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Comment Re:Question is, the value of wind generated power (Score 0) 192

This post is not flamebait. Its sincerely held rational opinions based on the facts of the UK experience, backed up by the data readily available from gridwatch or gridwatch.templar, I understand that people would like desperately for wind to be a viable technology for industrial societies, but the verdict is coming in from the gigantic experiment, and it just isn't.

What dooms it is intermittency. Well, and high costs too.

Just look at the results of the latest UK wind auctions, and look at the estimates for building transmission capacity from the north coast of Scotland (where the turbines are) to the Midlands and South where demand is. Look at constraint payments. Look at gridwatch to see what all this is delivering. Read the Royal Society report to see what the best UK minds can come up with regarding storage.

It isn't working and it isn't going to work. Folks, you need to get out of denial and look at the facts of experience!

Comment Re:Question is, the value of wind generated power (Score 0) 192

If they are trying to run the country on wind and solar, then on a winter evening when there is the usual blocking high and wind calm, and no solar generation, your UK friends will be trying to supply 45GW (or north of 60GW if they manage to convert everyone to EVs and heat pumps) while having only about 10GW generation. Assuming they manage to get around 100GW of wind installed, which is a real question also.

Don't believe me? Look at gridwatch. Lows from 30GW face plate wind can go as low as 0.5GW. Can be below 5GW for a week or ten days at a time.

And this is going to continue for a week or ten days, as it does almost every winter.

By day two they will not be discussing the difference between stocks and flows. They'll be discussing

Comment Re:Question is, the value of wind generated power (Score 0) 192

"CCGT capacity in the UK is sufficient to cover the rare times when there is zero wind."

No, it isn't. Just look at gridwatch. zero wind (or close to zero) is not a rare occurrence at all.

As to enough gas, the UK has about 30-35GW of gas depending exactly how you count. Peak UK demand is around 45GW.

The UK has twice this year been on the verge of blackouts. The last one, in June, it escaped by the skin of its teeth by importing on an urgent basis from France.

Need to read the UK news. Its impossible to run a country on intermittent generation technology. Its especially impossible to do so while raising demand by moving transport and heating to electricity, and while making no or inadequate provision to cover intermittency.

Comment Question is, the value of wind generated power (Score -1, Flamebait) 192

The question is, what is the value of wind generated power?

The UK has real time and archived data available to anyone who really wants to answer this question. The data shows, in summary, that wind generated power is not the same as conventional or nuclear generated power. You can see it clearly here in graphical form ( and from other sources, (www.gridwatch.templar.co.uk for instance) there's the raw data available in csv format. Here's the graphical version:

www.gridwatch.co.uk/wind

What happens is that much of the time peak wind generation coincides with low demand. This leads to constraint payments, when operators are paid as if they were generating but have to turn off supply. Then, there are regular calms, several a year, lasting a week or so, when peak demand coincides with low generation. When this happens gas has to be turned up to cover. The effect of these two factors is to lower capacity factor. It doesn't appear in the usual accounts of this, and it is never reckoned with in LCOE (Levelized Cost of Energy) calculations. LCOE is basically accounting fraud, comparable to stuffing the channel in manufacturing. It assumes that all power generated across the life of an installation is of equal value, but it is not.

How low is low generation? As you can see from gridwatch, 30GW faceplate of wind can fall well below 1GW for quite long periods.

This is not primarily about climate. Whether you think there is a climate crisis or not, the problem is that this is not a technology that is fit for the purpose of supplying a reliable electricity system to a modern industrial economy. The problem is there is no cost effective way of dealing with intermittency. In fact, without having total backup for the wind, there is no way at all.

The way to think about this is that what is being done with wind at the moment is not a transition. What is really happening is that a functioning conventional or nuclear system is required to pretty much fully cover peak demand. The buildout of wind is basically supplementing it. The case, if there is one, for doing this is not that a cheaper method of generation will replace conventional. Its that when the wind works and coincides with demand it can reduce fuel consumption of the primary generation network.

A further problem which the UK is experiencing is that wind power locations are far removed from demand centers. So they are having to build at great expense large transmission facilities from the north coast of Scotland - for which there is no other reason than the fact that wind farms have been built there.

Does it in fact do this? Is it cost effective to build (in the case of the UK) all those turbines off the north coast of Scotland, and all that transmission to get the power down to the Midlands and South, in order to save some fuel on your main conventional network?

I have seen it claimed, but have never seen any fully costed case showing that it is. And the fuel savings themselves? Maybe a lot less than you would expect, because to accommodate the wind power fluctuations you have to have rapid start gas, which is very fuel inefficient.

Some reading this will say 'batteries'. The Royal Society considered this, and dismissed it as absurdly expensive. It was so expensive and impractical that they thought a better solution would be to excavate and seal vast caverns and fill them with stored hydrogen. They did not specify where this was to come from. The fact that they thought this a more practical solution speaks volumes about the scale of the problem. The report goes into the question of intermittency in some depth, and draws attention of the observational fact that whole seasons can be low wind.

https://royalsociety.org/-/med...

What happens if you close your eyes and go ahead anyway with trying to transition to wind? The UK is finding out. Its had two cases this year of approaching large scale blackouts because of insufficient reserve to cover fluctuations. So far its been lucky, and there is some evidence that the narrowness of the escape was covered up. But the smart money is that one of these winters luck will run out, and they will then have to cold star at scalet and, if they have had to retire their gas by then, insufficient spinning reserve. And no, you will not get spinning reserve over the Euro interconnects, they don't do that.

There may be alternative technologies which will generate the levels of reliable power our economies need. But wind is not one of them. So on the whole the Administration is right. Its expensive to cancel it, but its a lot cheaper than going ahead with it. The UK is an early warning system. Its the canary. Or if you like, its like a bystander watching the lemmings and figuring out he does not want to join in this particular rush.

Comment Re:Verification (Score 1) 165

A classic example of current cultural pessimism.

The present administration is said to be doing something dire - "The alleged administration never saw a math problem it could understand and has been busy cutting research funding that doesn't directly contribute to producing widgets for its industry friends."

But no numbers are shown to support this. Then there are the '"beancounters" - obviously a derogatory term, presumably for accountants, and they are supposed to be saying something completely stupid, and the sort of thing that accountants in real life never say, and if they were to, no-one would listen.

We actually need accountants. Without accountancy we would find it impossible to run a money based economy. You may not like what proper accountancy shows about a given project to which you are emotionally attached - that's one usual reason for a generalized resentment of accountants. But with all the imperfections of the profession, we need it and its a positive force.

And finally you arrive at the dire predictions which don't follow from your arguments, the attribution of racist denigration of mathematics. How you dragged racism into it? The US is going to run desperately short of mathematicians due to its approach to AI. OK, but how on earth are you to bring race into this? By arguing that the Chinese are visibly doing AI better, and that the only reason the US does not imitate them is racism about them. Oh, so its not the bean counters and the alleged administration at all - or maybe it is, but they are all motivated by racism. Or maybe its the administration that is racist too?

Its all completely incoherent, but its worth dwelling on for a few moments to see a pattern of doom laded resentment, with dire predictions associated, and no solutions, which occurs in the other great progressive issues of the day. Gender, climate/energy, race, periodically even diet, where we switch from demonizing fat to carbs to protein and back every few years.

No, there is not going to be an apocalyptic shortage of mathematicians due to the US approach to AI by this administration. There are lots of ways in which education for employment, and education in general for life, can be improved, not least by changing the attitude and objectives of the teaching profession. But we are not going to run out of mathematicians.

One can make similar points about the other great progressive issues of the day, but this is long enough and contentious enough already, so I'll leave it with that cryptic observation!

Comment Seems like great hardware (Score 2) 165

The laptop line seems to have great hardware, and I would buy it in a flash, except that I don't want what I see as an awful OS - not so much the OS itself, but the restrictions and app choices it ties you into. I know Apple enthusiasts see this differently, but I just don't understand their enthusiasm for the company.

Don't much like Windows either as OS, but sometimes for some purposes you need it, and it runs very nicely in a VM for those occasiona, and otherwise keeps out of the way.

When they let you run Linux on an Apple machine in the same way you can load Debian or whatever onto an HP or Dell, I'll buy, but the whole spirit of the company is antithetical to that -- which is why I'll never buy one as things are, and they are not going to change.

Pity about the hardware, but there you go. Some compromises are just not worth it, and they want and always have wanted too much. Whether its as in the past buying inferior hardware to get an OS you wanted, or as now, buying an OS you don't want in order to get desirable hardware, the price is always too high and the compromise too great..

Comment Re:Media literacy would be better (Score 1) 134

"the difference between a story originating from the Guardian or some Russian bot-farm..." But how much difference is there? The Guardian is just a bot farm staffed by humans following a party line. Or they have been humans, though increasingly it seems like they too may be largely bots.

Yes, this is what the government has in mind. The Guardian, BBC and other certified righteous outfits would have to come at the top of searches. Other misinforming broadcasters like GBNews would come at the bottom with the Russian bot farms or not appear at all.

The faked news clips of Trump that the BBC broadcast would be at the top of the searches, and the stories that GBNews carries pointing out how they were faked would not feature at all.

This would be 'Verified Live', and challenging it would be misinformation. It would be sort of like the gender mafia at the BBC, but on a national scale.

And as a late great anti-psych writer once wrote: if you cannot talk about it, you cannot talk about the fact that you cannot talk about it. VPNs would be next, and pretty soon after that it would not be permitted to mention that there are such things. The Great Wall of Britain, Chinese media control with British characteristics. To protect people, or course.

Comment Re:Reminder that the BBC is funded with coercesion (Score 1) 134

The license fee is taxation tied to supporting one particular broadcaster. Its a government imposed tax on watching live TV from any broadcaster.

If you want an analogy from the cases you cite, it would be if you had to pay a tax on every newspaper purchase, whose proceeds were handed on to the Guardian. And if it were a criminal offence to read any newspaper without paying this tax. Go into a library, and you cannot read the papers without producing a paid permit. Go into a newsagent, and you cannot buy a paper without producing it.

Or it would be like a tax on shopping at any supermarket, whose proceeds went to Tesco. You would have to have a paid supermarket permit to allow you to shop at, for instance, Sainsburys or any other supermarket, and the proceeds would be given to Tesco, and it would be a criminal offence to shop at any supermarket without buying such a permit.

Or, put it another way, you would have to have a paid permit to drive a car, any car. The proceeds would be paid to Ford.

Still strikes you as reasonable? Still think its good value? For who is it good value? Its good value for all the people who like the BBC and would subscribe to it were subscription voluntary. Its good value because the other half of the country, or maybe more, are subsidizing them.

Its the great liberal tradition. Get something we want, then make everyone else pay for it whether they want it or not, call it 'public service xyz', then claim its great value. Because the fee, paid by everyone including all those who do not want or use it, is lower than the fee for, for instance, Sky. Which is only paid by those who want to watch it. So no wonder its cheaper.

Its like if beer from one brewer, every pint, half the cost was paid out of taxation, and they all go around saying what great cheap beer this is. Yes, because the whole country is paying half on every pint drawn, whether they drink it or not.

And then, immune from commercial pressures, the BBC goes around unaccountable and systematically making up fake news, and there is nothing you can do about it, if you want to watch any kind of live TV at all.

A garbage system. No wonder the French have dropped it.

Comment Re:Just to clarify one point (Score 1) 214

That this vomit posing as a rational comment is moderated as "Interesting" just confirms that I made the right decision to abandon slashdot several years ago now. I occasionally drop in to see if anything has changed for the better, but so far, no, it has not.

There is nothing interesting about the parent whatsoever. It's not even very original, just the same old groupthink.

Comment Re:More power for my AI overlord (Score 2, Interesting) 101

its a noble effort, but you are posting to an environment where everyone here knows that wind+solar+batteries is cheaper than gas or coal, because the wind and the sun are free, and they have no fuel costs. They also know that the only people who are skeptical about this are climate deniers.

These deniers keep talking about something called Net Present Value and claiming that is the correct way to evaluate and compare costs of generating systems. Net Present Value is a concept you will find in all kinds of Corporate Finance textbooks, well, do I need to say more? Its hetero-normative, racist, patriarchal and neo-colonial, and probably Islamophobic and transphobic with it and denies indigenous wisdom. Its on the wrong side of history, like coal, gas and nukes. Of course it pretends that wind+solar+batteries is actually a very expensive technology.

Well it would, wouldn't it?

Comment Don't see the problem (Score 1) 32

What's the problem?

All they have to do is build more wind and solar (and batteries). Everyone except a few climate denialists knows that wind+solar+batteries is far cheaper than coal, gas or nuclear and can generate all the electricity anyone could conceivably need from free fuel, the sun and the air.

There is absolutely no need to restrict the installation of data centers, and there is no reason whatever why their power demands should raise prices. In fact, they should lower prices, because they will be at the spearhead of the energy transition, because it will lead to a larger and larger proportion of generation moving away from legacy technology to cheap clean power.

This is so obvious to us all here on Slashdot that its a mystery why the local politicians don't see it too.

Comment But can you still buy AZW books? (Score 1) 42

AI claims that you can still buy AZW books and read them on one of these old Kindles. The claim is that if you buy from your PC account for the old Kindle it will be supplied as AZW, which will be readable on the device after transfer to it from the PC by USB.

The claim is that what has changed is that you can no longer buy directly from the Kindle, because purchases are now KFX only. But that you can still buy books for it over the web using your PC and they will be supplied as AZW.

If this is really true, the change is not only not a bad thing, its positively a good thing, because the account details on the old Kindles were stored very insecurely so it was a real security hazard wandering around with this very stealable device with all your Amazon credentials stored in open format.

Is it true? It was true before the latest change, but is it still?

Submission + - SpaceX unveils sweeping Starship V3 upgrades ahead of May 19 launch (teslarati.com)

schwit1 writes: Here is an explicit, broken-down list of the key changes, first starting with the changes to Super Heavy V3:
  • Grid Fin Redesign: Reduced from four fins to three. Each fin is now 50% larger and stronger, repositioned for better catching and lifting performance. Fins are lowered on the booster to reduce heat exposure during hot staging, with hardware moved inside the fuel tank for protection.
  • Integrated Hot Staging: Eliminates the old disposable interstage shield. The booster dome is now directly exposed to upper-stage engine ignition, protected by tank pressure and steel shielding. Interstage actuators retract after separation.
  • New Fuel Transfer System: Massive redesign of the fuel transfer tube—roughly the size of a Falcon 9 first stage—enables simultaneous startup of all 33 Raptors for faster, more reliable flip maneuvers.
  • Engine Bay/Thermal Protection: Engine shrouds removed entirely; new shielding added between engines. Propulsion and avionics are more tightly integrated. CO? fire suppression system deleted for a simpler, lighter aft section.
  • Propellant Loading Improvements: Switched from one quick disconnect to two separate systems for added redundancy and reduced pad complexity.

Next, we have the changes to Starship V3:

  • Completely Redesigned Propulsion System: Clean-sheet redesign supports new Raptor startup, larger propellant volume, and an improved reaction control system while reducing trapped or leaked propellant risk.
  • Aft Section Simplification: Fluid and electrical systems rerouted; engine shrouds and large aft cavity deleted.
  • Flap Actuation Upgrade: Changed from two actuators per flap to one actuator with three motors for better redundancy, mass efficiency, and lower cost.
  • Faster Starlink Deployment: Upgraded PEZ dispenser enables quicker satellite release.
  • Long-Duration Spaceflight Capability: New systems for long orbital coasts, orbital refueling, cryogenic fluid management, vacuum-insulated header tanks, and high-voltage cryogenic recirculation.
  • Ship-to-Ship Docking + Refueling: Four docking drogues and dedicated propellant transfer connections added to support in-space refueling architecture.
  • Avionics Upgrades: 60 custom avionics units with integrated batteries, inverters, and high-voltage systems (9 MW peak power). New multi-sensor navigation for precision autonomous flight. RF sensors measure propellant in microgravity. ~50 onboard camera views and 480 Mbps Starlink connectivity for low-latency communications.

Believe it or not, there's more.

Two years ago, the biggest and most powerful rocket ever flown was Starship V1. Last year, it was Starship V2. V3 is about to become the biggest and most powerful rocket ever flown — but don't worry, the company already has plans for V4.

Submission + - A completely unfair, subjective take on the latest laptops 1

davide marney writes: I am in the market for a replacement laptop. I need a snappy machine with a high-resolution screen because I do a lot of detailed work. Off I go to the nearest box store. After testing a baker's dozen Windows, Chromebook, and Apple laptops, here is my purely subjective take on how they compare:

All the Windows laptops have invested in adding AI features at the expense of hardware. I found only two machines that I would call snappy and with a high-resolution screen. The price floor for this level of hardware was $3,200. Every single laptop below that level was sluggish. We all know how Windows performance sags with age. If they're this slow brand new ... ?

All the Chromebooks were pitifully underpowered. While I admire ChromeOS for its efficiency, simplicity and no-maintenance ethos, an embarrassingly underpowered CPU is a guaranteed poor experience. What are these vendors thinking? The entire lineup is aimed straight at the bottom of the price pile. But so what if they cost just $350? Bad is still bad at any price.

Apple, thankfully, is generations ahead of everyone else in hardware. Even the most base of base models is snappy and has an excellent, finely-detailed display. My pick was the M5 Air 15-inch, a delightful machine to use. The price is $1,300, less than HALF the equivalent Windows laptop experience-wise. The world has turned upside down.

Submission + - Vladimir Putin is now afraid (telegraph.co.uk)

fjo3 writes: The scaling down of the May 9 Victory Day parade in Red Square is extraordinary, so much so that it demands serious attention. What was once a massive display of military power now appears reduced to something closer to a token event.

This, remember, is meant to honour the sacrifice of some 26 million Russians during what they call the Great Patriotic War, known elsewhere as the Second World War. To cut it back so dramatically – reportedly due to an inability to defend Moscow from Ukrainian attack – is not just embarrassing; it is strategically revealing. For Vladimir Putin, it raises uncomfortable questions.

This is, in part, because when Putin reintroduced military hardware to the parade in 2008, he framed it as a clear signal of strength: a warning to adversaries that Russia could defend itself. He was explicit: this was not sabre-rattling, but proof of growing capability. That claim now rings hollow.

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