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Posted by on February 14, 2004, 1:34 pm
 
How mutch power will a turbine made of ten discs (the sise is 12
inches) with a spacing of 0.0300 develope? I altso need the dimentions
for a unit developing 15KW electric. I am planning to power these of a
waterfall, the pressure will be 180 Psi. How many liters per minute
will it need?
 Håken Hveem Norway



Posted by Nick on February 28, 2004, 6:45 am
 
wrote:


At what RPM?  

Tesla made a disk turbine of (I think) 9 disks 1/16" thick and 12"
diameter that developed 110 horsepower for a few hours at (I think)
9,000 RPMs.  The disks were made of Monel (I don't know which grade.).

He got a little deformation though so he should have limited
horsepower to about 65 or 70 hp for long life reliability.


Anything large enough to be efficient and not be made out of super
high strength alloys to achieve huge RPMs should be large enough.

10 to 12 inch diameter and 8 to 10 disks should be great.


You don't plan to run water through a disk turbine do you?  Disks will
pump water fine if driven by a motor, but you don't get power from it
efficiently at all.  

Disk turbines only become efficient at about 6,000 to 16,000 RPMs.
(Smaller diameters require higher RPMs.)  Liquids would never allow
for that high of RPMs!




--
It is no wonder that grown men, either perplexed in the
necessary affairs of life, or hot in the pursuit of pleasures,
should not seriously sit down to examine their own tenets;
especially when one of their principles is, that principles
ought not to be questioned. --John Locke

Posted by on February 29, 2004, 2:27 pm
 


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