Grass as fuel

crude vegetable oil, diester, bio-ethanol or other biofuels, or fuel of vegetable origin ...
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Re: Turf as fuel




by urok » 26/05/18, 19:20

say, how does the principle of a gasifier work? What is the difference with anaerobic digestion?
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Re: Turf as fuel




by Did67 » 27/05/18, 09:27

The straw / turf mixture also goes (in gross fresh weight, 10 kg of clippings for 1 kg of straw, the clippings are mainly of the fleet).

It is less ideal, because the decomposition is "differential". But who knows only ideal situations in his life ???

And indeed, a little grass in thin layers and / or dried, is an organic fertilizer for greedy plants: potatoes, cabbages ... And in general, those of which we consume the green biomass produced, generally greedy "in nitrates ...
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Re: Turf as fuel




by chatelot16 » 27/05/18, 09:48

methanisation: bacteria transform what suits them into methane: the bacteria does not use all the carbon, the solid wood is not used and stays in the digestate ... the woody part of the straw is not used either

gasifier: it burns everything that burns but because of a lack of air combustion does not go from C to CO2 but only from C to CO which is a combustible gas

there is also hydrogen in the composition of plants and it does not go from H to H2O because with the presence of incandescent carbon H2O reacts with C to make H2O + C> CO + H2

the C + O> CO reaction may seem like a loss of part of the energy, but in a well-made gasifier the heat loss is reduced as much as possible and the temperature would rise to overheating, and steam is added voluntarily of water to the air admitted so that the reaction H2O + C> CO + H2 absorbs the heat produced by C + O> CO

a perfect gasifier with a good recovery of the heat of the outgoing gas to heat the supply air and a good thermal insulation has a theoretical maxumum yield of 100% ... as usual we do not reach it but it can not to be very good

it should not be confused with gas for vehicles used in 1940 which were simplified not to be too heavy and had poor performance

the good performance was obtained in 1900 in fixed gas generator to run gas engines: these system had a much better performance than the steam engine ... and it was stopped when these engine was replaced by engine electric
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Re: Turf as fuel




by urok » 30/06/18, 12:58

Hello everyone,
I wanted to close this post thank all the actors who advised me on the subject.
Thanks to them, I can see clearly: it is not possible to use lawn clippings to heat through a stove or a multi-fuel boiler.
For the good and simple reason that the calorific value is too low, the ashes and the production of clinker too important.
Thanks again and see you soon in another post.
Good day to all.
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Re: Turf as fuel




by Christophe » 10/09/22, 11:19

Ahmed's wood paper log press could, I think, make grass briquettes very well if you add (maybe?) a little binder? A bit of wet paper/cardboard?

waste-and-recycling/sawdust-paper-log-press-t17058.html

It itches me because I have a lot of grass clippings every year...Ahmed, could you please give it a try, sir? 8)
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Re: Turf as fuel




by Ahmed » 10/09/22, 11:43

Turf is very compressible, but very elastic. From my experience with wood chips, I can conclude that a noticeable proportion of grass will inevitably lead to failure: shapeless brick that does not hold together... : Cry:
The only way to make a sod brick (and without further drying!) is to bind it while it is still under pressure:
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Re: Turf as fuel




by Christophe » 10/09/22, 11:53

Ah yes... damn 8 minutes to take out 2 mini haystacks... it's not going to be very productive...

But his press doesn't have the pressure of yours and the weed has no binder...

I wonder if a mix with old (well) wet honeycomb cardboard would not be a good solution given the glue it contains...
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Re: Turf as fuel




by Ahmed » 10/09/22, 12:17

Do not count on the effect of the corrugated cardboard binder: it does not represent much; moreover, I doubt that your lawn will be very impressed with it, even at a higher dose. It is indeed necessary to take into account the spring effect which will not be circumvented by a stronger pressure. Don't forget that I also made a hay baler according to American plans and that I therefore have experience in the matter...
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Re: Turf as fuel




by Christophe » 10/09/22, 12:25

Ahmed wrote:Don't forget that I also made a hay baler according to American plans and that I therefore have experience in the matter...


Oh? What dimensions? You presented it somewhere here (I didn't read 100% of your press topic...)
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Re: Turf as fuel




by Ahmed » 10/09/22, 13:20

I think it was in the subject of Did on gardening under hay... I give you a photo of the "beast":
IMG0008A.jpg
IMG0008A.jpg (234.66 KB) Viewed times 1428
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