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cornish wood burner

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Everything posted by cornish wood burner

  1. cornish wood burner
    Yes but remember I've no idea what the machine is. If you have micro switches pull a wire off and test with a meter. Contacts are hidden on the inside but the switches are as cheap as chips.
  2. cornish wood burner
    I'm sure it'll be fine but just in case I would recommend sleeping with one eye open.
  3. cornish wood burner
    Steve's right I would think
  4. cornish wood burner
    Yacht varnish
  5. cornish wood burner
    Long time ago since I read the literature but I believe mine reads a wet basis. The fact is you cannot trust a meter without checking. It has a range from 5 to 50% but is only accurate on a wet basis from 20% to 35%. It reads increasingly low above 35% and below 20%. I believe it compensates for temperature and was more expensive than some.
  6. cornish wood burner
    Might just be your clients version or even their understanding or explanation of the law. If your passing I would have a chat with the neighbour. As been said no way throw it over the fence.
  7. cornish wood burner
    Only polite to inform the neighbour of the work anyway.
  8. cornish wood burner
    That 105 obviously varies a bit with return water temp. I would be interested in your thoughts about the O2. It's on my list of things to experiment with. In to work tomorrow so can give you exact figures. There should be some scope to up that output I believe but my successor is playing with it at present so not quite sure what it's set to produce. The other boiler we run the O2 at 8.5 unless demand is high then sometimes drop it to 8. From memory that's about 115 deg exhaust but it modulates down to 20% according to demand.
  9. cornish wood burner
    Unicomfort eos boiler rated efficiency up to 93% which as far as I know is energy from wood in verses water energy out. Can't think what it's called but the manufactures did a type approval test to verify this at our site. I will try and find the results if they were sent. Dealer went bust soon after this so might not have them but I believe from memory it flew through. From memory flue gas after the heat exchanges is around 105 and O2 is currently set about 11%. Moisture content varies quite a lot from summer slab wood at 18% or even just below to round wood at up 30%.
  10. cornish wood burner
    Current chip is low 20s and that probably cost a bit less than £60 if you are splitting hairs. You didn't mention boiler efficiency in your original comparison so wouldn't the energy from oil cost be higher as well?
  11. cornish wood burner
    £60/ tonne 4000kwh/ tonne
  12. cornish wood burner
    Our wood chip energy costs us about 1.5p/kWh.
  13. cornish wood burner
    This is exactly the point Andrew and I are making. Just because your meter is saying 16% how do you know it's right. I have burnt thousands of tonnes of larch in our wood chip boiler with no problems. Some short ends have found their way into my Rayburn again no problem. Simple enough to check your meter.
  14. cornish wood burner
    They are very good. 5 or 6 amp contacts in something that size is pretty amazing. Most of mine are subjected to high temperature, humidity up to 98%, vibration and the occasional hot bath. To be fair to the little beasts a big proportion of failures would be in the activation mechanism, dirt, dust etc, something for the OP to check.
  15. cornish wood burner
    I've just cut a hole in my oak floor for a hearth and it came out at 9.2%. Some underfloor and some heat from the Rayburn the other side of the wall, so D&D seem to know their timber.
  16. cornish wood burner
    True. Just me being a bit too conservative. I did put 80 originally but in reality I probably dry around 100. Unpleasant to hold for long when it comes out of the Rayburn but I'm not sure of that exact temperature.
  17. cornish wood burner
    Probably a fair comment but it should give a little more accurate comparison if you are interested. You do get a feel for moisture as you say but for many different species, hard and soft, a meter might confirm your guess. I sometimes buy wood chip for our boilers so an accurate meter is essential for pricing chip of different mc. I reckon to be able to predict the reading within a few percent by a squeeze, but most suppliers would not be happy with that.
  18. cornish wood burner
    Presumably you have a spike type meter. These meters work on electrical conductivity so the spikes go further into the end grain or bark. This gives a better electrical circuit so end grain reading could well be higher. These meters are useful as a guide but often can be inaccurate especially at the low and high end of the scale. If you want a meaningful measurement then weigh and oven dry. You need some kitchen type scales that weigh to a gram. First weigh your wood. Dry in a slow oven 60 deg ish for 24 hours until the wood stops losing weight. Divide the weight loss by the original weight and you have the moisture content as a normally used wet basis. If you do this for a few different pieces then you will get an idea of your meters accuracy throughout the range.
  19. cornish wood burner
    There obviously something wrong. Do what Jon suggests, have the battery tested and measure the drain on the car. Most cars will struggle to start after 3 weeks with all the little drains but a week that's ridiculous. Check for the obvious things before going too far, interior lights, boot light, don't suppose there is a light under the bonnet, stereo running etc.
  20. cornish wood burner
    Some 3 phase motors run 415v or 680v. Not the most common but they are out there. Check for it on the motor plate.
  21. cornish wood burner
    The trick is to have a skill, kit or a product that your average householder will pay for because they cannot do it themselves. Same goes if you are employed. I have had my share of being self employed and great most of the time. Down side can be lack of work, cash flow and chasing unpaid accounts, especially when you start. Having a customer going bankrupt can hurt when they own you a lot of money, but it's a risk you take. I made a choice 20 years ago with working up to retirement age in mind. I am employed now and I earn a good living because I have a skill that my employer will pay a premium for. You can succeed either way.
  22. cornish wood burner
    Unless you can up the temperature my guess would be it will take a few days beside a fire. I dry the softwood chip in an old microwave at work. If you are impatient and the kitchen management is not looking that's a quicker way. However anyone doing that a must be very careful not to over do it. Quick blast for a few minutes, take it out, let it steam and weigh it. As it gets warmer reduce power or time and check the weight loss. Eventually it will stop losing weight unless you over do it, in which case you will have had a fire. Not something I would recommend in a good microwave.
  23. cornish wood burner
    Definitely inaccurate in my experience. Most electrical conductivity/ pin type I have come across (including our works one ) are reasonable in the middle range but seem to stray in the high and low ranges. I have calibrated mine and between 20 and 38% it's fairly accurate. However above and below that zone it's fantasy land. Presumably useful for selling impressively dry firewood though. As Stubby says useful for making a comparison, but for an accurate reading weigh and dry.
  24. cornish wood burner
    5% is very low unless you are in a desert. It might have needed longer cooking. Even in the last hour of 24 in the oven at around 60 to 80 deg C my 480 gram piece still lost 2 grams.
  25. cornish wood burner
    They burn very well. Probably the driest I've seen for a while. I did get some slab wood under 18% in the summer after being stacked for a couple of years but that's unusual here.

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