Re: H2 burner

On Jun 15, 6:12 pm, Robert Adsett <s...@xxxxxxxxxxxxxxxxxxxxx> wrote:
In article <ruydnUMWZuX1_8nVnZ2dnUVZ_q7in...@xxxxxxxxxxx>, Spaceman
says...

Robert Adsett wrote:
In article <6a-dnQmZIIJG28nVnZ2dnUVZ_h3in...@xxxxxxxxxxx>, Spaceman
says...
Heat engine?
Why?

It transforms heat from your fuel to mechanical energy.  That's a
definition of a heat engine.

Okee dokee,
no prob then,
Heat Engine it is.
but that still does not stop it from being better than
a traditional ICE.

It places a strict upper limit on the efficiency.  Now that you realise
you are dealing with a heat engine read up on elementary thermodynamics
and the Carnot cycle.  You will find what that limit is and why it is
what it is.

While doing a little browsing I found that this engine has existed since
the 1930's

http://en.wikipedia.org/wiki/Free-piston_engine

Apparently fairly efficient as a compressor.

Robert
** Posted fromhttp://www.teranews.com**

Yes, the pulse jet which I mentoined at first is a good comparable
analysis. A double acting free piston thats a powerful magnet, with a
coil surrounding it, is also very interesting -

http://www.sunpower.com/lib/sitefiles/pdf/productlit/Engine%20Brochure.pdf

SunPower in Athens Ohio, makes a Stirling version of a free-piston
engine just like this. They also make a refrigerator that's driven
by an AC source - a very compact, quiet device.

A four cylinder system consisting of two opposed free pistons is
nearly vibration free - whether used in stirling form or internal
combustion form. A great power source for a hybrid vehicle.

As in all heat engines the temperature differences between the hot
side and the cold side, determine overall efficiency limits, and
engine speeds displacement and so forth, determine power levels.
Peak temperatures are limited by metallurgical considerations as well
as environmental concerns such as NOx production. Bottom temps are
limited by heat transfer to the ambient environment and the size of
radiators and so forth needed to efficiently achieve that.

A tuned electromagnetically coupled free piston system that operates
at a constant power output - to drive an electromagnetic flywheel -
that then drives an electric motor equipped with regenerative braking
- is a system that has the potential to be very efficient when
compared to existing ICEs - even existing hybrids.

http://www.hybridcars.com/related-technologies/flywheel-hybrids.html
http://en.wikipedia.org/wiki/Regenerative_brake

Of course powered roadways that supply power to electric vehicles
(think advanced slot cars)

http://www.osti.gov/energycitations/product.biblio.jsp?osti_id=5200862

make vehicles even simpler and more powerful. With an adequately
designed roadway system we wouldn't need fuels batteries or flywheels
at all! Which is why the oil companies worked with the automobile
companies to buy up and put out of business the the street car
companies in America.

http://en.wikipedia.org/wiki/National_City_Lines

and why Europe still has a fabulous system of integrated trains and
street cars - and lower automobile ownership - and lower energy use
per capita.

http://en.wikipedia.org/wiki/Trams

When I go to Bern, I arrive at the airport in Zurich, take a cross-
country train that stops right at the airport, for Bern, and at the
train station take a tram that goes right by my daughter's house.



.

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