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SteamyTea

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Everything posted by SteamyTea

  1. Even easier would be a standard control system. Similar to car pedals. It is really for the manufacturers to make a common standard, and stick to it.
  2. How much room do you have to play with? Mineral wool, blown cellulose or even poured polystyrene beads would all work well.
  3. Here is some time series data from my E7 heated cylinder.
  4. TL;DR Architects will do anything for payment. Well I say anything, maybe less than you expect, then hide behind their professional organisation terms of contract. But look on the bright side, they will still charge you the same for half the job, so you know were you stand.
  5. Have a look around the base of the cylinder and see if it has a boss blanked off. You could try setting the thermostat to the maximum it will reliably go to i.e. 85°C. Tat will at least allow more cold to be mixed with it at the tap. You can also time your usage to allow a decent recharge time that coincided with PV production, i.e. use before 10AM, usage after 2PM. Use less.
  6. Why would anyone pay for a tree. Just dig up one the council has recently planted. What we pay our rates for isn't it. Can also pick up a nice, sturdy bench seat.
  7. I was asked the best time to plant a tree. "20 years ago. If you didn't, then today" PV is the same.
  8. Aim for zero waste. Bins become redundant then.
  9. Any use https://sealsdirect.co.uk/
  10. I think I read that article 15 years ago. Don't hold your breath. Have you compared the price of roof integrated PV compared to tiling/slating. Bear in mind that you will have scaffolding up anyway.
  11. I clicked on your link and it took me to this: But not having a unit, or account, can't go any further.
  12. One of the problems the public have is caused by governments hanging their tune. "Greenest government ever" "Get rid of this green crap" Same bloke said it. So if a government says something will be done, or something must never happen again, we all know to ignore it.
  13. MI, manufacturers instructions. Or, as @pocster thinks, meat injection.
  14. BEV is battery electric vehicle. PHEV is plug in hybrid electric vehicle. DI is direct injection, though not used much, most large diesels are DI. HFC is hydrogen fuel cell, better known as fool sells. There are too many of these and sometimes they change meaning. ABS is anti lock breaking system, or the plastic the bumper is made from.
  15. Well as it is the PU breaking down/softening you may be better off just putting a bit of woolen blanket or rubber around them. 5mm of that, then foam. Try one and see how you get on.
  16. I used similar when I silconed my units in. Not sure it was really necessary though. Better than having to buy another unit though. The one thing I did wrong one time was not checking that an opening frame was square. It still snags a little. I just don't open that window much.
  17. Mine is the same. One word out of place and she is like a fridge.
  18. Take lots of pictures and videos, especially how you got around problems. Then ask to set up a blog.
  19. My experience with polyurethane foams and high temperatures is that over time the foam breaks down.
  20. Made her smile, for weeks.
  21. Answered that above. How long did it take to get the UK, as a whole, electrified and on the NG grid? It did not happen in a decade. Some numbers. https://en.wikipedia.org/wiki/Renewable_energy_in_the_United_Kingdom Is your current car as old as your old house? My old 2 bed house in Hertfordshire (1910 vintage), which was a similar size to my current place (had a much larger garden) used about 20,000 kWh of gas a year. When I moved here (198 vintage), my first year's usage was 11,000 kWh/year. Half what I was using up country. A very few minor tweaks to the fabric and much more analysis has got me down to 3,000 kWh/year. I also had a small Vauxhall Corsa, 1.2 automatic (1997) that did under 30 MPG running around and about 40 MPG on the journeys down here. My current 2007, much larger and heaver, but more comfortable and much nicer to drive, Ford C-Max does 55 MPG running around and 65 MPG on my trips up country. So vehicle technology has moved on, but not as fast has houses have in recent years. As for the NG not being able to cope with EVs. I looked at this a while back 2018, which is now five years ago. HOW MANY ELECTRIC CARS CAN WE CHARGE UP TODAY? Is there enough energy whizzing down the wires. I have heard people talk about the infrastructure needed to run electric vehicles, it usually centres around fast charging and the lack of places that they exist. This article will delve a little into this complicated topic and shed some light onto the problems. As in my other pieces on electric vehicles, I use a cartoon car that does 1 2,000 miles a year and uses, after losses, 220 Wh/mile. Now I know that some people will claim that this is unrealistic as a Tesla S uses around 350 Wh/mile. But the thing is, most of us that may change to an electric vehicle in the next decade, will not be driving a large, fast luxury car, we will be driving a small Renault or Nissan, or maybe even a Geely. Anyway, you are welcome to debunk my assumptions, as long as you show me your working. So my cartoon car uses, on average, 7 kWh a day of electricity. This is not a great deal in the scheme of things when you compare it to our national usage of 808,704,000 kWh/day. The problem is that we cannot deliver all that energy in one go for a number of reasons. If everyone was to get home at 5 PM, plug in their EVs and ick the switch, most of the country would be plunged into darkness. Well it might not really. What happens at the moment is there is a bunch of clever people who control our electricity generation and distribution, within very tight limits. This is the job of the National Grid. It does it extremely well and, in my opinion, very cheaply. What basically happens is that the National Grid knows, from historic records, what the most likely demand is going to be, they then schedule a combination of different power stations to start and stop delivering power. So when we are all asleep, there is little power being generated, when we get up, at around 7 AM, they switch on more power stations to meet the demand. At 5 PM, which is historically the time time of largest demand, they have everything going, plus a few ready to go in case of problems like breakdowns. Then at about 9 PM, they start winding down generation, as we all start going to bed. During the night, there are only a few nuclear, gas plants and wind turbines going. So if we did all get home at 5 PM and expect out cars to be charged, it would happen. The cost would be high though as we would need to put more generation capacity to work, plus some new ones, just to charge our cars up. The thing is, we don’t, at the moment, all have EVs. Very few of us do. So rather than work on what can be done today, I decided to look at what could have be done, without changing the amount of electrical generation we already have. To do this I simply looked at the maximum demand on any day. Knowing this is an achievable amount, as we have already done it, I then looked at how much spare capacity there was the rest of the day. After analysing every hour of generation from the beginning of 201 2 to the end of 201 8, establishing the maximum demands, I then took away the maximum demand of the remaining hours of the day. This gave me a conservative estimate of what can be reliably and relatively cheaply delivered. Then I had to look at the practicalities of charging EVs. Most of us don’t drive very much. Our cars are parked up, usually by our houses for most of the time. I know there are some people that drive tens of thousands of mile a year, I used to be one. But this is not the market for EVs, they will buy combustion engined vehicles for the foreseeable future. Accepting that our cars have plenty of time to be charged up, usually over night, I calculated that you need 3 hours to charge the cartoon car with the 7 kWh that is needed a day. This can be done from a normal 1 3 Amp, 230V electrical outlet (they can only deliver a constant 1 0 amps). Because of this, no new infrastructure is needed for most people. Now I know that if you live in a flat, in the centre of a large city, you cannot park your car next to the top floor window. But you probably don’t have a car if you live in a city centre. I cannot account for all vehicle owners. Most of use can park pretty close to an electrical outlet, and anyway, as you shall see later, we cannot run every vehicle on electricity. Now, if you do accept that most people could charge a car up at night, we can look at doing that. Luckily we already have some good information about electrical energy usage at night. We call this Economy 7, and it is what heats water and homes for about 7% of the UK's population. 7% is about 2,000,000 homes. What happens with E7 is that at midnight, every day, a radio signal is sent out that flicks a switch in the electrical meter to tell it to charge less, around 9p/kWh. Then at 7 AM, another signal is sent out to reset the meter to day rate and the charge goes up to around 20p/kWh. Normal electricity is about 1 6p/kWh. The idea is that when there is spare capacity at night, it is better to sell it on cheap than turn the power station off, and then on again in the morning. If you are canny like me, you can get your usage to 90% on the night rate, at 9p/kWh, and only a tiny bit at the high day rate. This is great for charging up an EV, except if too many people tried to charge up cars, water and their homes, there may not be enough generation. This would mean that more needs to be brought on line. This costs more and the price advantage would vanish. But luckily, most homes only need about 3 to 4 hours of E7 period, and most usage happens in the first hours after midnight, not the last. This means that car charging could be delayed till the last 3 or 4 hours. All that is needed is a secondary timer switch on the extension lead, or if we want to get clever, a time delay of 3 hours after the midnight radio signal. This gives us a window of around 4 hours to charge up our electric cars at home, plenty of time to pump in the average 7 kWh needed. I have decided to call this period, within the E7 timings, E4. One other thing I did was to make sure that there was no more than one day a year that was unable to supply enough power. This has made for an interesting quirk. As our demand for electricity has declined in the last few year, mainly because of energy efficiency measures and warmer weather, even allowing for the unseasonally cold weather in 201 7, my methodology shows a decline in spare capacity. This is really a quirk in analysis and not a fundamental problem in electricity supply. It would be fairly easy for the UK to add extra supply from the existing capacity by just running some gas powered power plants for longer or reconnecting windturbines that have been disconnected for balancing reasons. Explaining balancing would take a much longer article than this, but just remember too much generation is a problem, it pushes the voltage and frequency up, something we don’t want to do. So how many cars could we have connected, on average, to our existing electrical system over the last seven years. There are three answers to this, the first is the minimum, using the E4 time window and comes out at 3.1 6 million cars. The second figure is for the full E7 time window and is 5.32 million cars. Finally, if we can charge all day, anytime we like, then we can connect up 9.29 million cars. As we have about 200,000 EVs registered in the UK, hopefully this article shows that for the next few years we do not have a problem charging them, and we can, if we wish, charge them up at 0.45p/mile. Worth considering and remembering that if someone says we do not have the capacity to charge up electric cars, they are talking bollocks.
  22. Milli Hertz ?
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