[Gasification] Low Calorific Gas for Stirling Engines

[Steve Carroll]

Quasiturbine engines. 
http://auto.howstuffworks.com/quasiturbine.htm
It can use diesel.

I don't really see why one would compare a Stirling
engine to a Rotary engine.  I don't know what the big
fuss is about Stirling engines anyway.  It seems like
such a wasted effort to try to produce so much energy
with air when you could be using a refrigerant and
taking advantage of the energy released during phase
change.  I also don't see why you would want to bother
with complicated displacement type stirlings.  It
seems to me that you could use a regular steam engine
where the exhaust ports are piped to an evaporator
coil in a closed loop system.  I think there is also
something called a Rankine engine which uses
refrigerant.

Anyway, sorry for being a little off the subject there
but I couldn't pass up my little rant about Stirlings
(which I like very much actually).

Steve



--- Tom Reed <tombreed at comcast.net> wrote:

> Dear Jeff and All:
> 
> Diesel engines routinely hit 30% efficiency and can
> reach 40%.
> 
> Why struggle with Stirling development when with a
> little more push the 
> Wankel  Rotary engine might edge out the much more
> complex piston 
> engine.  According to Wikipedia,
> 
> "Many disadvantages of the Wankel engine have been
> solved in the Renesis 
> <http://en.wikipedia.org/wiki/Renesis> engine of the
> RX-8 
> <http://en.wikipedia.org/wiki/RX-8>. The exhaust
> ports, which in earlier 
> Mazda rotaries were located in the rotor housings,
> were moved to the 
> sides of the combustion chamber. This approach
> allowed Mazda to 
> eliminate overlap between intake and exhaust port
> openings, while 
> simultaneously increasing exhaust port area. Fuel
> consumption is now 
> within normal limits while passing California 
> <http://en.wikipedia.org/wiki/California> State
> emissions requirements."
> 
> Could there be a diesel analogue?
> 
> Could there be any advantage for hydrogen rich gas
> from biomass?
> 
> TOM REED     BEF
> 
> Jeff Davis wrote:
> 
> >On Sunday 06 August 2006 02:52 pm, Tom Reed wrote:
> >  
> >
> >>Stirling engines have always occupied the position
> of "always a
> >>bridesmaid; never a bride". 
> >>    
> >>
> >
> >I have read that a stirling engine could achieve as
> high as 30% efficiency in 
> >the real world. It seems that one could do that
> good with an IC engine if the 
> >same amount of money and engineering was applied.
> >
>
>************************************************************
> >
> >I plan on building a Bisschop cycle engine:
> >
> >-- No piston rings.
> >
> >-- No tight piston to cylinder tolerance. Primitive
> machine shop.
> >
> >-- No governor.
> >
> >-- 110 rpm
> >
> >-- No sticky intake valves.
> >
> >-- Lots of heat for cogen (that's where I plan to
> make up my efficiency).
> >
> >-- Maybe hard maple wood bearings (bio-bearings).
> Hey, it worked for Mercedes 
> >Benz.
> >
> >-- The biggie, it needs NO crank case oil. It can
> not have oil in the 
> >cylinder. So how does it get cylinder oil? Answer:
> tar in the producer gas. 
> >Think of it as a two-cycle engine where the
> gasoline is mixed with oil. 
> >Someone built one and it would not run on propane,
> it needs producer-gas.
> >
> >-- No spark plugs or distributor junk.
> >
> >-- No fuel injection junk.
> >
> >-- It faced the efficient Otto-cycle engine and
> still was vary popular because 
> >of it's simplicity and reliability. It was always a
> small engine. The 1/3rd 
> >HP was the most popular. They may have made a one
> HP. So Peter has me out 
> >powered and he doesn't need the extra by-product
> (heat) like I do so this 
> >engine is not for everbody.
> >
> >Hint: It would make a great engine to turn an
> agglomerator and the off heat 
> >for drying the fireballs.
> >
> >
> >Jeff
> >
> >
> >  
> >
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> 


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