SteamyTea
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Everything posted by SteamyTea
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DIY Airtightness test (the Blue Peter method)
SteamyTea replied to ProDave's topic in Boffin's Corner
Get me 200 Marlboro and I will be around in no time -
Cheers, when I pluck up the courage and my G/F has had her new bathroom fitted, I shall give it a go.
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I am going to jump on this thread with my immersion problem (but not trying to hi-jack it). After 30 years it seems my bottom element has gone and I need to replace it (200 lt copper E7 cylinder). What are the chances of getting the one out (I have the tools) after 30 years without distorting the copper cylinder? Is it worth squirting it with WD40 or similar for a few days? Tap it gently, or just wrench at it with the big spanner, or use the box spanner and the short rod?
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That is similar to what I tell people. If they object to a developmental, they can buy the land themselves. There is a twat over at the 'other place' that thinks his area is unsuitable to bring up children, I suggested that he moves. He did not get it.
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Yes, I would use a simple RH 'switch' to control it as until it is up and running, and the house all settled in as it is hard to guess what is actually needed until then. As a general rule it is not worth getting to hung up and very fine control with temperature and humidity levels, humans are pretty adaptable to varying conditions.
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The conversion is easy: http://hyperphysics.phy-astr.gsu.edu/hbase/Kinetic/relhum.html One advantage of using AH is that you end up with a measure of what the problem is i.e. how much liquid water is entering your house.
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I am sure that will come, but at the moment they have to act fast and make sure places are safe, or not.
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That would be a reason to use AH and temperature as it could automatically adjust for that. Or use a sensor on the input side as well and correlate the differences with internal temperature.
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Our old mate DamonHD did some work on this and I looked at the data. Seemed there was a good correlation between occupancy and RH/CO2 at the school he monitored. It was also possible to see increases in road traffic when the school was empty. By doing co-variance statistics you can correlate for temperature differences i.e. when the house is empty and unheated, or at night. I think I still have both Damon's and some of JSH's data and may have a look later and see what can be teased out.
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Yes, that is what I thought.
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If it really has a RPi as the controller, pull it out and connect a monitor and keyboard to it, power it up and see what IP comes up.
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Yes, The MacD's AP caught me out too. With cheese it seems the harder it is, the less heat it holds. But I dislike cottage cheese.
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I have just burnt my mouth eating a cheese omelette (had 3 of them really). This got me think about the latent heat of fusion and what it was for Cheddar. So a quick google and I found out it is 123 kJ/kg [0.0341667 kWh/kg], water is 334 kJ/kJ. Now it is always best to use a material that can store the most energy, but water fuses at 0°C, so is of little use. But the melting point of Cheddar is about 65°C. It would be fun to make a thermal store out of cheese as it would store a decent amount of energy, smells nice at first and you can eat it if you get hungry. Anyone have any other favourite foods that they would like to try out?
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Shall try with the latest version and see what happens, seems Windows Creator update has caused some problems, thanks.
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Is anyone using VirtualBox on a Windows 10 machine and had trouble since the latest MS update. Mine has stopped working in both the installed version and the portable version.
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CO sensors might be that cheap, I don't think that CO2 ones are. They are a different beast. There is such a good correlation between CO2 levels and humidity differences once temperature is taken into account, that I think you can rely on just RH and some simple arithmetic to control an MVHR. Re the web/app control interface, how would you deal with the controls if the manufacturer stopped the cloud service? Would you end up with either a dead system or one with just very basic functionality? Was it Nest that pulled the plug on home monitoring and control?
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Bonding Fibreglass to PVC Pipe
SteamyTea replied to Barney12's topic in General Self Build & DIY Discussion
You can get self etching polyester resins and there is a paint on liquid to help bonding to PVC (can't remember the name, it was a white coloured liquid, possibly a silane). If you try and bond to the internal surface of a pipe you will almost certainly have problems as the GRP will shrink while it cures. This may not be obvious at first, but it will in time. Also worth applying a gelcoat to the PVC first as this can allow for a better mechanical lock if the surfaces is scored (roughed up). It also allows the base resin to adhere better. Or you could apply a release agent to the inside of the PVC, then a gelcoat and a 'fast mix' for the layup. This will shrink away. Then you can release the pipe from the GRP, smear it with silicone sealant and reassemble.- 76 replies
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Back in the early 90's, there was an incident with a sauna. Apparently the cable was sub-standard and the cleaners had managed to trap and crush it under the panel (the rules for installation got changed after). Either fault on its own was not enough to cause a fire, but the combination of the two was. So this is not a new problem.
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combustible kəmˈbʌstɪb(ə)l/ adjective adjective: combustible 1. able to catch fire and burn easily. "a combustible gas" inflammable ɪnˈflaməb(ə)l/ adjective adjective: inflammable 1. easily set on fire. "inflammable materials" flammable ˈflaməb(ə)l/ adjective adjective: flammable easily set on fire. "the use of highly flammable materials" Aluminium combustion temperature: 600-650°C
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Penzance has just had a drop in temperature of 5°C (26° to 21°) in 3 hours 22 minutes. That is 1°C every 40 minutes. Inland a bit at Carnkie, it has dropped 1°C every 27 minutes. May have to put my jumper on.
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Too true. What a small amount of storage can do is help the national grid by smoothing out spikes. Think mornings with electric showers and kettles boiling. If a home runs a 10 kW shower for 20 minutes (more education needed) that is 3.3 kWh, if 10 million homes had 4 kWh of storage that was dedicated to that task, then we could defer that 4 GWh load. Now I have know idea what people pay to have an electric shower fitted as it is a relatively cheap part of a bathroom refurbishment. At the moment the cost of battery storage is prohibitive, but if the cost can be reduced to £1000 (highly unlikely for the foreseeable future), then it would become viable. One way to incentivise would be time sensitive electricity pricing, say 70p/kWh between 6:30 AM and 8:00 AM. This would make the daily shower cost £2.31, compared to 40p. Over a year that would be a price difference of around £700. Trouble is that at £700 a year, a simple vented storage cylinder and pumped shower would be cheaper to install and run (size may be an issue). Or maybe an Sunamp. I think than rather thinking of payback times, comparing it to alternatives is a better idea.
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Can you monitor the extra energy used. 26°C sound comfortable to me, but then I grew up in the Far East and the West Indies.
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Thanks Dave I have not heard any mention recently of overheating problems, I think it is because the sun is high in the sky and sets in the north west at the moment. Air temperatures down here have not been exceptionally high, around 22°C, but the sea is not fully up to temperature yet.
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As we have had a few sunny days recently and pretty close to the longest hours of daylight, has anyone suffered increased overheating? Decent temperature data is always welcome, but a general response is also useful.
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Avoid Crown Brilliant White Premium Matt. Leyland Trade Brilliant White seems good though.