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Re: Buenijo post# 17776

Sunday, 08/01/2010 2:40:46 PM

Sunday, August 01, 2010 2:40:46 PM

Post# of 28186
Buenigo,

Sorry, been too busy at work lately to give a proper response to your reply on this one.

I am familiar with PEEK, it is used for the fittings on HPLC (High Performance Liquid Chromatography) equipment (I am an environmental lab guy too). A very interesting, tough, stable material indeed!!! Interesting to hear that they are using it for piston rings!!! It may just do the trick!!!! Ceramic piston coatings sound like a viable choice as well. The bearings are my biggest concern. Are they ceramic too, the bearings, bearing surface, perhaps PEEK riding on ceramic for the bearings? Is the PEEK in the bearing area a coating (that would be real interesting!!)? I have seen some cool stuff done with glass filled Teflon!!

Some references on PEEK:

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

Looks like graphite and glass filled PEEK might be even tougher than pure PEEK.

Thanks for all the great answers in your reply. They have brought me up to speed on many of the aspects of this critter, that I was trying to figure out!!!!

Keep in mind, while I have rebuilt a gas engine before (I have my own private fleet (LOL) of late 80's model Jeeps that I drive, one has an 82 Nissan Diesel, SD-22 engine transplant, that gets me 35 mpg, so I know how to wrench, LOL), and I was a cleaning equipment process supplier to turbine, gas, and diesel engine rebuilders in my youth, and I have a chemical engineering degree, and I practice chemical/environmental engineering, BUT I am NOT a mechanical engineer. Chem. Engrs. do not get the hard core engine/power plant mechanical engineering training that mechanical engineers get (you sound like an ME), so there are discrete gaps in my knowledge. Our (Chem Engr) specialty is reaction engineering. I know just enough to be dangerous in the ME field, LOL, when it comes to people trying to blow smoke up my a*s (LOL) about mechanics. So I really appreciate the clarity of your responses!!!!

I think the one exception to your last statement about Cyclone being the only one that can run with out "the addition of some exhaust gas treatment system", while quite true if it is using waste heat, or solar heat, may have one exception with the TTEG engine, as it claims to also be exceptionally clean burning, due to its low pressure combustion design. I have no data for either engine on the clean burning topic, so I will leave it at that.

On your questions about TTEG's engine (for comparison purposes, new engine tech versus other new engine tech like Cyclone's), it sounds like you already have an even better understanding of it's mechanics, comparison wise to Cylcone's engine than I do. Perhaps it would be more appropriate to discuss TTEG's design in more detail at the TTEG forum? But in answer to your question on the hybrid TTEG, I have no clue, but I am most curious to continuing reading your analysis of both engines!!!!!!

TTEG's totally unique (to me at least) and elegant design is what first attracted me to TTEG. It is a bit like a rotary Wankle, a bit like a centrifugal fan, no pistons, but has combustion cylinders like a piston engine would have, and the combustion force acts directly on the side of the blades, in the direction of rotation, and it is not quite a turbine either.

Then the wave of huge deals the last 12 months and JV partnerships in China and Japan, got me to invest there, not because I totally understand the mechanical engineering aspects as well as you seem to. One interesting thing about the TTEG is, they claim to be able to use fluidized powdered coal as fuel directly in the engine, and be able to burn it cleanly at a coal mine site in a 5000 HP generator design. They have a JV with a China firm to build and test one for generating power at a coal mine site in China. Looks to me like these two players have significantly different early stage market goals and applications. May be decades before they cross paths in markets applications.

I have no doubt, that you are right about the low end power, and torque issues with the TTEG versus the Cyclone engine. Lastly, I am not sure what you mean by a "parallel hybrid configuration" in your question, but it seems to me that most AC generators run at a fairly constant engine speed, even under little to no load???

I am also not sure what they mean by "hybrid electric power plant"????

I read earlier this week, something that surprised me. Seems the all electric Chevy Volt, is going to have a small gas engine generator, for recharging the batteries on longer trips!!! LOL

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