SteamyTea

It could only solve part of it. If we got rid of all domestic usage, we would save, nationally, about 30% of the primary energy usage. The big problem is insulating old buildings. We have seen what happens when the job is done badly, why we have forgotten about Grenfell, less than 5 years ago. To cover both energy security and meet CC obligations, we need to be electrifying as fast as we can. Anything else is just adding more sticky plasters.

I have some.

We are all that, and like to smirk at others when things go wrong. Back to your original idea, and maybe others can comment, how about sheathing any timber that is going to get wet often, or is partially buried, in GRP. Done properly, it will easily last 60 years. Done badly, a couple of weeks. Foamglass can be used to thermal structural elements as well, but not had any experience of it.

If Putin turns the tap of to the 'unfriendly' countries out bills will go down a lot. Have to get used to only having a few hours of power each day.

Uranium and Lithium. ProDave 0.37%, SteamyTea 0.63%, PeterW 0.4% and the winner, @joe90 0.74%

What they should look like.

What is the inside of your kettle like.

What a lot of letters.

This is giving away the secrets of successfully making composite plastic components. A combination of chemical changes that can cause uneven shrinkage, mechanical alignment that can warp components, making them seemingly 'grow' in place, evaporation that is uneven due to varying matrix thickness, or shape. Mismatch between the matrix components. The list goes on. As a mate of mine who worked for International Paints (industrial division) once said '(expletive deleted) I have it easy, just tell the (expletive deleted) to not put it on too thick, and no drips'.

Yes, the temperature range may be larger, but it still depends on the midpoint target temperature. So say you want to run the UFH at a mean of 30°C, with a variance of ±2°C. The buffet needs a lower band of greater than 32°C, with a higher band of less than 36°C to allow for mean full energy transfer. Water heating will need a higher overall temperature, and a much larger variation range to keep within the optimum 50% transfer window. Say 40°C to 55°C. The lower bound may seem lower than the desired DHW temperature, but it allows for efficient heating from below that temperature. Ideally the ∆T between flow and return will have a mean difference value of ±50% of the desired storage temperature, and very upwards as the store temperature increases. Plus a degree of two for losses

Shall we have a war of words with all the NIMBYs that have, over the last 25 years, stopped on shore RE development. We could be so far ahead now. But it seems we were at a relatively low level compared to out nearest and dearest. https://ec.europa.eu/eurostat/statistics-explained/index.php?title=Electricity_price_statistics Electricity prices (including taxes) for household consumers, first half 2021 </> EADEDKBEIEESITATPTLUCYFRCZFIELSKSIPLROLVLTEEHRNLMTBGHULINOISMETRRSEUBAMDGEXKUA(EUR per kWh)00.050.10.150.20.250.30.35 Sweden: data not available Kosovo: This designation is without prejudice to positions on status, and is in line with UNSCR 1244/1999 and the ICJ Opinion on the Kosovo Declaration of Independence. Source: Eurostat (online data codes: nrg_pc_204) This article highlights the development of electricity prices both for household and non-household consumers within the European Union (EU). When available, it also includes price data from Iceland, Liechtenstein, Norway, Montenegro, North Macedonia, Albania, Serbia, Turkey, Bosnia and Herzegovina, Kosovo*, Moldova, Georgia and Ukraine. The price of energy in the EU depends on a range of different supply and demand conditions, including the geopolitical situation, the national energy mix, import diversification, network costs, environmental protection costs, severe weather conditions, or levels of excise and taxation. Note that the prices presented in this article include taxes, levies and VAT for household consumers, but exclude refundable taxes and levies for non-household consumers. *This designation is without prejudice to positions on status, and is in line with UNSCR 1244/1999 and the ICJ Opinion on the Kosovo declaration of independence.

Can still get robbed though.

If the ΔT is too small, the HP will be running, along will all the circulation pumps/control gear, but little thermal power will come out the system. Think of it as a car idling outside a school. Generally, maximum power transfer is when you get half the energy out of something, it is why cooling curves are not straight lines. Takes two minutes to drop 50°C, then over 10 minutes to drop the next 50°C. So you may be running your complete system for hours, while it is only delivering a few watts. A buffer will allow you to set up the HP in its most efficient range, then switch off, then the heating circulation pump, which is not bothered by the temperatures involved, it just pumps, is controlled by the thermostat. Once the buffer drops to the lowest set temperature point, the HP starts up again, until it reaches the highest set point. So the buffer temperatures are what turns on the HP, not the room temperatures.

It is the same here under the MCS system. 99% of the time. All that means in reality, is those 3 or 4 days a year when it is extremely cold, your house drops down a couple of °C, no the system cutting out and refusing to do anything. My old house in Aylesbury, which was on gas, did the same one. Took me ages to realise it was just extremely cold outside.

@Nina F Can you send a link to the article you read please. As others have said, size it correctly and you will not have problems. At worse, a fan heater or two will get you out of short term trouble. When you say a well insulated house, do you know the target U-Values for each component, and remember the floor has to have a lot more than building regs as it is warmer than the house air temperature. When you build, airtightnes is important.

Depends on the flow rate and the temperature lift up from mains water temperature. 3 kWh seems high, but then a 10 minute shower seems long to me.

Are while building as most on here take several years. Should be cheap enough to knock up a very basic unit that can run off a battery.

First thing to do is to model your current hourly usage. Then you can see what can realistically be time shifted.

Coincides with times of peak load also. There can easily be a 2 fold difference is minimum and maximum grid load. Industry and commerce in general uses huge amounts of electricity.

Yes. I notice that at my Mother's house. Seems to be pulling ~250W constantly.

That would heat my house. Why is it so high?

White, educated, upper middle class lecturers. Context is removed to protect the guilty. As it is published knowledge I can mention one of the students. A rather gobby, late 20s, heroin addict. Like most heroin addicts she used methadone to top up her habit. She lived the usual squatters life, worked as a prostitute, and stole from all her friends. For some reason the senior course tutor convinced her she was Cambridge material and got herself on a Doctorate program. Then the trouble really started. She stole from her family until they were bankrupt and somehow ended up in jail for fraud. What made me smile was her attitude to others, she thought she was invincible. "Nothing you say can upset me". Bet the judge saying she is going to prison did.

It is how conspiracy theories start. People that truly believe that the earth is flat, or the moon landings never happened can happily be ignored as oddballs. But when that spills over into public policy, miss using scientific methods, it becomes very dangerous. Anti vaccination, climate change and war have the same casualties, the truth. I had the misfortune to lecture statistics to a group of second year social science students. That really highlighted the difference between them, and real science students. I should have realised because of their own personal backgrounds/histories i.e. drugs, child abuse, gambling etc, they saw the tails of a normal distribution as the important part, because it includes them. To them, the other 97.5% of the chart was an irrelevance.

I can see the ASHP helping to use up PV generation as that has displaced another energy source. Don't see how a battery makes a great deal of difference, unless you use a lot of energy during hours of darkness. Not as if modern lighting used much (though some in here seem to think they need a kW of LEDs to get them in the mood). A large TV with sound system may burn though a bit, but 8 kWh, probably not. Instantaneous electric showers may help, but even a 10 kW one is pretty pathetic compared to one run off a cylinder.

How I tell who is Emmet back home. They are the only ones that look proper relaxed in shorts.