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Posts
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Everything posted by SteamyTea
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Identify the Swedish screw (and where can I source it?)
SteamyTea replied to oranjeboom's topic in General Joinery
Nut Washers and Bolts Eats Shoots and Leaves Tits like coconuts No help in getting the right bit, but the shops are shut now. -
Two bits of news on the US electricity market
SteamyTea replied to Alan Ambrose's topic in Housing Politics
Nor do they fit 3/4/5G masts on the Lizard, the home of radio communications. -
Two bits of news on the US electricity market
SteamyTea replied to Alan Ambrose's topic in Housing Politics
Not Porthcurnow then, the data hub of the world -
24v lighting circuit - good or bad idea?
SteamyTea replied to SBMS's topic in Networks, AV, Security & Automation
I have never gone to bed with an ugly woman, but have woken up with plenty. -
I posted it up on here, think it was on here. Somewhere there is a small videos.
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Identify the Swedish screw (and where can I source it?)
SteamyTea replied to oranjeboom's topic in General Joinery
It is a bolt, not a screw. -
I made my own secondary glazing. Was easy and cheap to do. Could make it 'posher' for not much more.
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Kingston Efficient Homes Show 2025 Short Talks
SteamyTea replied to DamonHD's topic in Boffin's Corner
I turned off 'This Cultural Life' to listen to you. Now, I was having a coffee in Burton on the Water this morning on the way up to visit my Mother. As I was sitting on the Coronation Bench (used to be the Queen's Bench) under the sign, by the bridge, over the river Windrush. This one. There was a drake on top of a hen. That really was 'flattening the duck'. Nearly drowned the (expletive deleted)er. -
Welcome Is your project flying? Can't believe this was probably recorded 50 years ago
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It is to do with the economic principle of Division of Labour. Well worth reading up on if you don't know it. Transport costs, both environmentally and economically are tiny compared to production costs. Oil is a global business (why I lived in strange, undeveloped lands when a kid). There will be a huge difference, environmentally between Northern European producers and Nigerian or Russian. Then there is the social costs, try Venezuela to see what badly managed oil wealth can do (biggest reserved in the world). While we transition to RE, many 'oil workers' will transition as well, there is little difference between welding an oil pipe and a wind turbine tower, wiring up an oil refinery and a solar farm to the grid, developing chemical compounds to manufacture turbine blades and create FeS2 solar modules. The administrative skills needed to continuously extract, transport, refine, process, redistribute and market petroleum products are all very transferable skills (just like catering and production engineering, though many chefs cannot see that they are really production technicians). None of this transition is going to happen overnight, been happening for about 35 years in the UK, there are already a few thousand, Degree Graduates (courses in it have been running for 50 years or so), even more technicians, and many people that could easy change (digging a hole and filling it with concrete is not exclusive to the oil, road, rail or nuclear industries). 35 crane operators have just finished at Hinckley Point, not because they are useless, it is because that phase of the project is over. They can easily relocate again and lift a large turbine (very few lived in Weston Superdrug 5 years ago). So I don't see any real transition problems, though there will be a lot of nonsense news about imaginary problems that are based on legacy predujices and ill informed social commentary.
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24v lighting circuit - good or bad idea?
SteamyTea replied to SBMS's topic in Networks, AV, Security & Automation
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Two bits of news on the US electricity market
SteamyTea replied to Alan Ambrose's topic in Housing Politics
The USA grid is much more 'point to point' than the UK grid, so bottle necks are much more frequent. They also had a dash for gas about 15 years back due to the advances in deep directional drilling and fracturing. As gas is a global commodity, and the global price has risen, the USA is paying a higher price for the home market than Trump will let on. Oil prices are down though. We already have a trading scheme for large domestic users (TRIAD) and this is what some domestic suppliers are playing with when they offer time if use pricing. There may come a time when the ToU included paid disconnection. That will catch a lot of people out. The UK also has a much more regulated market than the USA, with quality of services being much higher up in importance. Really hard to compare USA and UK price structures, but easier to compare USA and EU zone they have greater similarities. -
There is, in thermodynamics a term, exergy. 'Exergy is a thermodynamic concept representing the maximum amount of useful work a system can produce as it reaches equilibrium with its environment, essentially a measure of the quality or usefulness of an energy form' You can think of it as usefulness. So take a DHW cylinder, cold feed is at 10°C. When heated up, the mean temperature may be 50°C. But the bit of water at the bottom quarter may only have a mean in 25°C. Now I don't know about others, but a 25°C bath or shower does not appeal to me much. Our combustion heating systems are similar, there is always hot flue gasses leaving somewhere. Electrical systems are the same, but it depends where you measure and compare it, at the source or the load. Can make quite a difference. This is why voltage drop is important.
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Have you read this, in this week's comic? Vitamin D supplements may lower your level of one type of vitamin D Taking vitamin D2 supplements seems to reduce levels of vitamin D3 in our body By Chris Simms 18 September 2025 Vitamin D supplements are recommended during the darker months in many countries Olga Pankova/Getty Images Taking one type of vitamin D supplement seems to cut the levels of another type that is more easily used by the body, which could affect our immune system. Our bodies create vitamin D when ultraviolet rays in sunlight convert a protein called 7-dehydrocholesterol in the skin into a type of vitamin D known as vitamin D3. When sunlight is sparse during autumn and winter, countries like the UK recommend people take supplements. Two forms of these supplements are available: vitamin D3, or cholecalciferol – which normally comes from lanolin, a waxy substance on sheep’s wool – and vitamin D2, or ergocalciferol, which mainly comes from mushrooms. It was thought that it didn’t really matter which one you took. But now, Emily Brown at the University of Surrey, UK, and her colleagues have performed a meta-analysis of 11 previously published randomised-controlled trials on vitamin D supplements, with a total of 655 participants. They found taking vitamin D2 supplements can lead to a drop in the body’s concentration of vitamin D3. Why this happens, or if vitamin D3 supplements reduce vitamin D2 levels, isn’t entirely clear. Furthermore, in many of the studies, the vitamin D3 levels were lower in people taking vitamin D2 than they were in control groups not taking any vitamin D supplements. “This is a previously unknown effect,” says Brown. A 2022 study suggests vitamin D2 and D3 have overlapping but different roles in supporting immune function. Only vitamin D3 seems to stimulate the type-I interferon signalling system, for instance, which provides a first line of defence against bacteria and viruses. Brown says the findings suggest vitamin D3 supplements may be more beneficial for most individuals than vitamin D2, but adds personal considerations need to be taken into account, such as wanting to avoid animal products. They also don’t mean people should just stop taking vitamin D2, she says. “Your total vitamin D level will still be sufficient if you are taking vitamin D2 supplements, but you might find that it’s less effective and you might lose out on those additional functions in terms of immune support.” Ouliana Ziouzenkova at The Ohio State University points out studies have shown that among older people, the conversion of vitamin D3 to its active form called calcitriol can be less efficient, so D2 supplementation may be particularly beneficial in this population. Chronic inflammation messes with your mind. Here's how to calm it From depression to dementia, we are now realising the profound impacts of long-term inflammation on the brain. A better understanding of the underlying mechanisms is unlocking new treatments to protect our cognitive function and mental health “In the absence of any evidence for negative effects, if someone who is vegan is deficient in vitamin D, opting for a D2 supplement over no supplement remains the likely prudent choice,” says Bernadette Moore at the University of Liverpool in the UK. Plant-based vitamin D3 has started to become more accessible. For instance, a tomato has been gene-edited to produce vitamin D3, but trials are ongoing. Team member Susan Lanham-New, also at the University of Surrey, hopes the research will remind people of the importance of vitamin D supplements. “There are many people in the United Kingdom and other areas of northern latitude who in winter get mild osteomalacia [known as rickets in children], caused by lack of vitamin D – which presents itself in lethargy, bone pain, muscle ache, susceptibility to infection, tiredness – and don’t realise,” she says. Journal reference: Nutrition Reviews DOI: 10.1093/nutrit/nuaf166
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I suspect that is the real problem (in many different areas). We do have the government tools to do it, we reduced VAT during the financial crisis, gave people payments 2/3 years ago. Everything is there, just needs changing, a gradual increase in FF levies of 1% a year for the next 20 years and things will change very quickly. Everyone will know what is happening and it will not cause a market shock. An initial 1% on the levy is not the same as 1% on the wholesale price. Yes, they were shockingly bad. I don't have a clue how the normal voter can change things as we don't have any real choice. I do think that if an MP defects to a different party, that should cause a by-election. I suspect that most people vote along party lines and not for an individual. It is a bit like me buying from a Ford Dealer a new Focus, and before delivery, they change to a Citroen dealership and change all the wiring to whatever the French call wiring (câblage, or cabbage).
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Yes. Been steaming large posters off walks all morning and my fingers are still strange feeling. 125 lt is only a ten minute shower for many people.
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About what I use, but then I am self indulgent and have a bath every day. Have I mentioned that the water and waste down here is the most expensive in the UK. 3 years ago, the water cost more than the heating if it, and if I had a heat pump, or a gas/diesel boiler, rather than E7, then it would still be more expensive.
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My Father worked for Royal Dutch/Shell, he knew about it in the 1950s. The science is so well understood that only the uneducated can argue against it (not the same as arguing the local effects i.e. daily weather). Attributing who are the big polluters is not hard, and if we try and make them pay, nothing else will happen for over a decade as the court cases will drag on. So much better to use the tax system to change behaviour. It is fast and effective. Heard Ed Sillybum on the radio yesterday, talking about (in part) not charging VAT on energy. For domestic users it is 5%. There is more variation between tariffs. We just need to change the wholesale markets mechanism, what worked well to attract investment over the last 2 decades is now outdated. So rather that talk about net zero, just tax, at a rate to discourage investment, combustion technologies. And stop grants for domestic installations. They have skewed the market so badly that they are hammering uptake. Happened in the PV market, we still have people on here that won't fit PV because the export payments are now tenth of what they were. I still buy a Macdonald's single cheese burger, even though in the last 2 years the price has gone up 50%. It fills me up quickly (well 2 do) when I am in a long car journey, and cheaper than a coffee at Costa.
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Using 125lt of 40°C DHW, for 10 people, that is 45 kWh.day-1. If the HP can deliver at a reliable 6 kW for most of the year, then it will be just heating water for 7.5 hours each day. That, because of the relatively small size of the cylinder, will need to be recharged a few times each day, so very little chance of using a time of use electricity tariff. 165 m2 is not a large house, and with 10 sweaty bodies in it, not much space heating will be needed. If you are not too worried about looks and a slight bit of internal noise, then consider A2AHPs, they are the cheapest to fit, run, and give a fast response, and cooling if needed. Then get a separate heat pump and more cylinders for DHW needed. Make sure your incoming supply can run multiple heat pumps, and consider a bit of PV if suitable.
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This 'it is just like a normal flu outbreak' Influenza is a huge killer. But what is the purpose of comparing one infection with another, they all need to be treated. Fungal infections kill millions of people, but I have never heard a conspiracy about it, probably because the dickhead have not learnt of them, it is not as if they sit down every Thursday and read New Scientist. Fortean Times maybe.
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About Aviation, but interesting stuff about hydrogen and biomass
SteamyTea replied to SteamyTea's topic in Boffin's Corner
Prof. Brian Cox did the same calculation, but got a different result. At today's global energy usage, all the biomass on the planet would last 400 days. Plants will convert about 0.25% of solar energy to biomass, PV will easily convert 10%. -
Can I comment again now?
