[Gasification] Replacing fuel-oil with biomass

[doug.williams]

Hi Andy,

Thanks for taking the trouble to report interesting information, but can 
anyone
afford to add these systems to the smaller gasifiers?

>  Total engine control is the goal. Woodward Governor has gas-engine 
> control
> modules that will sense exhaust-gas oxygen, and trim excess-air at the
> mixer. Bias-fuel (rich mixture) is applied when accelerating, or not when
> slowing-down. The controller learns conditions in the cylinder to advance
> the spark event before top-center on the compression-stroke to achive
> highest cylinder-pressure at the best part of the power-stroke (a special
> microphone-thing listens for detonation). Turbo-compressor
> discharge-recirculation can also be controlled by one of these.

It sounds impressive, but I do believe a system like this would be 
challenged
using producer gas that can change calorific values in an eye blink :-)

>However,
> Woodward has no single-mixer body model specific for producer-gas.

Exactly!!!For the commercial need, this is the problem, but suppliers will
still tell you that it "should" work on producer gas. A recent purchase of a 
gas
control system, cost US12,000, and yes, it failed to perform, even though 
all
the specifications were supplied. The market needs are still too small and
wide spread for any supplier to really be interested.  Plus the fact they 
have
to first work with a reliable gasifier.

If anything at all, this question is a good sample of the difficulty that 
commercial
manufacturers experience to bring their technologies to market. Very little 
off the
shelf ancillery components just fit the job, and little is known about their
reliability untill you try and use it, then it's used, and they will not 
refund your
money.

Doug Williams,
Fluidyne Gasification.






 GLRF
> (systems) has a few conceps that need to be tested, and applied, but GLRF
> has only a gasifier that makes no tar and a V-8 that took the strain on 
> the
> harness like Grandpa's Clydesdale.
>
>  I predict crude-oil price to go higher before spring. Get busy, Weld some
> metal, cut some wood, Work hard, Git'er done!
>
> Andy Schofield
> Great Lakes Renewable Fuels
>
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