What is the real LED energy efficiency?

[newshound]

All depends on how much you are prepared to pay. That's what people would have said about scrubbing sulphur from flue gas when I went to my first coal fired power station (55 years ago).

This is the flaw with the whole net zero business. The "insulate and give up beef" crowd can't or won't do the actual sums.

And we have people who really ought to know better saying "40% of UK energy comes from renewables", implying that it is not too much stretch to get to 100%.

And the "hydrogen from renewables" supporters who say all we need is better catalysts, forgetting that you still have to supply the energy.

[newshound]

One of my non-replaceable bulb ones as recommended by John Rumm not many years ago just went BANG this evening. Not bargain basement. Caused quite a voltage dip on the lighting circuit, but did not trip the 5A MCB. I think I have a spare, if only I can remember where I put it.

[Paul]

There were two articles about that here just in the last couple days.

One is the firm in Iceland, using basalt to entrain CO2. They have equipment in a demonstrator, that collects CO2 in "filter bags", the bags are heated after a time, to free the concentrated CO2, then the CO2+H20 are applied to basalt (volcanic rock, plentiful in Iceland).

The second article, claims we could collect CO2 from the air, by amending fields with basalt (presumably a fine layer on top of the soil). A second individual suggested charcoal could also be placed on the soil surface, with it. It wasn't clear exactly what the charcoal was supposed to be doing, because charcoal comes in a number of forms. Another individual was wondering what the heavy metal content of basalt is like.

At least the second scheme seems to be scalable without building a whole bunch of machines. I have no idea where the nearest basalt quarry here is located :-) I'm sure it's only a short drive to Iceland, to get some of theirs.

But those are examples of schemes using some geological materials. The machine with the filter bags, needs energy input for the process (it's not stated what is in the filter bags, whether it's a zeolite or something else). Whereas the idea of just throwing the basalt all over the place, you need transportation to get the basalt into action. The article suggested dropping it from an aircraft, which seemed particularly silly. Aircraft don't make for particularly effective earth movers.

Paul

[williamwright]

Plus all the illegals.

Bill

[The Natural Philosopher]

Using a metal oxide route to burn the coal results in pure CO2 in the exhaust.

C + FeO2=> Fe +CO2.

Then blow air through the molten iron...

O2 +Fe => FeO2

And recycle...

They are not intersted in Climate Change. They want a revolution that pits the 'intellectuals' in government and gets rid of democracy so the plebs are put in their place.

Of course whenever this happens, its the ruthless who end up in government, and they who are put in their place... gulags usually.

Plebs are useful. Insulate Britain are surplus to requirements.

A steam boiler and turbine is already 40% efficient. No great shakes to make ity 100% is it?

Well, exactly. Except they didn't forget. They never understood it in the first place.

There are two forces behind all this ecoBollocks

Cynical manipulators of public opinion for profit and political control, and useful idiots.

You don't really need to bother about the useful idiots. They truly are just the Bandar Log.

They are there to distract you from the real issue, which is you are being coerced into giving up wealth and freedom.

[Roland Perry]

In message <slm91u$15qc$ [e-mail]>, at 14:26:05 on Sun, 31 Oct

2021, Andrew snipped-for-privacy@mybt>> In message <sle08m$1ifq$ [e-mail]>, at 12:07:03 on Thu, 28 Oct

You could perhaps do a simple replacement of an earlier double-glazed unit, but that's rather ambitious for replacing an original window, let alone an original bay window.

[Andy Burns]

And presumably the capture process uses a sizeable fraction of the electricity you wanted to generate in the first place?

[Andy Burns]

New neighbours opposite have had (perfectly good, but brown) windows replaced recently, I was impressed by the efficiency of the fitter, who working alone, must have fitted windows at the rate of about one an hour ... maybe he was on piece rates and just liked to get home early?

[Jeff Layman]

Yes, it's remarkable how a pro can do things so quickly. OT for this thread, but several years ago we required a new fence. The guy worked on his own and dug 10 holes (in dry clay soil, somehow avoiding the roots of a 50' ash tree only a few feet away!), postcreted 10 concrete spurs in the holes, bolted 10 x 6 ft treated wooden posts to the spurs, and then fitted 10 6 x 6 ft fence panels to the posts, all in less than a day!

[Tim Streater]

Or 200%. May as well do the job properly.

[Clive Arthur]

Dig C up, burn in air, bury CO2. IOW, generate energy by burying Oxygen.

[newshound]

It always struck me that farming oysters would be a good way to sequester CO2, but I've never got around to doing the sums. IIRC the owner of one of the cockle bottlers on the Gower has a substantial driveway using cockle shells instead of gravel. I believe these have a proportion of calcium carbonate too.

[newshound]

Can't quite follow this point.

There is an aqueous amine route to capturing CO2 and recovering the amines, obviously it has an energy cost and also has the disadvantage of cooling the flue gas, so the chimney doesn't work well any more. But it is technically feasible on the necessary scale, not that I am advocating it.

I remember the mantra that we had 300 years of coal, but the oil would run out in the 1980's. I went into nuclear power because I figured that would easily let us keep cars, and given surplus energy we could synthesise fuel for trucks, planes and ships. I figured we would need coal as feed-stock for the plastics industry.

[Chris Hogg]

India has an estimated 200,000 cubic miles of basalt, after extensive vulcanism at one time thought to have caused the extinction of the dinosaurs. See

La Palma is producing some ATM!

[The Natural Philosopher]

The point is that the flue gases are *pure* CO2. So easy to capture.

The oxygen-less air is exhausted at a different place, without CO2 when the air is blasted through the molten iroin to make iron oxide.

Absolutely agree.

UK has no coal, but plenty left in USA, Oz, Poland, Africa...

[#Paul]

What, really?

#Paul