On Tue, 27 Sep 2005, Byron A Jeff wrote:

> On Tue, Sep 27, 2005 at 10:07:14PM +0300, Peter wrote:
>>
>> I made a drawing and you can see it here (thanks to James for putting it
>> up - I have yet to learn how to use the piclist system):
>>
>> http://www.piclist.com/techref/member/plp-actcom-f00/sun-turbo-1.htm
>
> WOW!
>
> One element you are missing is the turbocharger lubrication system. You'll
> need an oil pump setup too.

You can think of it as being driven by the water pump.

> Can you describe where these items would fit using an example manifold?
> Here's a large image here:
>
> http://www.brit.ca/~tboicey/mgparts/pics/exhaust_manifold-1.jpg

That's a V6's manifold (one of the two). I will have to make a drawing 
and post it and then it might become clearer.

> So back to the all air installation... why is R a water radiator instead of
> another intercooler? Would it not be possible to simply immerse both
> intercoolers in a water bath?

The radiator has to remove a lot of heat from the turbine output. It may 
happen that a second turbine can be mounted at the output of the first 
to extract power. I do not know the exact data for this and it is hard 
work for me to predict what the thing will do anyway. I am just 
expanding an idea that does not seem to be more harebrained than other 
ideas that exist on this theme.

The radiator R would have to handle low pressure, low density air so it 
would have to be large anyway. Much larger than an intercooler.

I know that amateurs have built 'demo' gas turbines using such 
turbochargers, but in open circuit and with internal burners. I have 
looked at their figures and 'my' idea seems to be in the right order of 
magnitude.

>From my calculations (which are most likely incorrect) a smaller home 
type air conditioner heat exchanger (the kind mounted in a duct in the 
basement) is about the right size for this job.

> Will the generator also be the starter? So you supply electricity to get
> the setup going in the morning then extract power once it comes up to speed?
> There seems to be great symmetry in that.

There has to be something to start the turbine because the device will 
not start operating by itself. Using a motor-generator seems to be 
standard from what I read but not at 100k rpm. I have some experience 
over-revving home vacuum type motors in vacuum (2 in series + variac to 
raise voltage) and I did not like the end result (exploded/bent/welded 
motor rotor). That may be the hardest part to get by. But for a start 
jut making the whole thing work without extracting power would be nice 
imho. You get hot water anyway.

Peter
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