This reminds me that Kohler was doing something not long after I had left with 
“capstone” turbines.  Not sure of the significance, but I do recall the term 
being used.

I know they would have been relatively small units, if I recall in the 
10kW-15kW range.

They were talking at one time about producing them for use by restaurants like 
McDonald’s and Burger King to peak shave and provide hot water.

The projects I worked on that predated this were for the GE “Smart House” in 
Maryland.  One system we actually built and had operational there consisted of 
a three cylinder Yanmar diesel converted to natural gas running at 1200 RPM.  
There was a power management system using high current TRIACs that would allow 
the loads to be switched between the utility and the generator based on load 
balancing and peaks.  It was crude by today’s standards but worked well.  And 
the engine also produced hot water for domestic use through a heat exchanger, 

One unit we took out of service had over 12,000 hours on it without ever being 
shut down or taken offline.  It could have gone a lot longer.  The insides were 
almost like new.


> On Sep 11, 2015, at 1:45 PM, Curly McLain via Mercedes 
> <> wrote:
> Craig,
> You might find these interesting.  Jim Ettaro did many experiments with small 
> gas turbines using hydrogen as a fuel.  I saw his turbocharger air pump run 
> and I also saw the one in the second article run, and he had a third version 
> he built that I saw run. Each was quite interesting, and the startup 
> procedure did not appear that complex.  It would have been fairly simple to 
> automate start up and shutdown with Jim's designs, however making one of the 
> designs "failsafe" may not be simple.
> Video of his small hydrogen turbine used to be on the calstate LA website, 
> but I have not been able to find them for many years now.  I wish I had 
> downloaded and saved them.  However Virgil Seaman at Cal State LA may be able 
> to provide the video.
> Shhesh!  
> Okiebanz has lasted longer than Mercedes veterans or the Dickarde list.
> I would theorize that the small size of Jim's turbines and the hydrogen fuels 
> avoided some of the problems Grant and Dan encountered with larger versions.  
> What is called a Microturbine generator (like a capstone) is in the 30 kW 
> range, so is substantially larger than what Jim was dealing with.
> I don't remember what engine he got the turbocharger from, but it was similar 
> in size to the one on the 1.6L VW turbodiesel.  The final turbine engine I 
> saw (that Jim made) was about 5" dia also.
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