SteamyTea

We should make houses that are easy to pull down and recycle then. Technology may move on, a little bit (think how little it has changed in the last 40 years), but the Laws of Thermodynamics and Conservation of Energy will still be the same. We have a couple or 3 new members on here, how long before we have to tell them to build an airtight and, better than building regs, insulated home. And then explain that if a ground floor is heated, much more insulation is needed. Then how a heat pump works, and how PV roofs can be cheaper to install than fancy tiled ones. And my bug bear, fitting 40, 5 W, LED bulbs in a kitchen is not low energy. It is still like 2 old 100 W bulbs.

True. One of my old university flat mates threw himself of the cliffs, and another one drank himself to death, last year. Glad I moved, would have been my turn next I think.

I rubbed a bottle I found and a Genie came out and offered me 3 wishes. 1st wish: a penny more than I can spend; granted. 2nd wish: to build a 5 mile high wall around Wales; granted. 3rd wish: asked the genie if the wall was watertight, told yes. Fill it with water then.

Used to make air filters. The smaller the better as they cost pennies to make and it made the technology seem better.

And when I do my weekly drive by I don't notice it has gone. New houses there now I think. Did they ever find the body of the guy who got buried there?

No any of them live near an old nuclear power station, but don't work there. I was working up near Nottingham when they blew up the old power station cooling towers. No one missed them, but people did not mind then. They were just something that was there. But he only got about a third of voters on side and did not sway many of his party to support BREXIT. I think he is like Wedgy Benn. Stands up, says his well written and delivered piece, everyone nods, then forgets about it.

Only have to look on here for the range of answers.

In many ways, though a bit more costly, off shore is a good place for wind turbines. Probably why Vattenfall have an office in PZ. A few years ago, over at the other place, there was a hot debate about on shore wind turbines. Most agreed that they were acceptable 'in the right place', which was no where close to where they lived. The right place for on shore wind it on top hills, and then as large as possible. When I said that, it did not go down to well. Somehow I think that J R-M will do little damage, he is an irrelevance and most know it. Having said that like Boris in he past, he is entertaining.

I only need two. https://en.wikipedia.org/wiki/V_sign

No, we're in the nice bit of Cornwall. It's the sandstone filtering the water around here Don't filter out the Devon Farmer's nitrates too well.

Not for long with your water.

Electrification in the only generation that can be done cleanly. It does not have to be fossil fuel based. So which is easier. Insulating all 30 million properties to an average U-Value of 0.2 W.m-2.K Building another 10,000 5 MW wind turbines (about 200 GWh, or around 6.5 MWh per house). I idea of rebuilding is attractive, but not practical if you have to quickly house 5 million people. "Don't let the better be the enemy of the good"

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.