Way remote power part 2 - Page 3

 

I think silicone will do this job just fine.


Ok, update.....

I spent a good 4 hours studying the design math and theroy of the
banki turbine, and I am now at point where I need to figure out
optimal dia for the end disks.  Im going to construct a 12" X 3.3" for
now, just to test things out.  Once I get a running turbine, I will
refine the math, and go for a smaller turbine tuned for the actual
measured flow.  Who knows.  the 12" might do just fine.  I would
rather have a 8" turbine that turned much faster than a slow-high
torque turbine.  Im still debating this.  I did the layout of the
endplate, and cut the buckets for the 12".  Now I need to do some
fancy cuting to get the end disks slotted for the buckets.  I think
that the nozel will be a bit difficult since the turbine will be
narower than the pipe feeding it, but I think I can manage. The plan
is to use a 3" X 3" square tube to fabricate the nozel from. If any of
you out there have any experiance building a banki turbine, I would
love to share my thinking with you and swap notes.

 
This sounds like an interesting project. What do you have for machine
tools?

 

  Odd values there.

  From my pocket ref:

Using "the Hazen-Williams equation for flow in pipes".
"Feet of Head Loss values are subject to the following
conditions:
a) Pipes carrying clear water at approximately 60 F (15.6 C).
b) Pipes are flowing full.
c) Velocities of water are generally less than 10 feet per second."

For "New Clean" Steel or plastic pipe:

"Head Loss/100 Feet Pipe Due To Friction"
4" Diameter Pipe:
at
30 GPM = 0.1'
40 GPM = 0.1'
50 GPM = 0.2'
60 GPM = 0.3'
70 GPM = 0.3'
80 GPM = 0.4'
90 GPM = 0.5'
100 GPM = 0.7'

150 GPM = 1.4'
200 GPM = 2.4'
250 GPM = 3.6'
300 GPM = 5.1'
400 GPM = 8.6'
500 GPM = 13.0'
600 GPM = 18.3'
700 GPM = 24.3'
800 GPM = 31.1'
900 GPM = 38.6'
1000 GPM = 47.0'
1200 GPM = 65.8'
1500 GPM ™.4'


Luck;
    Ken

 On Mon, 27 Oct 2008 03:35:11 -0500, "Ken Maltby"



Ken  - thanks for the numbers. I have just been reading some info
about the Hazen-Williams equation and downloading some nomographs.

My figures are in about the same ballpark as your pipe-loss numbers
above - though I agree, I used "mixed" odd units.
However, 10 litres per sec is about 10 x 60 / 4.5 gallons per min =
133 gallons/min. From your table, this incurs a loss of somewhere
approaching 1.4 ft/ 100 ft ( I guessed about 2 - but I tend to err on
the high side, because few pipelines are ideal - eg bends etc).
Interpolating from your table, 2ft/100ft is closer to 170gallons per
minute, or about 12 litres per sec.

But its good to see some other tables.

Thanks

Eric Sears.