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Everything posted by SteamyTea
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242687391.49205172062 light years
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Insulation, Heating, time constants etc. Am I expecting too much?
SteamyTea replied to ProDave's topic in Boffin's Corner
And that really annoying thing that happens every now and again has happened. No matter what I do with the formatting, it stays as strike though. -
Insulation, Heating, time constants etc. Am I expecting too much?
SteamyTea replied to ProDave's topic in Boffin's Corner
If my memory is working right, thermal inertia is m2.K-1.s-1 for a given thickness of material i.e. your walls. So say you have 100m2 of wall and you have heated it up by 10°C in 24 hours, that is: 100 [m2] /(10 [°C] x 86400 ) 100 / 86400 0.000166 m2.K-1.s-1 Now if your wall is 200 mm thick, then 0.000166 / 0.2 0.0005787 m2.K-1.s-1 The reciprocal of this is 0.48 h.K-1, so about half an hour to raise the temp up by 1°C I have made some assumptions there as I don't know the size of the wall area, or the thickness. There is also the problem that the wall can only heat up (or cool down) once for every temperature change, it is not really like a proper battery as it only has the temperature differences to work with, not an excess of temperature. Then there is the problem of heat loss to the outside, that probably accounts for the wall being at the median temperature point of inside and outside. And I have not taken other losses, or gains, into account. -
Does in my deck
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53! = 4.2748869 Cube root of that is 1.6229623 has Sugar cube is 0.01m long, so cube has sides of 1.6229621m or 1.6229618km .
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Or Catholic even
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I am sitting in my Aunt's kitchen, which is almost identical to my Mother's kitchen, except it is in a different country, on a different continent and separated by a decade at least (Aunt's is older). How odd is that. Both kitchens are almost the size of my house.
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As long as I can make it do this:
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Yes please. I am sure Build Hub could cobble something together with a Pi Zero and a 1-wire sensor
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That is the way to do it, set achievable targets and get on with them A good rumour is halfway around the world before the truth has its pants on!
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Be interesting to set one up that senses interior temperature as well. If it is a simple control system it could work well for roof lights.
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I am keeping my mouth shut except to mention that the contingency is 17% for each element. To my mind that is just a fixed costing and is not based in reality or experience. Try getting away with that in a restaurant because the chef is useless and see how long your last.
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I use trestles, some 2 by 4 timber lengths and a bit of OSB which I cover with an old toughened glass shower door when I want a flat smooth surface (not managed to shatter it yet). This was only a temporary measure about 8 years ago, I have greater plans for my real shed. As for legs and sweeping the floor. I have the same problem at work. What is needed is a plinth, or a look alike, sealed, plinth. Then simple shelves with a back to them (stops things falling out of sight). Draws may be useful too, sealed when closed, can't close them if you are messy. Much better than open boxes that fill up with dust. Also worth putt a fixed back on the rear of any bench, again, it stops things falling down between the wall and the dusty boxes and shit under the bench. And why is a bench never quite big enough?
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How does Sageglass sense the light levels, or more specifically, where does it, inside or outside. And does it only sense light levels, or can it also sense temperature inside the building?
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I don't know, but see it spelt like that quite often.
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What is Imflammable then?
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The advantage of a camper van is that, when things get really bad, you can drive away and have a little holiday
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I am sure it has been discussed before on other places, but I can't remember if anyone came up with a reason. I can't see any engineering issues, and thermally it is probably better. Many of the houses have timber windows here, I would say the majority in the older parts of town. The weather here is severe, it is Atlantic coast and gets hit by tropical storms and hurricanes (46°N), temperature swings are greater, but humidity levels are similar. I suspect that it is just tradition, and that very British way of making an easy job difficult.
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Can you wire in the fan so it only comes on when the tumble dryer is on? Then it is only a few Wh when it is needed.
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Having little to do over here, I have been walking a lot (better weather than a Cornish summer). I have noticed that nearly all the windows are set to the very front of the wall. The only ones that seem to be set a little further back are the brick places, and these were probably commissioned by English immigrants (like my family). So why do we set out windows so far back in England?
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My overriding impression of my first trip to Nova Scotia in nearly 30 years is that every drink is served in a paper cup. Taken me 10 days to find a cafe that sells in a porcelain mug. Coffee was dreadful, bleeding organic. Give me the sweat of uneducated child labour any day. Mind you, it is only C$2.15, or around £1.30 in real money with the Queen's head on it.
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Write to Kevin McCloud, I did. https://www.granddesignsmagazine.com/kevin-mccloud/271-kevin-mccloud-on-how-he-welcomes-spring Fabric First At Grand Designs Towers, we recently received apolite email from someone called Steamy Tea complaining that I was very, very wrong to use the term thermal mass when talking about how buildings perform: ‘There is no such thing in science. There is thermal energy and mass; they are not connected.’ Unscientific it may be, but it’s an accepted term in the building world, like ‘coolth’ and ‘flying buttress’, neither of which are scientific words. Moreover, a quick trawl across the internet will reveal that thermal mass is a common term and used by, for example, the Passivhaus Institut. So what do I do? Steamy Tea’s email is not brilliantly helpful: ‘There is also the matter of thermal inertia, this is a difficult concept to understand as it is a six-dimensional problem – three physical dimensions, one of time and one each for heat capacity and thermal conductivity.’ Ijust about understand this, but know I'll have difficulty explaining it on television, unless I make a programme for the Open University that should have been broadcast on a Tuesday afternoon in 1973. This is an important point, because a ‘fabric first’ approach to building that employs stacks of insulation arranged around materials with high thermal mass (I mean six-dimensional inertia, I think) is the future for building in climates like ours. The idea needs communicating. So thank you to Steamy Tea for being the annoying physics teacher that I strongly suspect they are. If any readers can be helpful and elucidate as to what I should say, please write to me here at the magazine (info@granddesignsmagazine.com). I’d like to clear the terminology up, before taking on the Passivhaus Institut and the entire construction science world. Here is the reply I got from Tom from the production team. Dear SteamyTea, Thanks for your comment. We will will do our best to ensure correct terminology is used. Many thanks, Tom And Thanks for your email SteamyTea. I will bear this in mind for one of our productions. Many thanks Tom GrandDesigns Boundless And people often wonder why I think Architects and house designers are tossers.
