I just found a surplus dealer who's going out of business
who will sell me five 3 Phase motors for a song. They
are between 20 and 30 HP sealed outdoor duty motors.
perfect for windmills.
Of course I need to come up with the rest of the design.
I don't know anything about prop design, and I need some
kind of gear box, or can I use an easy belt & pulley, even
if it isn't efficient?
I was guessing 20 to 30 ft diameter prop, maybe three blades...
What do you think?
I had Electrical Engineering a long time ago, so I'm hoping I
can figure out the electrical circuitry. I know that this needs
a grid tie-in to excite the generator. But I suppose Bangor
Hydro won't make a grid tie-in easy!
I was thinking about using a drilled well casing for the tower.
Having a well drilled down 50 ft should be a good anchor. Put
one or two smaller diameter pipes inside to slide up and down
to be able to raise and lower the tower... Add some guy wires
for stability...
We're on a great sit for wind power, on a north/south ridge
on the Maine Coast. It'd be great to take advantage of it!
I'd be glad to share my generator windfall for help with the design!
Any help would be appreciated!
Thanks,
Jim Baranski
Shalom Orchard & Winery
158 Eastbrook Rd Franklin ME 04634
One bit of information:
- HP = 750 Watts so a motor designed to produce 20 HP could produce
- KW.
- HP = 750 Watts so a motor designed to produce 30 HP could produce
- 5 KW.
This is a nice size wind turbine for me; enough to produce more then
enough
power for the farm, but not too big to be unmanageable.
This ignores efficiency losses. A motor producing 20 HP requires
more then 15 KW
to produce it. So is a motor (acting as a generator) being pushed by
20 HP is going to
procude less then 15 KW. Can it be overdriven enough to produce more
without doing
a melt-down?
Jim
www.redrok.com/cimtext.pdf
Implies that 500 Watts per Horsepower is a better expectation.
That gives me 10 KW electrical power from a 20 HP motor.
That gives me 15 KW electrical power from a 30 HP motor.
Not too Bad...
The above document also gives the circuit diagram for connecting the
generator's
9 leads to a delta of large capacitors. Three points are also
indicated where 110 VAC
can be output.
I will attempt to post the file to the group file library.
Jim.