openspaceman
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Everything posted by openspaceman
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and better insulated I wouldn't need to heat with wood. -
what's wrong with starting a small fire adjacent and hand balling the heap on to it, that way any mammals can get away. Having seen burning rabbits trying to escape a fire and chasing them to put them out of their pain I won't fire old piles in situ.
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I would have thought that is the only time you need to advertise, once you get established most work is from recommendation, or was in my case.
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I'm just wondering why HMR&C weren't there dipping their tanks for red diesel use in non agricultural activity
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I'm surprised that it gets beyond being torrified as that's only 260°C, without referring to texts I thought it needed to get to 330°C before it was proper charcoal.
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I think @adw means put a spacer between the clutch shoes and the drum.
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So the 500°C is separated from the char by the wall of the retort. Thus it's unlikely you will achieve equilibrium with the same temperature inside the char, as I said once the char exceeds the ~450° temperature after the exothermic stage more energy is needed as some of the carbon changes from a chain like structure to more graphite like ring structure. I wouldn't worry about cooking it longer, keep an eye on the flames of the offgas and when they die down it's good enough. One thing is that the pyrolysis is much faster than drying wood, so it is better the drier the wood is to start. Else the energy for drying has to be supplied through the retort wall.
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Okay before I take it all apart it looks like I need to get the intake boot off to look at the impulse line but suppose this means taking the cylinder off?
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Re reading your earlier post it isn't clear that the clutch drum is spinning freely on its needle bearing
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If it was plastic string it will have melted into various places, including the sprocket nose bearing.
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I thought I had answered that question but I note no answer to my Thursday question. The rate of charring is very dependent on initial mc.
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Thanks to spud's link to the secondhand coil and flywheel I have it running with the coil. It cuts well but takes a while to slow down to tickover once the throttle is released, any suggestions. First I will check if the butterfly is snapping shut but I wonder about an air leak. I have a short video: VID-20250206-WA0000.mp4 - Google Drive DRIVE.GOOGLE.COM which I will leave up for a little while
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Bar Recommendation after totalling my Tsumura
openspaceman replied to Whoppa Choppa's topic in Chainsaws
Yes I can see that and presumably it is a bit harder so should wear less?? -
Bar Recommendation after totalling my Tsumura
openspaceman replied to Whoppa Choppa's topic in Chainsaws
That's a bit brittle, I have bent a bar through 90° but never broke one -
So many variables, species?, Top height?, average dbh?. Stacking whole trees to chip for biomass ,on site, in future can be fraught with difficulties as well as roadside space. It also needs a decent volume to justify the machinery. Firewood works in lots as low as 20m3 if an 8wheeler and crane collects.
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I prefer the term pyrolysis offgas for what evolves from slow pyrolysis. To me syngas is specifically a mixture of carbon monoxide and hydrogen that is produced by the gasification ( 0.2 stoichiometric air) of carbon (coke). I am not a chemist and I was too stupid to learn chemistry at school, my brother was though and top of his field in carbon. As to extended cooking; I expect once a retort has reached 450°C no matter how long you kept at that temperature not much would change. It's complicated by the feedstock but if the temperature uniformly ramps up to ~300°C the endothermy of drying and torrefying is over, then there is a short exothermic stage when the pyrolysis continues up to 440°C. After this the carbon matrix begins to change, whilst pyrolysis and cracking witin the matrix continues, and this is likely endothermic.
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No need for arguments, I'm happy to explain my understanding but not getting involved with bickering.
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It is not gasification and no oxygen is added as in gasification. If you consider that instead of wood being a complex mixture of cellulose, hemicellulose, lignin and trace compounds you simplify it to a compound of elements in the ratio C:H1.4:O0.6 then when you add energy they disociate and reform as true gases H2 CO CH4 , I haven't accessible text or inclination to work out the proportions but there is little C left over.
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With slow pyrolysis as you heat it beyond about 450°C , when the charcoal is about 25% of the dry weight of the original wood, more tars are volatilised, these contain carbon, hydrogen and oxygen, until you reach a point at above1000°C when less than 15% of the weight of the original wood remains the char is almost pure carbon and ~10% ash. Fast pyrolysis, where a wood particle is subjected to a temperature rise of more than 1000°C in a second, converts nearly all of the wood to gases and ash.
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So the thermocouple measures the temperature at the top outside of the retort?
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I doubt it would all be that thin and how thick is new underground duct pipe? Anyway I always prefer to re use rather then buy new if it's cheap.
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Shame you are 600 miles away, I'd buy some for underground conduit for the 300V DC cables from my shed 50ft to the house.
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Thanks for that, I misremembered but knew 400mm came in to it
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Once the population is displaced, dispersed or eradicated there is only one nation that will settle it and create tourist resorts.
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You need to check part J of the building regs, I thought you were only allowed 400mm of single wall above a stove.
