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SteamyTea

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Everything posted by SteamyTea

  1. SteamyTea
    Yes, this is always the problem, and we are still, on electricity, paying a premium for installing new RE, but the gas network is not contributing much to it. For twenty years everyone has known that a carbon tax is the way to go, but each government has be too scared to introduce it, so they have this sneaky tax what most people do not realise. A 1p/kWh would have raised around £16.5bn in 2019. Dirt cheap.
  2. SteamyTea
    So is the national Grid. We are close to 50% RE now, and we get that very reliably for 20p/kWh, with no large upfront cost, and no replace costs. I do understand the charm of energy self sufficiency, but the huge upfront, and maintenance costs are off putting. Even with my low energy usage <5 MWh per year, it is not worth me swapping out my storage heaters for a wet ASHP. A2A is marginal. I keep meaning to look at just fitting PV to heat my water. If I had a bigger house, the whole thing would be easier, but with a 4m by 8m footprint, and the half the roof being SW facing, options are limited.
  3. SteamyTea
    To me that points more and more towards a serious air leak or in the parlance, thermal bypass. Maybe see if the room is noisier. Can get a phone app to measure it.
  4. SteamyTea
    Well that is not excessive. Is a fan blade damaged.
  5. SteamyTea
    From the Wikipedia page.. It may be carcinogenic, as it has been linked to cancer of the lungs, liver, and pancreas in laboratory animals.[28] Other animal studies showed breast cancer and salivary gland cancer. Research is not yet clear as to what levels may be carcinogenic.[1][23] DCM crosses the placenta but fetal toxicity in women who are exposed to it during pregnancy has not been proven.[29] In animal experiments, it was fetotoxic at doses that were maternally toxic but no teratogenic effects were seen. I think the word 'may' is the important one. Probably get the same warning for acetone.
  6. SteamyTea
    What is your DHW temperature set to?
  7. SteamyTea
    And the processing, I don't think Craig Jones looked the larger picture. One of the problems is that processing wool into insulation is a very small scale business, and anything that is small scale has high fixed overheads.
  8. SteamyTea
    Murderers!!
  9. SteamyTea
    Are you PV modules going to get shading from the trees on them?
  10. SteamyTea
    Pretty sure it is on one of the higher embodied energy and carbon insulations. ICE used to have the figures.
  11. SteamyTea
    Is that when using straw bales as the structure, not just the insulation? Right, I had forgotten that there were higher PH standards. Less than many spend on a kitchen or bathroom. No, my first boss.
  12. SteamyTea
    Last winter I think I had ice on the screen. Both times it had gone by 8 AM.
  13. SteamyTea
    Should easily heat that on a half decent day, even allowing for Cornish Cloud. Did I tell you that when I moved down it rained every day for 66 days. That record was broken last year I believe.
  14. SteamyTea
    Do you know the size off the ST? What is the ST currently heating?
  15. SteamyTea
    SW is the prevailing wind direction, so is it a case that air is blowing past/through the insulation? Also how large is the window. Real measurements help here, then theoretical heat losses can be worked out.
  16. SteamyTea
    Might be because it distributes the air more evenly. Radiators, which are really convection heaters, allow much of the air to raise to ceiling level, which will be hotter than you want, while the floor will be colder. This causes the mean room temperature to be higher than it needs to be.
  17. SteamyTea
    Could you use the 'spare' hot water on a recirculating DHW system. That can also act as a cooling circuit. I wish I had spare energy, maybe I need to run a very large TOR relay at home, then host dark web content, that should pay the bills.
  18. SteamyTea
    Yes, but not from the mains temperature each time, and any heat that escapes into the house, reduces the need for space heating. I will say though, that I am a fan of forced air heating, to me it is the sensible way to heat a building, we live in the air, not the walls, floors, furniture etc. We also like to breath in warm air, this reduces the the amount of body heating as we are filing about a quarter of our volume with something warm, several times a minute. I get hiccups if I go out into the cold.
  19. SteamyTea
    You have answered this already. Air takes 1kJ.kg.-1.K-1 Water takes 4.18kJ.kg.-1.K-1 If you work out the mass of air that is heated every day, say 2 tonnes, multiply it by the temperature difference, say 15K, you get 30,000 kJ. Do the same for water say 150 kg and 40 K, you get 25,000 kJ A similar amount (an purely speculative). The difference is that you want hot water quickly, so need a lot of power (kW), the house is heated constantly, so a lot less power is needed to deliver a similar amount of energy.
  20. SteamyTea
    Yes, never really taken any notice of them. I think the difference between mathematics and science is that mathematics does not, in itself, describe reality, it is abstract, so falls out of the set of all sciences, to use a mathematics term.
  21. SteamyTea
    Can I divide this thread by zero and get a real answer. Mathematics is just what mathematicians do, there is no consensus as to whether it is science or art. There is no Nobel Prize in Mathematics.
  22. SteamyTea
    Well English Lit ones may be. My Viva wasn't. Was a (expletive deleted) of a lot of standing on shoulders though. So much so that my research became a minor part of the narrative.
  23. SteamyTea
    What you going to do with the excess electricity in the summer? How large is the PV system.
  24. SteamyTea
    So faith healers, homeopathic and reiki practitioners are scientists.
  25. SteamyTea
    Brilliant, thanks.
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