[Gasification] Which engine design might be BEST for woodgas?

GF gfwhell at aol.com
Sat Aug 13 11:40:58 PDT 2011


Greg,
You are right about the fixed load (co generation) However, I would like to build the set to handle an inconsistent load "if" the machine has to operate independently.
My experience on the last set I built, "initially operated" independently, running on natural gas and it had to deal with sudden loads which had a tendency to pull the rpm down which effected the
frequency. I corrected this problem as best I could with a governor I made, using two synchronous motors and a "differential assembly" If both motors ran at the same speed the control shaft remained stationary. One motor was connected to the output of the alternator while the other was fed from an inverter with the desired frequency. If the frequency dropped, the out put arm moved to open the throttle, if the frequency went above the inverter output,the arm moved to close the throttle. Not having automatic advance retard would have made the control of the engine less precise.
The field voltage controlling the output voltage  was electronic and automatic. All this was done in the "analogue age" .
After a 10 hour run the mains operated electric clock was only two minutes slow.

GF




-----Original Message-----
From: Greg Manning <a31ford at gmail.com>
To: Discussion of biomass pyrolysis and gasification <gasification at lists.bioenergylists.org>
Sent: Sat, Aug 13, 2011 1:22 pm
Subject: Re: [Gasification] Which engine design might be BEST for woodgas?


GF, I was speaking of a homemade Spark conversion assembly, no
dvance, as you where speaking about a generator (generators run at a
ixed RPM).
the only thing that moves on a generator is the throttle, as to load
onditions, a 2 magnetic pole generator would need the generator's
rmature to spin at 3600 rpm, a 4 pole at 1800 a 5 pole at 1200 rpm,
his is assuming 60 hertz, 50 hertz is different. 1500 for 4 pole if
emory serves me correct.
Greg

dvance is NOT needed in Generator conditions.

On Fri, Aug 12, 2011 at 10:00 PM, GF <gfwhell at aol.com> wrote:
 Hi Greg,
 Well I do have a  Red Lion. "Rate Mutiplier/Divider". The engine is complete
 with gearbox and injectors. I wondered if the aftermarket ignition system
 might have
 an electronic automatic advance system which is hopefully adjustable?
 However, Is the ignition system capable of firing 4 spark plugs
 simultaneously? or is a "distributor" included with the kit? Sorry to be
 such a novice. The engine is a four cylinder 1300 cc I believe.

 GF


 -----Original Message-----
 From: Greg Manning <a31ford at gmail.com>
 To: Discussion of biomass pyrolysis and gasification
 <gasification at lists.bioenergylists.org>
 Sent: Fri, Aug 12, 2011 9:33 pm
 Subject: Re: [Gasification] Which engine design might be BEST for woodgas?

 -Hi GF, List.
 It would make a good candidate rom the standoint of high compression,
 is is a three of four cylinder ?
 The injector pump could simply be removed and a  cover plate installed.
 As far as Solid-state timing and CDI spark, We could get "Real Fancy"
 with a PIC or Stamp, but really now, KISS (Keep It Simple Stupid), the
 most relable way would be a hall effect transister and a devide by 4
 counter (assuming that this engine is a 4 cylinder) the pulse train
 for the counter's clock cycle could be a second hall effect transistor
 counting flywheel teeth (the main sensor would be TDC or what ever
 basic advance you would want in the system.
 The Flywheel tooth sensor would be clocked by the teeth themself's,
 and a devide by "X" counter would count "X" flywheel teeth and then
 advance the devide by 4 counter for spark trigger.
 the entire SI conversion unit could be housed in a WP zinc project box
 (Hammond or equ.) and the hall effect transistors are available from
 most electronics supply houses or Woodward (used on the L or M series
 position controlers).
 The entire unit (trigger assy), NOT CDI or coil packs or plug
 conversions, should cost under 20 bucks, the rest would be in the
 100-250 area.
 Getting a set of injectors from the scrapyard would save on design
 cost of the sparkplug conversion, by using the spare injector bodies
 as the "meat" of the plug converters.
 Sparkplugs,  I would assume that a 1" (25mm) reach plug wold be required.
 Champion has a "find by type" application
 http://www.championsparkplugs.com/search_char.asp?threadSize=14mm&hexSize=&gap=&seatType=gasket&terminalType=&heatRange=&reach=25.4mm+%281%22%29&resistor=&action.x=44&action.y=14
 (watch for word wrap on the above)
 Greg
 On Thu, Aug 11, 2011 at 7:23 PM, GF <gfwhell at aol.com> wrote:
> Greg,
> I have an old complete Rabbit Diesel engine (early version).Do you think
> this would make a suitable candidate for conversion to "Wood GAS"
> for driving a 15kw alternator? If so what solid state ignition system
> should
> I substitute for the injector pump?
>
> GF
>
> -----Original Message-----
> From: Greg Manning <a31ford at gmail.com>
> To: Discussion of biomass pyrolysis and gasification
> <gasification at lists.bioenergylists.org>
> Sent: Thu, Aug 11, 2011 7:49 pm
> Subject: Re: [Gasification] Which engine design might be BEST for woodgas?
>
> Greetings Pete, and list.
> Large piston, long stroke (slow RPM),  many cylinder (8+), high
> compression engines, are the best Candidates
>  A 16 cylinder 1000 CID 15 to 1 Compression, 5" + stroke would be ideal.
> Caterpillar makes a Really Nice 3412. remove the injectors, double the
> headgaskets,  re-lash the valves for the higher head height, install
> SI unit in place of the injector pump... would be fantastic !!!!
> anyone got a cool 40 grand kicking around for the engine ??
> Greg Manning
> On Thu, Aug 11, 2011 at 4:54 PM, Pete & Sheri <spaco at baldwin-telecom.net>
> wrote:
>>
>>
>> Since folks are currently commenting on their favorite exotic engine,
>> maybe
>> it would be worthwhile to examine the whole field of “funny” engines that
>> have appeared and disappeared over the years as candidates for  the
>> unique
>> properties of producer gas/woodgas, etc.
>>
>>
>>
>> Of course, I have my own favorite funny engine, invented by the brother
>> of
>> a
>> co worker, but I will not burden you all with that one for now.
>>
>>
>>
>> There may even be some value in imagining a ground-up engine design that
>> would be IDEAL for our fuel.
>>
>>
>>
>> Pete Stanaitis
>>
>> ------------------
>>
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>>
>>
> --
>  Regards,
> Greg Manning,
> Brandon, Manitoba, Canada
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 --
  Regards,
 Greg Manning,
 Brandon, Manitoba, Canada
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-- 
Regards,
Greg Manning,
randon, Manitoba, Canada
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