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The demise of UK fossil fuel Power Stations

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Michael Gilligan20/01/2021 10:10:08
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18970 forum posts
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Not sure if this will ever make it back onto iPlayer, but it was surprisingly good viewing:

**LINK**

https://www.bbc.co.uk/programmes/m000lzmn

Lightweight, but very nicely done.

MichaelG.

Martin 10020/01/2021 16:40:41
274 forum posts
6 photos
Posted by Stuw on 18/01/2021 12:16:13:

The coal fired power stations / boilers were inefficient (~ 22%)

There wasn’t a single coal fired power station in the UK operating in 1990 with a thermal efficiency under 30 percent

22% is in the region of sub 60MW units dating from the 1950’s and earlier equipped with chain grate boilers, phased out or permanently mothballed in the early 1980’s

The top performing 500MW and 660MW units at the likes of Drax, Rugeley, and Ratcliffe were all operating between 35 and 37%. Even the very worst of the 500MW units were operating at around 31-33% by the early 1980’s, as were smaller two shifting 120MW units on 160 bar steam conditions.

Robert Atkinson 220/01/2021 18:19:57
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Burning wood pellets produces about 5% MORE CO2 than burning coal (twice as much as gas) not including the energy used to process and dry the pellets or shipping. Leaving the trees growing and absorbing CO2 and burng coal would result in less CO2 in the atmosphere. It's not clear that new trees are being planted at the rate required to replace those cut down., never mind provide future fuel reserves.
Ships only use diesel in coastal waters. Out at sea they use heavy fuel oil typically with high sulphur content.

Robert G8RPI.

Mark Rand20/01/2021 20:50:25
1061 forum posts
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Unfortunately, after a while, trees stop absorbing CO2. Then it gets released, along with a certain amount of methane.

Process is known as rotting...

Burning them releases the CO2 they absorbed while growing. So does burning antediluvian ferns, but they can't be regrown...

Bob McDougall20/01/2021 22:49:32
40 forum posts
224 photos

Visit to Drax in around 2004, I sneaked up to one of the turbine shaft housings and kissed it. Those bearings were smoother than .... well Cold unmoving and very beautiful.

very efficient as pressure differential to current flow converters.

solid state would be nice.

i think most places have realised coal is finite but the solutions differ,

Swindon Honda factory, as a wind turbine manufacturer. (no affiliation )

Hopper20/01/2021 23:24:07
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Posted by Bob McDougall on 20/01/2021 22:49:32:

Visit to Drax in around 2004, I sneaked up to one of the turbine shaft housings and kissed it. Those bearings were smoother than .... well Cold unmoving and very beautiful.

Now that's taking your power station porn very seriously! laugh

Bazyle21/01/2021 11:55:28
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Did anyone else hear the recent Radio 4 program about how trees growing in northern lattittudes is actually worse for the environment and global wrming than the natural grass they displace?
A complex interaction of grass attracting animals that trample the snow preventing it from insulating the soil so allowing the cold to penetrate making deep permafrost so sustaining the snow in summer to reflect more light/heat which has to be balanced against the methane produced by those grazing animals. But still actally better than trees.

Hopper21/01/2021 12:03:37
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Posted by Bazyle on 21/01/2021 11:55:28:

Did anyone else hear the recent Radio 4 program about how trees growing in northern lattittudes is actually worse for the environment and global wrming than the natural grass they displace?
A complex interaction of grass attracting animals that trample the snow preventing it from insulating the soil so allowing the cold to penetrate making deep permafrost so sustaining the snow in summer to reflect more light/heat which has to be balanced against the methane produced by those grazing animals. But still actally better than trees.

Wow that's a delicate balance. Who would have thought? I guess some of those tree-huggers will have to become grass-grabbers.

not done it yet21/01/2021 12:45:32
6343 forum posts
20 photos

Where does ‘northern latitudes’ start?

Certainly not (much) of England, while we have the gulf stream maintaining a maritime climate. Scrub might be more like it - unless it is humans, over-running the country, that are making the difference. Snow in summer would also reduce any grasses, thereby reducing the grazing animals.

Without human interference, there would also be much more equatorial forest - not so much grass there, I suppose?

Remember, too, that coal was once trees.

Michael Gilligan21/01/2021 13:06:32
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18970 forum posts
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Posted by not done it yet on 21/01/2021 12:45:32:

Where does ‘northern latitudes’ start?

.

immediately North of the Equator devil

But more realistically : immediately North of the Tropic of Cancer.

MichaelG.

.

Ref. https://www.thoughtco.com/equator-hemisphere-tropic-of-cancer-capricorn-1435089

Edit: __ and ‘High Northern Latitudes’ are apparently >50° N

Ref. https://pubmed.ncbi.nlm.nih.gov/24890614/

Edited By Michael Gilligan on 21/01/2021 13:11:49

not done it yet21/01/2021 14:26:35
6343 forum posts
20 photos

But it only refers to ‘northern’ latitudes?😼

Seems as though the programme was fairly much rubbish? Or it was referring to particular latitudes? There is a lot of grass on the savannahs - but not much permafrost in those regions? Is southernmost latitudes were included, there ain’t a lot of much anything down at the Antacric?

Claim’s without detail are about useless, as are suggestions that it is simply more than about 23 degrees north of the equator.

Edited By not done it yet on 21/01/2021 14:27:43

Michael Gilligan21/01/2021 15:57:21
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Posted by not done it yet on 21/01/2021 14:26:35:

[…]

useless, as are suggestions that it is simply more than about 23 degrees north of the equator.

.

You are really on form, aren’t you !

I answered your specific question accurately, then included two riders by way of trying to help.

MichaelG.

secret

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