One of the hidden advantages of the rotary is you can use an old
fashioned large diameter super charger directly on the e-shaft.
The classic direct drive low RPM aircraft engine required a
step up gear box between supercharger and crankshaft. No gears
required at all. Simple and very reliable with no wear points.

If turbo compound the blow down turbine is now divorced from the

compressor.

This is the configuration used by the CW R3350 TC.

Paul Lamar

Keith Moore wrote:

Paul:

Another thought;  use the exhaust turbine (90,000 rpm) to direct drive a two
pole generator and rectify to DC electric power.  Then power a DC electric
motor/generator connected to the rotary shaft (direct or by belt)

Perhaps you have seen Capstone located in Chatsworth?  Very interesting
tour!

Capstone Turbine was started by a couple of out-of-work engineers who
configured a Garrett turbocharger connected to a rotating magnet.  They then
added "air-bearings" (no lube and no wear), a burner and heat recovery HX.

Voila! - 30 KW at +30% efficiency, and very low emissions.
http://www.capstoneturbine.com/technology/techUnderHood.asp

Regards,

Keith Moore
LEZ

When you run the numbers it does not look that great 29 Kw = 39 HP
2.9 gallons per hour diesel fuel. BSFC = .56.
You are not done yet. You have to convert that electrical energy back
into mechanical energy. 80% motor efficiency is 31.2 net mechanical HP out
BSFC now goes up to .70. A rotary is one heck of a lot more efficient than
that. To top it all off the weight is 225 pounds for eng/gen and 151 pounds
for the controller for a grand total of 376 pounds and we still have not
weighed the electric motor. So typical of hybrid cars.

The last fly in the ointment is there are no details on the all important
recuperator.

Stock scam time.

Paul Lamar

I think we would do better to drop the second alternator and get the
primary electric supply from the electric motor in the electic assist
turbocharger..  It can supply all the load we need? If so, and the other
alternator were connected to the e-shaft like the motorcycles do ( maybe
a generator with the PM on the e-shaft ) , we've
have no friction lose from turning the spare alternator...

-dave

Now you are talking.

Paul Lamar
 
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