Posts by Havant_Enviro@mastodon.sdf.org
(DIR) Post #APMmFTDwkE9auDMkF6 by Havant_Enviro@mastodon.sdf.org
2022-11-07T16:40:04Z
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The Udbyhøj Cable Ferry across Randers Fjord in Denmark is electric-powered: using a long mains cable!Video:https://youtu.be/MYqCWxdM4ww
(DIR) Post #APNAfzZbUVDLfFfvaS by Havant_Enviro@mastodon.sdf.org
2022-11-07T21:11:39Z
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@publius Similar to a chain ferry as a genre.
(DIR) Post #AQCzFkdorleSkRTcky by Havant_Enviro@mastodon.sdf.org
2022-12-02T21:10:44Z
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Version 2 of my attempt at understanding UK energy consumption. The future scenario assumes 100% electric road, rail and domestic heating (heat pumps only). 600 TWh would be needed, but there is still some 400 TWh of fossil fuels to replace.I've not reduced the number of journeys or cars.
(DIR) Post #AQD367psAtiTbZmQsq by Havant_Enviro@mastodon.sdf.org
2022-12-02T22:03:19Z
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@publius I've read some of that many years ago, but it has become a bit dated. It has inspired me and many others though.There are a lot of people now taking the analysis and calculations further.
(DIR) Post #AQEEHJr57VmmipqUpU by Havant_Enviro@mastodon.sdf.org
2022-12-03T11:43:21Z
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@publius Yep.This isn't intended to be a super accurate project. It is an ongoing one. You are doing what I intended it to do!Discussion.
(DIR) Post #AQEEYDxMIxVhLmqJ72 by Havant_Enviro@mastodon.sdf.org
2022-12-03T11:46:24Z
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@publius It doesn't matter if the assumptions are unrealistic.The point is to make people think and to understand that the task is complicated.I know the assumptions in the current illustration are unrealistic.I suspect no one will be happy with it.Which would indicate it's doing it's job.
(DIR) Post #AYxJ4p5n45d0mjGfy4 by Havant_Enviro@mastodon.sdf.org
2023-08-21T12:34:10Z
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@matthannon Swings and roundabouts!
(DIR) Post #AYztLb1WbwAgjxURf6 by Havant_Enviro@mastodon.sdf.org
2023-08-22T18:28:16Z
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Batteries replace decommissioned power station site at Ferrybridge.Planning permission is also given for another battery set up at Fiddler's Ferry.https://renews.biz/87626/sse-renewables-breaks-ground-at-ferrybridge-bess/
(DIR) Post #AZ07ESCGQf42hC09vk by Havant_Enviro@mastodon.sdf.org
2023-08-22T21:07:19Z
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@publius Batteries or any storage isn't intended to be a generation source, it's just that the old sites are being used for a new purpose.The generation will come from renewables and probably some nuclear.In particular lithium ion batteries are mainly targeted for frequency stabilisation on the grid not long term storage.
(DIR) Post #AZ34AtVlDRDJrabzkm by Havant_Enviro@mastodon.sdf.org
2023-08-24T07:16:46Z
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@publius "The point is, you still need those 2 GW of generation somewhere. "I said that in the reply.Most coal fired power stations in the UK have been decommissioned and the land reused."need MORE gigawatts of generation, if you have heat-pump and battery-electric-car mandates."We need more power (electricity), but less energy.Total energy consumption would drop by about 1/3 if all land transport is electrified and heat pumps are deployed.
(DIR) Post #AZ34dB7zJMOUbmymDQ by Havant_Enviro@mastodon.sdf.org
2023-08-24T07:22:07Z
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@publius "The more systems like this you need to stabilize the grid (which thermal power stations do at no extra charge),"Storage and renewables are one system.Thermal power stations have a different model of economics for running them to renewables because they need fuel every second of the day.So a direct comparison of capital or build costs is false economics.
(DIR) Post #AZ3q74CoJA2HflzMUy by Havant_Enviro@mastodon.sdf.org
2023-08-24T16:14:19Z
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@publius More electricity is needed, that is what I stated.Burning gas in power stations isn't a long term option.The UK needs to produce about 800 TWh of electricity per year from low carbon sources.But apart from that UK CCGT power plants are 50 to 60% or more efficient.
(DIR) Post #AZ3qP6wWrwu1NJyeye by Havant_Enviro@mastodon.sdf.org
2023-08-24T16:17:36Z
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@publius 30% capacity factor is only for onshore wind, you are being deliberately misleading by quoting that.Offshore wind which is and will always be more prevalent is far higher.Nuclear power has a place but no one wants it in their back yard so in the UK will be limited.Nuclear is also extremely expensive and will only get more expensive.
(DIR) Post #AZ63X7fnj2yLg1DuhE by Havant_Enviro@mastodon.sdf.org
2023-08-25T17:54:04Z
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@lowqualityfacts Is that photo in the public domain because it's a US government photo??If so, he might regret putting out there!A lot of US government photos are copyright free.
(DIR) Post #AZYHynyTAWXE4NP4uu by Havant_Enviro@mastodon.sdf.org
2023-09-08T08:47:38Z
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Well Vivaldi is based on Chromium.It's ok as long as that doesn't have privacy issues.
(DIR) Post #AhsjRzy4PXMmcUuAxk by Havant_Enviro@mastodon.sdf.org
2024-05-14T07:38:31Z
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@TatianaIlyina Something that never gets discussed openly is the carbon emissions created by war/conflict.I don't just mean by the vehicles etc. But the carbon cost of rebuilding once the conflict is over.Even during the conflict, if a building is effectively demolished, the carbon footprint of that building goes up, because it no longer has a productive purpose.(the carbon footprint of construction remains)I don't understand why climate scientists don't make a bigger issue of it.
(DIR) Post #AhsjS1XYZ5LXUqW1ui by Havant_Enviro@mastodon.sdf.org
2024-05-14T07:42:24Z
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@TatianaIlyina I did a simple theoretical calculation yesterday for a theoretical building that was destroyed about a 1/3 through it's practical life time. Assuming it was rebuilt, then the construction emissions expressed per year is more than 3 times that of it 'living' out it's 'life' in peacetime.Obliviously it depends when the building was destroyed, but in most cases they aren't going to be destroyed at their end of life.
(DIR) Post #AiafItyg9Qo0CK5t2G by Havant_Enviro@mastodon.sdf.org
2024-06-04T17:07:24Z
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@ajroach42 Regarding power grids.You need to understand the engineering and logistics.Centralisation made sense if you need to get fuel to a power station. We went from hundreds of small power stations and hence hundreds of small transport logistics problems creating a complex network, to a much reduced transport network.But renewables doesn't need a transport network to feed the solar panels and wind farms.Often it's just the practicality of doing something that is the guide.