Re: Assumptions
Which one company is already doing...
5142 publicly visible posts • joined 19 May 2008
Ads should be a static image, that doesn't need six megabytes of javascript, and 14 more imported dependencies.
It doesn't require write access to my hard disk, nor read access to anything - it's a fscking image, it can be served up as one. That should reduce the cost to the advertisers by an order of magnitude.
And you target them as you always have - find an outlet that serves the audience you think will want your product, and pay them to display it.
>> "So that's ~1.1m/kWh"
>There's a big difference between the latent energy in a fuel and what you can realistically extract from it. A piston engine isn't all that efficient...
Indeed - such a difference that if we took the petrol, and burnt that in a power station... even at just 40% efficiency (typical for an oil fired plant), accounting for transmission and charging losses (0.4*.92*.9) we're at 33% efficiency, which is *still* better efficiency than burning the petrol in a car.
Of course we also just cut out a major distribution step in the petrol supply chain, and we wouldn't need to refine the fuel as heavily (saving a pile more energy), so the balance is actually even further in favour of the EV.
"the Citroen Ami. My neighbour has one, good enough to go to the shops but i'm not sure i'd be happy on a motorway in it."
They're not designed for, nor permitted on, motorways.
Would you feel comfortable using one as a submersible, or a space capsule? They're not designed for those uses either.
Taking a quick look at screwfix (other retailers exist) showers up to 11kW (10.8 at any rate) are quite common, most are over 8 - there were only 2 as low as 7.5kW
A typical EVSE at a home will top out at 7.4 kW, and will modulate the power which the vehicle is allowed to draw based on the grid load to the property - generally aiming to keep it below 60A (14kW).
To get to 11kW in EVSE world you need to be three phase - at which point you're well outside typical domestic usage.
I haven't come across a *rubber* plug for at least a decade (I still have a dual gang extension with moulded rubber sockets)
Granny chargers also don't do 13A for exactly this reason... 10A is the UK limit (though you can buy EVSE that don't respect that).
Or you can run the same off a commando socket - giving you 16A rated - all well below the typical 32A rating for a domestic ring main in the UK.
At 2kW you need ~2.5 hours between getting home at 6pm and leaving at 7am - so you could, if you were so minded, turn the wick right down, and draw ~500W for 12 hours - that's 6kWh - more than enough for the typical needs of a UK car.
2-3 times? Are you having a laugh?
9.5kWh/litre would be 40kWh/gallon - that is quite a bit higher than is usually quoted: 33kWh/gal petrol, 37 for diesel.
Average UK car does a shade under 40mpg (36 petrol, 43 diesel)
So that's ~1.1m/kWh
To be as low as twice as efficient you'd need be looking at a Vauxhall Vivaro, or an eVito, or an EQV300... all of which are vans, not cars.
Heck, even the ID Buzz gets over three.
If you're in a car and getting less than 3.5m/kWh then there is something seriously wrong - 4 is regularly acheivable, and many models will do 5.
I have a first gen MG ZS, and it's long term average is 3.7. It's an aerodynamic as a brick, and has nothing approaching thermal management of the battery - on a good run I'll have that giving me over 5, but it tends to be between 3.5 and 4.
Let's go the whole hog and account for 10% charging losses and 8% grid losses... that's 3 to 4 times as efficient as petrol.
Butwe really ought to be accounting for the energy used in drilling, transporting, refining, transporting, delivering... petrol/diesel... Frankly I can't be bothered to do the maths on those.
The vehicle was, as a quick check on the relevant government website will show, a pure diesel.
Had it been the hybrid version the battery would have been on the other side from where the fire clearly started (since we have video of it).
Of course the fire spread because when an ICE vehicle catches fire it leaks flammable liquids across the floor - an EV fire doesn't "leak" battery - hence the recent arson attack on a telsa dealership (I think) in Germany there were a few cars gutted, but they were right next to unaffected vehicles - Oh, and none of the batteries were burnt.
Primarily because the laptop sits on a pole mounted shelf (an old CRT TV wall mount) and I use an external keyboard/trackpad/mouse (yes, all three).
The only thing I use it for is the touch ID - and if that could be on the external keyboard that would suit me just fine (no I'm not buying a newer magic keyboard, my current keyboard works just fine)
> Facebook has no f**king idea about how to process personal information properly, and doesn't care.
I suspect they do have an idea, but that idea is fractionally less profitable.
How many EU users? 5 years of 4% turnover please - with a complete ban on operating until it's paid into escrow.
IF - they get a first launch today.
AND - it goes as planned
Then they can look at starting to trying to catch the boosters (since that's where the major expense is) and simultaneously put a couple of ships in orbit with the first tests of transfer.
The QD plate already exists, so the concept of refuelling isn't completely mad, but it is going to be some interesting engineering to keep the two ships attached whilst still (I assume) accelerating enough to settle the fluids into the pump intakes.
The biggest risk is still that a failed catch could cause some significant damage to stage zero...
2025 is certainly very ambitious, but if you don't set ambitious targets than they you aren't ever going to meet even reasonable targets.
(And no I don't think they'll be ready in 2025, but neither do I think that BO is likely to have all that much more than slide decks by then either.
Meta claim ~115 billion dollars of ad revenue.
They also claim 3.6 billion users.
So that's a relatively simple sum - Ad free should cost at *most* $32 a year, and since they don't have to store or serve those ads it should probably be less.
Either that or they will be losing $10/month - $120 a year and they've actually got less than a billion users, so they're lying to their customers.
"because IT COULD MAKE AND RECEIVE PHONE CALLS, something the android phone I moved from had difficulty doing some days. /sarcasm"
Well I swore of windows phones after my XDA mini - it would receive a call, the screen would light up and tell me who was calling, the ringer would start, and the vibrate alert started...
But they would just carry on - there was no ring ring, it was just riiiiiiiiiiiiiiiii..... and no Bzz Bzz, just Bzzzzzzzzzzzzz...
To stop this I had to drop the battery out and put it back in, then phone the person back.
It can't have been happening to all of them, but it was rather annoying.
"If the power density on the ground is significantly lower than that, the project doesn't make sense economically; just build solar panels, they won't make as much power, but they are cheaper and easier to maintain by, I dunno, two orders of magnitude."
Except that your new power density doesn't have down time each day (at least not significant downtime).
a PV farm using sunlight has, on average, 12 hours of daylight - and there is a significant bias towards the middle of the day even during that time. A space based array could have virtually no time in the shadow of the planet, and therefore have a much higher load cycle, requiring lower power density for the same overall generation.
I said - be *able* to, not have to.
There are places in the world where the meters are in a location which is pretty heavily shielded from any RF comms.
The ability to drop them onto a network would actually be useful, there is no need for them to have any access to your home network - they'd only need net access and that's why guest networks exist.
As for packet tampering - that's why they'd use a VPN, because then the tampering would be evident.
Getting a heat pump down to 1:1 would be a once in a "long time" event... and since even at that point you're no worse off than resistive heating...there is no benefit to relying on resistive heating.
Not that I won't have other sources of heat available... I have a gas boiler, I also have a storage heater in one room, as well as fan heaters stored in cupboards and an IR panel heater.
When I replace the gas boiler I expect that I shall only replace* the gas boiler with a heat pump - I don't expect the other heat sources to disappear.
* I'll need a hot water solution, since combi boilers were all the rage when I installed my boiler twenty years ago.
There are vanishingly few scenarios in which either EVs or heat pumps are not actually a substantial benefit.
Air travel and container ships are the main ones for EVs at the moment, with even road freight moving closer to electrification (either with new models or by retrofitting existing trucks).
Heat pumps won't do much for industrial processes requiring very high temperatures, but for anything "low grade" heat (like domestic heating/hot water) it's as close as we're likely to get to free energy.
> Please show your working on this....
> I've seen some modelling on this...
You need to do better than that, you need to show the modelling.
Because sea level rises are inevitable if we don't clean up our act, and fast.
Weather patterns are already changing, which will have significant impacts around the world.
If the loft has been converted, then you might be able to do something with the existing historical flues as part of the pre-20C fireplace network. Probably wouldn't be cheap but surely all the unit needs is access to external air rather than actually being physically outside on display to the world?
Yes - you can duct the air supply to a heat pump - though that's normally done for dedicated hot water heat pumps, which need to move substantially less air.
A chimney would be rather restrictive for a heat pump pumping out a handful of kW of heat.
So the size of the radiators is your biggest concern?
Well why did you put stupidly small ones in to start with?
The wall is already occupied with a rad, so you aren't losing more space.
Replacing microbore is a pain, but even 15mm pipe will carry just under 3kW at a dt of 5.
It needs to be done, microbore must be one of Crowley's inventions (Good Omens).
"Heat pumps are seen as some sort of magical solution however they are not."
Any sufficiently advanced technology is indistinguishable from magic.
Those of us who understand them know that they are an excellent part of the solution - those who don't believe we think they're magic.
>> need a coat of sealant
> Which would require planning permission, signing off and several £000's of bills.
Several grand for a coat of sealant? Look I've got this bridge to sell you.
Permissions is just something that can be changed... it's not actually a technical objection.
There are very good reasons why various bits of work (gas and electric) are required to be carried out or checked by a qualified person. And yes they can just be checked - wired up a loft conversion myself, and got it signed off. A competent and interested DIYer is likely to do just as good a job as a professional, but we aren't necessarily up to date with the latest regulations, nor do we have the tools to run all the tests which ensure our safety.
"You're rather missing the point. E7 uses dedicated spurs from the supply to the heaters, so there's no power to those spurs unless switched on by the remote control signal. "
I've only ever come across that on an E10 system, not E7 - and it doesn't need a rewire anyway - just a contactor switched by a timer.
"So if EV adoption increases, 'peak rate' will continue shifting into the evenings when both wind and solar typically generate less power.. "
No - the EVs will always charge at off peak. An average UK vehicle needs about 5kWh a day, that's peanuts, it really is. You can do that in less than an hour with a normal home charger, so there is no way in hell you'd do it during the evening peak. You plug in when you get home and then the car gets charged in time for the morning - but *not* at peak rate or time.
greenwashing is what you're doing to gas.
The weather is *always* good enough for a heat pump - you just have some grudge against the idea of preserving the planet in a state where we can carry on living.
This concept that heat pumps don't work when it's cold is only slightly less intelligent than flat earth...
Local control is an upgrade - because it *is* consumer control. The meters aren't what gives the control, but they allow for dynamic pricing - and that encourages consumer control (whether individual or using other services).
EVs, or their chargers, can time their usage, you can set the timer on your immersion heater, my storage heater is on a timer.
There are some "electron retailer" controlled devices - the Ohme EV chargers can be controlled by Octopus - and *all* the electricity you use whilst that happens is charged at off peak - that's far better than a radio clock signal - for both the consumer and the electricity retailer. You just set how much electricity you want by when, and it happens.
There are also other systems with external control - Mixergy tanks will stop heating at times of peak grid load, they'll still heat if they *need* to, but they'll delay if they can.
For all the "end up costing consumers more" bollocks you spout I pay far below the 27p you claim for electricity - it's been 9.5p over the last year. Gas over a similar timescale (309 days) has cost me 10.9p. Interestingly I've used similar amounts of each this year so far (8.3kWh electricity, 7.4kWh for gas) but I expect gas to overtake electricity as the year finishes off with colder weather, and since the price has recently dropped, and I expect higher usage, the overall cost of gas will drop somewhat. However since the price of electricity has also recently dropped, and the value of exported electricity has increased - that value is unlikely to rise much, despite the lower insolation as the year ends.
Yes - Vimes Boots - I appreciate that I was able to put some more environmentally friendly technologies in place last year, and I expect to continue doing that (when my current boiler fails for instance).
"Resistive heating is also 'un-green'."
Resistive heating is 100% efficient, which is substantially better than gas, but *way* worse than a heat pump.
"Plus in our infinite wisdom, the extremely simple radio signal that controls the meter is due to be turned off soon. And we've 'invested' billions in 'smart meters' that can't do the same thing."
Except that what we've done is move the logic. My storage heaters were never controlled by a radio signal, only by the clock on the meters - what I have now is a simple timer.
Turning on/off immersion heaters across the whole country at the same time is daft anyway.
The local control, which is actually better now that we have smart meters and other associated options, is an upgrade - not the downgrade you consider it to be.
If heat is "wasted" into a home *in winter* then it isn't wasted... it certainly is in summer, and might actually increase the cost of cooling (whether active AC or just fan based).
Distributed storage is, of course, less profitable than concentrated storage - that's why we don't see hundreds of tiny coal power plants in people's sheds - the economies of scale are obvious.
However home storage is still a valuable technology, with or without solar.
"Nope, i'm saying heat pumps are an economic insanity"
Well then you're spouting more crap than the back end of a bull with diarrhoea.
"outright requirements to do things we don't want people to do should be modified forthwith"
You mean like lying about how fossil fuels are brilliant and cheap and have no drawbacks, but electrons are the work of the devil?
Or do you mean that we should allow people to drive at 90mph through town as school ends because "they want to"?
Perverse incentives exist - and do need to be mitigated. For instance there is no way coal should ever be cheaper than gas, and gas prices shouldn't be subsidised by clean energy generators.
There should be an outright ban on hooking up new builds to gas - because better solutions exist - both individually and societally. But no - we can't do that because someone's ancient house might need a coat of sealant on the old chimney.
Ah yes - the conservation area friendly bright yellow paint.
See - the area is already changing... and will continue to do so. An unobtrusively located ASHP isn't going to cause the ground to swallow up the area in disgust.
Ah yes - the "but I can't afford something that will save me money"
I am well aware of vimes' boots. That's why grants for such things exist - because it's actually a societal benefit having them installed. As more are installed the price then comes down, and more people are trained in how to install them so the availability and price comes down further. For some reason our electrical consumption attracts ~12% "green levy" compared with ~3.4% for our gas consumption - despite about 40% of our electricity coming from renewable sources, and some from nuclear.
Imagine requiring people to spend much of their income of device to allow them to continue travelling...
The starting position should have been (ten years ago) to ban gas in new builds... Then to look at replacing failing "old" boilers, then more modern boilers as they age and fail... There simply isn't the capacity, the will, or the benefit to suggest that all boilers should be immediately ripped out and replaced with heat pumps.
I am very well aware that there will be people who aren't in a position to install a heat pump at the moment... many of those people should, at the time their existing boiler fails, have the equipment installed by their landlord (some proportion of which will be the council), rather than out of their own pocket.
In the same way in the early days of cars, telephones, televisions, mobile phones, computers.... any of the things you now think of as ubiquitous parts of society - they weren't immediately accessible to everyone. Why do you insist that heat pumps buck that trend?