[Gasification] water gas and IC Engine exhaust gas temperatures

[Ken Boak]

Doug,

Thanks for your reply.

I just wanted a ball park figure so that I can understand how much heat
might be extracted from the gas in the cooler/filter/scrubber, before we get
to a temperature suitable for feeding into a diesel engine.


regards,

Ken


----- Original Message ----- 
From: "doug.williams" <Doug.Williams at orcon.net.nz>
To: "Ken Boak" <kenboak at stirlingservice.freeserve.co.uk>; "Greg Manning"
<a31ford at inetlink.ca>; "A Gasification" <gasification at listserv.repp.org>
Sent: Thursday, November 23, 2006 6:59 PM
Subject: Re: [Gasification] water gas and IC Engine exhaust gas temperatures


> Hi Ken,
>
> You ask:
>
> > Greg & List,
> >
> > Have you any figures for the temperature that the hot gas leaves your
> > gasifier.
>
> The outlet temperature leaving the gasifier is dependent on the radiant
heat
> loss from the gasifier casing, the diameter of the gas outlet, and, the
> design of the reduction zone,
>
> "IF" the gas making temperature at the point of beginning reduction is
about
> 12-1500C, and the reduction zone contains the correct amount of char, the
> gas should leave the reduction zone at around 850C.
> "IF" the reduction zone is supported on a char bed, then a lower
temperature
> will result, followed by radiation losses.
> "IF" the outlet size is very big, the gas outlet temperature is lower, and
> if smaller, will increases the gas temperature.
> "IF" all the above applies, then you should see the exit gas temperature
at
> around 4-600C, depending on the gas demand.
>
> I have made a big thing of the "IF's", because your question cannot be
> answered from one perspective, so the figures you receive to this question
> should not be used unless you are duplicating the same gasification
process.
>
> While this current thread of discussion is interesting, I do feel that
> producer gas as an engine fuel is still not understood. As the lowest
energy
> gas that can easily be made, it does not have the spare thermal energy to
> crack steam, or uncondensed gas moisture in the cylinder. Without
labouring
> the point, you cannot compare gasoline engine design incorporating heated
> inlet manifolds to make a gas that the air can oxidize, to producer gas,
> that has to be cooled, not to oxidize, but to reduce it's volume that has
no
> energy. Calculations are fine, but you have to play the game of
> gasification, before the score board can be read :-)
>
> Hope this Helps.
> Doug Williams,
> Fluidyne Gasification.