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SteamyTea

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Everything posted by SteamyTea

  1. SteamyTea
    Use one 'ring' and it will be about 9A. So a cheap 2 kW generator will do it.
  2. SteamyTea
    Would it not be easier and cheaper to have a back up generator to run the hob (I assume an induction one) from (200 quid and a crossover switch). I have a spare camping stove, have only needed to use it once in 12 years during one 4 hour power cut.
  3. SteamyTea
    It is still worth buying a multimeter and an ampclamp, they can tell you a lot about what is happening in wires.
  4. SteamyTea
    The problem with reducing regulations too much is that you run the risk of having dangerous homes. Though I agree that there probably many regulations, and the differing interpretations of them, that add very little. The main problem with the lack of affordable homes is low wages and insecure jobs. Not only do we pay young people about half of older people, we offer them almost no security. And the gap is getting worse. Don't expect loyalty form them. It may give a pointer to future property values though.
  5. SteamyTea
    No, you also learn how to defend your mistakes, while charging the customer for the privilege. As for BSc's not taking thermal and physical science, with respect to buildings, into account. My Renewable Energy BSc did. Was a major part of it during the final year. I would think that most Architects could not quote the second law of thermodynamics, let alone the first one.
  6. SteamyTea
    I have my own endoscope, should I take it with me? What is the best thing to have for supper the night before? Will they email me the video? Be one to compete with @Construction Channel
  7. SteamyTea
    @Barney12I have had middle age firmly thrust upon me recently. The NHS has asked me to go for a bowel screening. Will I look like that cat?
  8. SteamyTea
    Maybe I should have looked at the spreadsheet and realised it was about MVHR. But as I was unable to read it clearly, I did not bother.
  9. SteamyTea
    Is re-heat the power you would need to raise the temperate up (from some arbitrary temperature), rather than just hold the temperature steady?
  10. SteamyTea
    Me neither, where are they and what do they refer to? Watts is power, kWh is energy (or heat). Are you saying that it needs somewhere between 518 and 776W of power to hold the temperature where you want it (the 21/22°C). That would be 14.43 to 18.62 kWh/day.
  11. SteamyTea
    To a certain extend, a duct is just a box with two open ends. It does not have to be round. There is a lot of wasted space inside a stud wall, see if you can use it. It is easy to make filters, that material is available online or from a manufacturer (I used to make air filters). The big issue is noise, both through the wall and via ductwork. Filters in the ducts help reduce this. I have a stud wall I would like to move one day to make the kitchen a bit larger and only loose a book shelf in the other room (I have a Kindle for books now). I thought I could put my storage heater in that wall and vent out either side. One 35 kWh storage heater is enough to heat my place. I could also pipe a bit up the stud wall, though the floor to each bedroom.
  12. SteamyTea
    If you double the diameter of a round pipe, you quadruple the area, so you can run air though at a quarter of the speed for the same amount of air shifted. I would be tempted to make up my own MVHR (see GBF about that a few years back). They are really pretty basic things. There is no reason why you cannot make one with a polystyrene box, some silicone paper and a couple of fans.
  13. SteamyTea
    Any good. http://www.buildstore.co.uk/finance/buildcare.html
  14. SteamyTea
    Are your internal walls stud walls? If they are, can you pipe the room inlet down them towards the floor? For that matter, can you take the extract out of the top of the wall. Saves having holes in the ceiling. If you go oversize on the MVHR unit (and like an ASHP, you should as you get better efficiency) you could put in quite large vents in each room. That will keep the noise down and get rid of the risk of drafts. With a house your size (not so different from the downstairs of mine), have you though of using an oversize MVHR in conjunction with two small Air to Air heat pumps. They do heating and cooling usually and cost very little. A couple of these would easily heat and cool your place. https://www.debenhamsplus.com/p/865337/1000-btu-panasonic-powered-quick-connector-wall-mounted-inverter-air-conditioner-with-4-metres-pipe-kit-5-years-warranty?refsource=Deadwords&gclid=CMDDoOr78NACFUa6GwodrG0G3w
  15. SteamyTea
    The thing with heat losses from DHW cylinders is that they are uncontrolled. So you may well end up with too much heat, and the associated temperature rise where you don't want it, or where it contributes nothing to the overall house temperature. Te worse case is that you may have to pump some air out the house to cool it. There is also the question 'What are you wanting to achieve with your DHW system?' Do you want permanent hot water Do you want lowest running costs Do you want lowest capital expenditure Do you want the simplest system I am sure there are other things, but you get the idea.
  16. SteamyTea
    Yes, that is the theory for infinite space, and quite possibly for semi-infinite space. But a room is very far from semi-infinite, and as you point out, the temperate differences are very modest within a room. Limits have to be introduced to create a more realistic model, and those limits will be small. I also think that there is not enough consideration taken into account of the emitting frequency, which is really the energy level of the source, not all frequencies are equal (as my cataracts demonstrated). I am not sure of an easy way to test ideas for radiative contribution to heating. I do have a radiant heater in my bathroom (never switched it on). Maybe I could use that and a metal plate on the wall to see what is happening. Shall think about that when in the bath. I think that the real problem is that any radiative affect is swamped by convection and conductance and very hard to measure in a meaningful way.
  17. SteamyTea
    Isn't the distances between the emitter and the receiver important when it comes to radiant energy transfer? If it wasn't the surface of the Earth would be a lot closer to the temperature of the Sun's surface.
  18. SteamyTea
    Who is paying for all these great offers on using cards? I have a standard bank account (I can change to another but never change back), seems simple. No fees (unless overdrawn), pay money in, pay money out.
  19. SteamyTea
    I like this idea as after a bath, I find that I feel quite warm and would need less heating anyway. Also made me think of something that Joe90 was saying about putting in a bit of pipework into his slab where he expects to get some solar gain (he ain't realised that it is always cloudy in Cornwall yet). Using a multiple coil set up in a slab would also give some flexibility if things don't work according to plan i.e. you can add or remove extra heating easily.
  20. SteamyTea
    The last track on the LP was my favourite
  21. SteamyTea
    That is something that should be forced upon the energy companies and the price comparison sites, would need the standing charge as well. It could be done within a week if there was a will. It makes me wonder if OFGEM know anything about the industry. All a customer would need to know then is their usage in kWh, and that is on the bill.
  22. SteamyTea
    Back to my question about the store. It seems a complicated and backward step to me. But then I like simple things. As for the SD card thing, what happens when they stop making SD cards, or they are not supported any more. I have Sony camera, it has its own card format, I think I may have an old 'XD' card somewhere. I did throw out the old floppy disks the other day, including my copies of AutoCad, Office and Photoshop. Heating systems should be designed to last at least 30 years, 50 would be better. There are no mysteries left at this level of thermodynamics, so we know what is needed and how to do it.
  23. SteamyTea
    Not sure I understand what is happening here. As it is an unvented store, does the mains water just enter it cold, get heated, then comes out the top to the tap (I don't think this is what happens). Or does the water in the cylinder get pumped though the plate heat exchanger, heating the the cold supply that then goes off to the tap (I think this is what happens). So this system will always need a working pump and a power supply then.
  24. SteamyTea
    Who has your cash Barney GBE or OVO? There is a bit on the Ofgem's website about protection. But as you say, I bet it becomes complicated.
  25. SteamyTea
    So this is the first one. Here is the FT bit on it. https://www.ft.com/content/fc943f58-b499-11e6-ba85-95d1533d9a62 (You may need to do a Google search to bypass the paywall). I heard that OVO wee offering 3% interest on any overpayment, that is an easy way for them to raise cash. But is it because they cannot raise cash any other way.
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