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Thanks for the suggestions Bob. At this point I'm
still in the learning process on steam generation, as I have an electrical
engineering background, with electrician and mechanic experience thrown in, but
none of it power generation related. Got some boning up to do on the whole
subject before I even start the design effort. It sounds like you might
have experience with this - got any suggestions as to some reading
material?
Thanks
Grant Schemmel
Grant,
It would depend on what the temp of the steam would be. At
atmospheric pressure 212 deg. and increasing in temp as the pressure went up,
you would have to remove the steam from the liquid to another pressure chamber
to be able to add heat to the steam (dry steam). This probably
would not be practical in this application. I am not sure what temp or
pressure your steam generator is capable of, but if it is capable of
temperature in the 500 deg range, the rotor would need cooling
The rotor uses the oil system for cooling so I would guess that maintaining
the side seals would be needed. Have you given any consideration as to
what you would exhaust the steam into? An air cooled condenser wold need
an extremely large area to cool the steam back into a liquid, where as a
liquid cooled condenser would be preferred. At some point a boiler feed
system would have to be developed to produce the pressure needed to deliver
the water back to the boiler, I would give consideration to using the engines
original cooling system to pre heat the boiler feed water, after it had gone
through the exhaust condenser. I have attached a simple drawing of what
my thoughts are on how the system might look. This system can become
fairly complex if you want automatic controls to maintain engine speed and
liquid levels, if you are just going to blow the steam away, all you have to
do is feed the steam generator.
Bob
--------------
Original message from "Schemmel, Grant" <Grant.Schemmel@Aeroflex.com>:
--------------
> Thanks Bob.
>
> Here's another
question - do you think that the oil system for the apex seals
>
would need to be maintained too?
>
> Grant
>
>
> -----Original Message-----
> From: Rotary motors in aircraft
on behalf of Bob Perkinson
> Sent: Sat 6/7/2008 1:31 AM
> To:
Rotary motors in aircraft
> Subject: [FlyRotary] Re: Steam engines
>
> With the lubricant emulsified in the water, the problem
comes at the steam
> generating device, be it a fired boiler or a
solar boiler, the lubricant will
> plate out on the steam generating
surface. Insulate the transfer surface and
> building up to the point
of reducing flow. Time to steam generator failure will
> b e
inversely proportional to the temp of the steam and the flow. Any impurities
> will produce scale in steam generators, so the H2o needs to be
pure, less than 3
> micro MHOs. I would go with ceramic seals IMHO.
>
> Bob Perkinson
> -------------- Original message
from "Lynn Hanover" :
> --------------
>
>
> Steam engines use with contained (reused steam) use water
based lubricants. No
> problem.
>
> Lynn E. Hanover
>
>
>
> Good point. I imagine you could use the
ceramic apex seals, but their
> cost would make the whole thing more
expensive than I would probably
> want to go. Do you think having the
seals coated with a ceramic might
> work/stay on?
>
>
Grant
>
>
>
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