Coaxial generator development

RST Engineering wrote:

I'm just wondering if anybody has used either this scrap dump air to run a
wind driven generator, or whether any one of a number of ways of generating
electricity from heat has been attempted to convert waste exhaust gas into
excited little electrons? SOrt of a turbogenerator, if you will.

Jim


I remember one company making such a contraption as a drop down
emergency back-up generator. As I recall, the problem with using them
full-time is their horrible overall efficiency.

I'd be careful with anything that pulled energy from the cooling
airstream. Like Blueskies said, you gotta watch that you're not damming
things up. If you have engine cooling air leaving the airplane still
cool, the first thing you'd want to do is close up and streamline the
cooling intakes to reduce drag.

There have been some interesting developments with materials utilizing
the Seebeck (sp?) Effect recently. The new materials are driving the
efficiency up. I think the ultimate generator would be a
cylinder-head/peltier-cooler-in-reverse combination.

RST Engineering wrote:
or whether any one of a number of ways of generating
electricity from heat has been attempted to convert waste exhaust gas into
excited little electrons?

Lots of wind to cool around an exhaust pipe, and the rotary's exhaust is
noted for being exceptionally hot. Dang-it, Jim! Now you've got me
thinking again. Everytime I start doing that, by build time increases
by another three months.

Read this:

http://www.fieldlines.com/story/2005/11/2/31928/0770

RST Engineering wrote:

This may seem like a stupid idea, but good ideas sometimes come in stupid
clothes. In a normal air-cooled tractor engine, cold air comes in the
front, passes over and through the cylinders, and is exhausted through the
plenum chamber called the bottom of the cowl. Rapidly moving air, that
after it does it cooling job, is no longer of any use.

Remember back in dem halcyon days of the 50s and 60s we sometimes mounted
inefficient little generators on small pylons on the bottom of the airframe
and called them wind driven generators (the electrical equivalent of the
side-mounted venturi tube)?

I'm just wondering if anybody has used either this scrap dump air to run a
wind driven generator, or whether any one of a number of ways of generating
electricity from heat has been attempted to convert waste exhaust gas into
excited little electrons? SOrt of a turbogenerator, if you will.

Jim


The reason the air comes out the bottome of the cowling is because there
is a low pressure area there to pull it out.

Putting something in the way to hinder that flow might be counter
productive.


--

Richard

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