Hi Bob,
Coking is caused by the reversion of CO gas back to CO2 and carbon soot,
where-by the hot gas entering the turbo is over a temperature of say
500C. If you were to first combust this gas with air so that only CO2
hot gas drove the turbo, the problem then becomes one of ash particle
impaction onto the impeller blades. Naturally you get heaps of waste
heat, but the practicalities of cleaning the impeller daily or after
each refueling is a real party pooper! The only safe way is to use
ceramic filter candles, expensive and needing compressed air to pulse clean.
Not sure maths is all that's required to make your idea work in the way
you perceive without adding energy. Steam and coke need the high
temperatures and pressures associated with turbo operation, but in
differing design application. I'm sure others will offer you comment to
develop this interesting concept.
Doug Williams.
On 03/01/17 12:56, Bob Stuart wrote:
Thanks, Doug.
I'd been worried about coking, so you have saved me a test setback.
Will a cyclonic separator upstream help? I've never dealt with
coking, so I don't even understand its vulnerabilities. Would a good
wire brushing with each new load of fuel do the trick? That could be
automated pretty easily.
All the ICEs have to deal with the power for a compression stroke.
I'll do the math on intake vs exhaust volume before building, of
course, to make sure the turbo efficiency is a minor fraction of the
equations. With a built-in air pump, a condensing flue is easy to
arrange, and it recaptures any heat used to burn wet wood. Would the
steam help clean coke? It eats carbon in an ICE.
From what I know about generators, a rapidly spinning magnet is quite
effective. Those little DC-DC voltage converters are surprisingly
small and efficient, running at very high frequencies.
Bob
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