap” times (or to smooth demand perhaps). We set our dishwasher and washing machine to be used overnight - but I won’t be changing my meal times 😀
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Apr 2022
12:28pm, 11 Apr 2022
3,046 posts
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JRitchie
I wonder if there is a regional impact to the device. The national grid ESO app I have practically always shows Scotland as low carbon intensity generation of electricity as that region is mostly green.
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Apr 2022
1:24pm, 11 Apr 2022
12,342 posts
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jda
EV charging will soon, I think, be a large fraction of load on the grid. It should be possible enough to make that smart enough to help smooth out demand (and make full use of renewables).
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Apr 2022
1:30pm, 11 Apr 2022
17,926 posts
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3M (aka MarkyMarkMark)
Nice bit of good, simple, "pick it up & tidy up" messaging on Countryfile last night around beaches and waterways.
That's the kind of mass "sell" we need to get people not to be such inconsiderate litterbugs, especially with their plastic.
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Apr 2022
2:28pm, 11 Apr 2022
42,011 posts
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HappyG(rrr)
Yes, but I gave some examples of ones you can schedule
* Washing machine / tumble dryer (pretty energy intensive)
* Slow or long cooking
* Battery charging - computers, phones etc.
* Car charging - the biggest, most obvious one
Financially incentivising is the best way. But even then, it's partly about people realising.
My car costs £1.50 for a half charge overnight. It costs £4.50 during the day. So I have 90% plus done the night time charging.
But a washing machine is pretty energy intensive, and I never set it to run at night. Why not - because it's a bit harder and probably not so obvious how much money it costs or saves me.
Anyhoo, I think everyone can see how it would be helpful to get people to use off-peak wherever possible and reduce peak energy demand. G
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