[Gasification] Electric Chain Saw

Sat May 5 13:58:39 CDT 2007

I use a Black and Decker electric pruning saw.  It has jaws that prevent 
round limbs from rolling and "clamp" cuts the wood with a short electric 
driven chain.  It works very well up to about 3" diameter wood.  I use this 
to cut long lengths from stands or for limbing trees.

I cut the long lengths down to size with a cheap (harbor freight) electric 
miter saw.

Of course for large wood (above 4" diameter) I use a Husqvarna chain saw and 
a band saw mill.

David Green
"Rootless half diminished"
"A voicing that resolves two ways"

----- Original Message ----- 
From: <gasification-request at listserv.repp.org>
To: <gasification at listserv.repp.org>
Sent: Friday, May 04, 2007 9:14 PM
Subject: Gasification Digest, Vol 11, Issue 18

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> Today's Topics:
>
>   1. Electric Chainsaw vs, Recip Saw (drewrt)
>   2. Bagasse Properties (A.Saravanakumar)
>   3. Re: UK Electronic gadget, NA supplier anyone? (David G. LeVine)
>   4. Doug's visit to Chile (Douglas Diaz)
>   5. Re: catalyst (Jeff Davis)
>   6. Re: off topic discussion (Jeff Davis)
>   7. Re: off topic discussion (Bob Stuart)
>   8. Swirling Diffusion Flame Tar Burner (Jeff Davis)
>   9. Re: catalyst (Peter Singfield)
>  10. Re: Bagasse Properties (Reg Preston)
>  11. Re: Electric Chainsaw vs, Recip Saw (Jeff Davis)
>  12. Re: Electric Chainsaw vs, Recip Saw (Peter Singfield)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Fri, 04 May 2007 10:18:01 -0700
> From: drewrt <drew at artforging.com>
> Subject: [Gasification] Electric Chainsaw vs, Recip Saw
> To: hseaver at gmail.com, gasification at listserv.repp.org
> Message-ID: <463B6AC9.8050804 at artforging.com>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> My two bits,
>
> I have both, a makita electric chain saw(15A)  and porter cable
> recip(13A?),   9 times out of 10 I use the recip.   It has a smaller
> kerf and so needs to move much less wood to get the job done.   I rarely
> use the chainsaw and don't know that I wil buy another.  The chainsaw is
> much easier to plunge cut with, but you can plunge with the recip too if
> you are careful about it.   One thing that is important is to get a good
> variable speed controled unit, without that control it wouldn't be
> nearly as versitile.
>
> Drew
>
> -- 
> This message is intended only for the addressee(s)and may contain 
> information that is confidential and/or copyright.  If you are not the 
> intended recipient please notify me by reply email and immediately delete 
> this email. Use, disclosure or reproduction of this email by anyone other 
> than the intended recipient(s) is strictly prohibited.
>
>
>
>
>
>
> ------------------------------
>
> Message: 2
> Date: 4 May 2007 19:27:13 -0000
> From: "A.Saravanakumar" <sara_mnes at rediffmail.com>
> Subject: [Gasification] Bagasse Properties
> To: gasification at listserv.repp.org
> Message-ID: <20070504192713.9114.qmail at webmail17.rediffmail.com>
> Content-Type: text/plain; charset=iso-8859-1
>
> Dear Booster Tom Reed,
> What will be the actual density, bulk density and void fraction of 
> sugarcane bagasse?
> Any of them working in this field are invited to render your views.
> A. Saravanakumar
>
> ------------------------------
>
> Message: 3
> Date: Fri, 04 May 2007 16:09:27 -0400
> From: "David G. LeVine" <dlevine at speakeasy.net>
> Subject: Re: [Gasification] UK Electronic gadget, NA supplier anyone?
> To: Discussion of biomass pyrolysis and gasification
> <gasification at listserv.repp.org>
> Message-ID:
> <mailman.2441.1178334883.3071.gasification_listserv.repp.org at listserv.repp.org>
>
> Content-Type: text/plain; charset="us-ascii"; format=flowed
>
> At 06:31 AM 5/4/2007, you wrote:
>>They speak French in New Hampshire.....?
>
> Oficcially?  No.  Practically?  A percentage do.
>
>
> David G. LeVine
> Nashua, NH  03060
>
>
>
>
> ------------------------------
>
> Message: 4
> Date: Fri, 4 May 2007 16:33:21 -0400
> From: "Douglas Diaz" <ddiaz at creapor.cl>
> Subject: [Gasification] Doug's visit to Chile
> To: <gasification at listserv.repp.org>
> Message-ID:
> <!~!UENERkVCMDkAAQACAAAAAAAAAAAAAAAAABgAAAAAAAAAOTVCNfc000ibPdnfotD2rMKAAAAQAAAAtZ33aCLAIEGGFFukBOrL9QEAAAAA at creapor.cl>
>
> Content-Type: text/plain; charset="iso-8859-1"
>
>
> Dear gasification fanatics,
>
> I would like to publicly thank Doug Williams for coming down
> to this thin peace of land washed by the cold south pacific.
> When he generously offered his assistance I thought O boy, this
> Can't be serious, but after his confirmation off list, I though, I'm a 
> lucky
>
> Son of a gun and I wasn't mistaken.
> This last week has been exhausting, its difficult to follow Doug's pace, 
> he
> never seems to be tired ; he flew all the way from Auckland, and there he
> was After 10 o'clock at night, "that same Sunday" trying to get a complete
> sentences in English out of my kid's mouth.
> In 5 days, I can tell you, you can talk a lot about this stuff and not 
> even
> touch the surface of this amazing mystery called gasification.
> For all of us directly involved, it was a fantastic experience, and also 
> for
> all the other guys that came along.
> After Doug's visit, I can now tell you that gasification here in Chile 
> will
> have a clean start; now we can  distinguish a pyrolytic gas from 
> producer's
> gas, and that I say is a huge step that must've taken others a life time.
>
> Thanks Doug,
> for your kindness, patience, and devotion in teaching others what you
> know.
>
>
> Douglas D?az Mc Leod
> Santiago, Chile.
>
>
>
>
>
>
>
>
>
>
>
> ------------------------------
>
> Message: 5
> Date: Fri, 4 May 2007 17:20:56 -0400 (EDT)
> From: "Jeff Davis" <jeff0124 at velocity.net>
> Subject: Re: [Gasification] catalyst
> To: "Discussion of biomass pyrolysis and gasification"
> <gasification at listserv.repp.org>
> Message-ID: <35706.152.50.3.3.1178313656.squirrel at www.velocity.net>
> Content-Type: text/plain;charset=iso-8859-1
>
> Peter wrote:
>> Still -- what can't be accomplished when one has unlimited grant funding
>> The bigger they be "funded" -- the bigger they fail!!
>>
>> Jeff -- you could do the same experimenting with some of those wood stove
>> "cats"
>
>
> I agree with all of this. They have a lot of fun with there grant money!
>
> Yes, steam reforming has been used to reduce tar.
>
> I recall charcoal was used also. If I recall correctly they (who ever)
> used external heat for the charcoal so that the charcoal was not consumed.
> Or something like that.
>
> But it is still best to start by producing less tar.
>
> On the other hand an updraft has advantages, also.
>
> Now if one had a use for the tar it would be a matter of just (easyer said
> than done) removing the tar.
>
>
> Jeff
>
>
>
>
>
> -- 
> Jeff Davis
>
> Some where 20 miles south of Lake Erie, USA
>
>
>
> ------------------------------
>
> Message: 6
> Date: Fri, 4 May 2007 19:13:30 -0400 (EDT)
> From: "Jeff Davis" <jeff0124 at velocity.net>
> Subject: Re: [Gasification] off topic discussion
> To: "Discussion of biomass pyrolysis and gasification"
> <gasification at listserv.repp.org>
> Message-ID: <23150.152.50.3.3.1178320410.squirrel at www.velocity.net>
> Content-Type: text/plain;charset=iso-8859-1
>
> Harmon wrote:
>>   Hey, BTW -- awhile back you were talking about using an electric
>> chainsaw. What kind do you have and does it work well? I was interested
>> in getting one to use in town, bought one at Menards but returned it --
>> compared to even my smallest gas powered saw (and old Stihl 017 which I
>> can run with one hand) it could barely cut.
>
> It's a Sears and it cuts well. Not like my Husk 345 but not too bad. It
> comes with one of those junk safty chains. It has a chain brake!
>
> When I'm home I'll check out the model number and report back.
>
>
> Jeff
>
>
>
>
> -- 
> Jeff Davis
>
> Some where 20 miles south of Lake Erie, USA
>
>
>
> ------------------------------
>
> Message: 7
> Date: Fri, 04 May 2007 17:37:15 -0600
> From: Bob Stuart <bobstuart at sasktel.net>
> Subject: Re: [Gasification] off topic discussion
> To: Discussion of biomass pyrolysis and gasification
> <gasification at listserv.repp.org>
> Message-ID: <B38B9BD0-AE9F-419B-AE88-A1698AB1898A at sasktel.net>
> Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
>
>
> On 4-May-07, at 5:13 PM, Jeff Davis wrote:
>
>> Harmon wrote:
>>>   Hey, BTW -- awhile back you were talking about using an electric
>>> chainsaw. What kind do you have and does it work well? I was
>>> interested
>>> in getting one to use in town, bought one at Menards but returned
>>> it --
>>> compared to even my smallest gas powered saw (and old Stihl 017
>>> which I
>>> can run with one hand) it could barely cut.
>
> Don't despair.  I've a friend who used to process firewood, and did
> the work of two other men, partly because he used an electric saw
> that was always ready to go and never needed mix.  Was your chain
> sharp?  Anything binding?
>
> Best,
> Bob Stuart
>
>
>
>
>
>
> ------------------------------
>
> Message: 8
> Date: Fri, 4 May 2007 19:35:05 -0400 (EDT)
> From: "Jeff Davis" <jeff0124 at velocity.net>
> Subject: [Gasification] Swirling Diffusion Flame Tar Burner
> To: gasification at listserv.repp.org
> Message-ID: <23827.152.50.3.3.1178321705.squirrel at www.velocity.net>
> Content-Type: text/plain;charset=iso-8859-1
>
> Dear Toby, Peter, & All,
>
> Wish I had the time to read all this stuff!
>
> PDF links below text.
>
> Here is yet one more way to rid the tar:
>
> *****************************
> Gasification is the conversion of solids into gaseous fuels. Tar
> production is one of the major problems for the introduction of gasifiers
> for biomass. Before the gas can be introduced into the gas engine, the tar
> content has to be reduced to low values. The successful implementation of
> (small-scale)
> gasification technology for gas engine or turbine-based power projects
> depends on the effective and efficient removal or conversion of the tar
> components in the producer gas. Possible ways to diminish the tar content
> in the producer gas, is by partial oxidation or thermal cracking.
>
> In figure 1, a swirling diffusion flame burner is shown. This burner is
> designed to remove the tars in the gas by combining the two methods
> mentioned above: i.e. combining partial oxidation and thermal cracking.
> Recent research shows that thermal treatment alone results in
> polymerization of the tars [Houben et al 2002].
>
> Partial combustion is performed by burning a small part of the gas, using
> very little air. This burning is used to combust the tar components in the
> gas, and should also heat the whole gas stream homogeneously; which is in
> turn needed for the thermal cracking. Especially for this thermal
> cracking, it is important for the gasses to mix well after the burner in
> order to create a homogeneous temperature and a longer residence time at
> this temperature.
>
> http://psfvip4.univ-fcomte.fr/Fpsfvip4/sources/F4071.pdf
>
> http://alexandria.tue.nl/extra2/200410709.pdf
>
>
>
>
> Jeff
>
>
>
>
> -- 
> Jeff Davis
>
> Some where 20 miles south of Lake Erie, USA
>
>
>
> ------------------------------
>
> Message: 9
> Date: Fri, 4 May 2007 17:34:40 -0600 (CST)
> From: Peter Singfield <snkm at btl.net>
> Subject: Re: [Gasification] catalyst
> To: gasification at listserv.repp.org
> Message-ID: <3.0.32.20070504172105.00b96100 at pop.btl.net>
> Content-Type: text/plain; charset="us-ascii"
>
>
> At 05:20 PM 5/4/2007 -0400, Jeff Davis wrote:
>>Now if one had a use for the tar it would be a matter of just (easyer said
>>than done) removing the tar.
>>
>>
>>Jeff
>
> Tar = wood preservative?????
>
> Tar "burns"???
>
> Tar = organic chemicals for synthesizing plastics (like coal tar)????
>
> Etc -- etc???
>
>
>
> ------------------------------
>
> Message: 10
> Date: Sat, 05 May 2007 06:50:55 +0700
> From: Reg Preston <trpreston at mekarn.org>
> Subject: Re: [Gasification] Bagasse Properties
> To: "A.Saravanakumar" <sara_mnes at rediffmail.com>, Discussion of
> biomass pyrolysis and gasification <gasification at listserv.repp.org>
> Message-ID: <463BC6DF.5060700 at mekarn.org>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> We have built a gasifier for bagasse (from "Gur" or "panela" 3-roll mill
> after two passes). Density is not the issue. Design of fire tube and
> hopper is critical.
>
> TRP
>
> A.Saravanakumar wrote:
>> Dear Booster Tom Reed,
>> What will be the actual density, bulk density and void fraction of 
>> sugarcane bagasse?
>> Any of them working in this field are invited to render your views.
>> A. Saravanakumar
>> _______________________________________________
>> Gasification mailing list
>> Gasification at listserv.repp.org
>> http://listserv.repp.org/mailman/listinfo/gasification_listserv.repp.org
>> http://gasifiers.bioenergylists.org
>>
>>
>
> -- 
> T R Preston
>
> Senior Editor, Livestock Research for Rural Development
> Readers and contributers to LRRD are requested to join the LRRD-Announce 
> List.
> http://lists.lrrd.net/mailman/listinfo/lrrd-announce
>
> UTA-TOSOLY - Finca Ecol?gica
> Morario - Guapota -
> AA # 48, Socorro, Santander, Santander del Sur, Colombia
> Tel: 57- 7-7246058
> Celular: 315-3536935
>
> http://www.utafoundation.org (Describes the activities at the University 
> of Tropical Agriculture Foundation)
> http://www.cipav.org.co/lrrd (The international on-line journal on 
> sustainable livestock-based agriculture)
> http://www.mekarn.org (The web site of the Sida/SAREC Regional Network for 
> livestock training and research in the Lower Mekong basin)
>
>
>
>
> ------------------------------
>
> Message: 11
> Date: Fri, 4 May 2007 21:50:21 -0400 (EDT)
> From: "Jeff Davis" <jeff0124 at velocity.net>
> Subject: Re: [Gasification] Electric Chainsaw vs, Recip Saw
> To: gasification at listserv.repp.org
> Message-ID: <29588.152.50.3.3.1178329821.squirrel at www.velocity.net>
> Content-Type: text/plain;charset=iso-8859-1
>
> Hi Drew and all,
>
> I also think about making a SMALL electric buzz-rig. Kind of like a heavy
> duty chop-saw (metal). The kind with the stationary motor with a belt
> going to the arbor. But this would be somewhat static.
>
> Jeff
>
>
>
> Drew wrote:
>> I have both, a makita electric chain saw(15A)  and porter cable
>> recip(13A?),   9 times out of 10 I use the recip.   It has a smaller
>> kerf and so needs to move much less wood to get the job done.   I rarely
>> use the chainsaw and don't know that I wil buy another.  The chainsaw is
>> much easier to plunge cut with, but you can plunge with the recip too if
>> you are careful about it.   One thing that is important is to get a good
>> variable speed controled unit, without that control it wouldn't be
>> nearly as versitile.
>
>
> -- 
> Jeff Davis
>
> Some where 20 miles south of Lake Erie, USA
>
>
>
> ------------------------------
>
> Message: 12
> Date: Fri, 4 May 2007 21:10:08 -0600 (CST)
> From: Peter Singfield <snkm at btl.net>
> Subject: Re: [Gasification] Electric Chainsaw vs, Recip Saw
> To: gasification at listserv.repp.org
> Message-ID: <3.0.32.20070504211350.00b08890 at pop.btl.net>
> Content-Type: text/plain; charset="us-ascii"
>
>
> At 09:50 PM 5/4/2007 -0400, you wrote:
>>Hi Drew and all,
>>
>>I also think about making a SMALL electric buzz-rig. Kind of like a heavy
>>duty chop-saw (metal). The kind with the stationary motor with a belt
>>going to the arbor. But this would be somewhat static.
>>
>>Jeff
>
>
> I built one sort of like that using a cheap Chinese Chop Saw -- adapting a
> 12 in diameter carbide toothed circular saw blade to it -- sticking it
> upside down and mounting it under a table top -- with an appropriate hole
> in the appropriate place.
>
> As these Chop saws are high power low RPM -- it works real well.
>
> I have both a cross cut and a rip blade for it -- and often use it as a
> micro saw mill to harvest small boards from  very exotic hardwood "rounds"
> -- or even "splits" -- like the nice Rosewood I found last year --
>
> You cut it up to lengths of two or three feet long -- split it -- then run
> it through this micro mill. Works real fine -- but limited to about 4.5
> inches cut -- on a single cut -- or if your careful -- to 8 inches on a
> double cut.
>
> You might want to try this yourselves?? Very fast and economic to put
> together -- and ends up quite reliable to!
>
> Peter
>
>
>
>
> ------------------------------
>
> _______________________________________________
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> Gasification at listserv.repp.org
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>
> End of Gasification Digest, Vol 11, Issue 18
> ******************************************** 