[Stoves] [biochar] Re: Chaff cutters and wood choppers
Paul Anderson
psanders at ilstu.edu
Sat Jan 4 14:07:58 CST 2014
Mark,
I am not good at estimating price points, and the number of variations
(feeder rollers, flywheel, thickness of sticks) are so numerous that to
say a price without specifying all the rest might not be very
realistic. So, as a NON-engineer, I request assistance from other
readers about price vs features.
Even if I purchased one for where I live (Illinois, USA), my usage would
be limited, and not related to amounts like tons. And to export from
Mexico to Africa would be in the same league as importing cutters from
India, meaning: difficult.
I would like to know what could be accomplished at different price
points. Is that a reasonable place to start? (I hope others will
comment. And maybe something can be accomplished.)
Mark, where are you in Mexico, and when did you move there? Greetings to
your wife.
Paul
Doc / Dr TLUD / Prof. Paul S. Anderson, PhD
Email: psanders at ilstu.edu
Skype: paultlud Phone: +1-309-452-7072
Website: www.drtlud.com
On 1/4/2014 2:23 AM, Mark Ludlow wrote:
>
> Hi Paul,
>
> It would be useful if you could state a price point that would make
> equipment like this realistic. The machine Rolf describes is typical,
> but I appreciate the fact that limbs and trunks are fed at an angle.
> Shearing at an angle reduces the shear force required and thus
> increases the output per unit of power input. I could build a
> no-frills (except for safety systems) chipper like the one Rolf
> describes, here in México, at cost, if you are interested. México is
> the productivity-adjusted, lowest-cost producer in the world, as of
> 2014. Yet many are unemployed.
>
> If you tell me some number, say $/MT of green input, this gives us a
> target to design against. I think that energy-storage (flywheel) to
> accommodate impulse loading may work, but the amount of energy
> required is easily calculated and is reflected in the nominal
> hourly-input rating.
>
> I will support development costs (as a non-profit) if you will tell me
> there is a market for XXX Machines at XXX Cost on the horizon.
>
> Buen Viajo en Africa!
>
> Mark
>
> *From:*biochar at yahoogroups.com [mailto:biochar at yahoogroups.com] *On
> Behalf Of *Paul Anderson
> *Sent:* Friday, January 03, 2014 11:29 PM
> *To:* energiesnaturals; Discussion of biomass cooking stoves; Bob
> Fairchild; Ron Vanetten; biochar at yahoogroups.com
> *Subject:* [biochar] Re: [Stoves] Chaff cutters and wood choppers
>
> Rolf, Crispin and all,
>
> Very good reports.
>
> It would be very nice to have a summary of the manufacturers and
> models (with price and cutting attributes).
>
> ASSUMING that some one or a few of these devices (and not toooo
> expensive) can do the stick and small branch cutting, we need to get
> some of them into action in places where we can use the fuel for the
> stoves.
>
> Any assistance to accomplish this would be appreciated.
>
> Paul
>
> Doc / Dr TLUD / Prof. Paul S. Anderson, PhD
> Email:psanders at ilstu.edu <mailto:psanders at ilstu.edu>
> Skype: paultlud Phone: +1-309-452-7072
> Website:www.drtlud.com <http://www.drtlud.com>
>
> On 1/3/2014 1:19 AM, energiesnaturals wrote:
>
> The Jensen Buschhacker is a kind of disc chopper wth only 1 blade
> sopported in front of the actual disc and thus free to let up to
> 12 cm enter the space between fixed counter knife and the rotating
> blade. The wood enters horizontally, but at that 30 or so angle to
> the disc's plane. The cutting length is given by the speed of the
> advance rollers/cylinders vs. the rotational speed of the disc as
> usual.
>
> These devices are no toys, the biggest of them cut nearly 20 cm of
> oak branches!
>
> My 60 y.o.Buschhacker munches through 15 cm of softwood and 12 cm
> of extremely hard dry GREENOAK (quercus ilex) and wild olive. And
> this is the middle model of 3.
>
> Of course you wouldnn't want to lift these branches high up to
> insert them into a garden chipper type, thus the horizontal
> cutting angle.There must be a series of photos on the bioenergy
> list somewhere, but i cannot find it from where i am right now.
>
> Rolf
>
> Enviado desde Samsung tablet
>
>
> CPP GMail <crispinpigott at gmail.com>
> <mailto:crispinpigott at gmail.com> escribió:
> When the blade impacts the wood/branches are they pointed
> downwards? That would tend to pull the feedstock in as well as
> provide the bevel cutting effect.
>
> Thanks
>
> Crispin
>
> ------------------------------------------------------------------------
>
> *From:* "energiesnaturals" <energiesnaturals at gmx.de>
> <mailto:energiesnaturals at gmx.de>
> *To:* "stoves at lists.bioenergylists.org"
> <mailto:stoves at lists.bioenergylists.org>
> <stoves at lists.bioenergylists.org>
> <mailto:stoves at lists.bioenergylists.org>
> *Sent:* 3 January, 2014 12:54 AM
> *Subject:* Re: [Stoves] Chaff cutters and wood choppers
>
> Nail trimmers indeed, but only if you intend it.I have worked with
> them time ago and as long as you put the alfalfa/hay/straw right
> on the conveyor chain and let the advance cylinder in front of the
> cutting wheel do it's job, there is not much danger to get caught...
>
> Btw, they still build them in Spain as i inquired for Christa some
> month ago.
>
> The same principle applies to the Jensen Buschhacker i described
> earlier.
>
> Not only has it 35deg angle between advance rollers and disc
> plane, but the blade position in the disc cuts much like you would
> cut through aloaf of bread with a knife.
>
> This enables the Jensen to perform very well with only 12-15 hp
> tractors on the pto.
>
> My Laimet Hp 21 also saves energy cutting, but we strongly miss
> the advance rollers.
>
> We are actually busy implementing them together with a pickup
> system for prunings and forest slash for the Laimet and two modern
> Jensens.
>
> Guess for what!
>
> Rolf
>
> Enviado desde Samsung tablet
>
>
> mtrevor at ntamar.net <mailto:mtrevor at ntamar.net> escribió:
> The one at the link above is really advanced
> when it comes to safety which is good
> because this sort of machine was responsible for more lost fingers
> than any other piece of farm equipment.
>
> Impressive piece of machinery and EXACTLY my immediate reaction---
> Nail
> trimmer extreme!!!
>
> M Trevor
>
>
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