-------------- Original message from "Dennis Buller" <[EMAIL PROTECTED]>:
--------------
Hello.
Just a quick question.
What should the angle of the paddles be for a undershot waterwheel?
Thanks
Dear Rod8kor,
I have to dig up a book to answer the question, but while I am figuring
out where it is, you may find this site interesting:
http://aquamor.tripod.com/Wheel.htm<http://aquamor.tripod.com/Wheel.htm><http://aquamor.tripod.com/Wheel.htm<http://aquamor.tripod.com/Wheel.htm>>
What is great about the melding of the undershot wheel and the spiral pump
is that the spiral pump creates pressure through rotating motion without any
moving parts!
I am currently working on a prototype that takes the pressure and runs it
through a turbine.
I will get back to you on the paddle angle as soon as I find that book.
One thing I must know is, is this an enclosed system (all of the water is run
through a chute through the wheel) or an open system ("run of the river").
Sincerely,
Dennis
Dear Dennis,
Thank you for checking into the paddle angle.
All of the water comes through a chute.At times it is quite turbulent in
front of the paddels. I have attached a photo of the old wheel.
Rodney
Dear Rodney,
I found the book "waterwheels" by the international textbook company
(1907!) and found that it is amazingly unhelpful.
It does give the impression that what you are trying to do is :
-Run the wheel at .4 the speed of the flow of the water. This is the best
balance between the motion creating work and having the water impact the
blades. Of course I remember reading another book that stated 2/5ths was the
best.
-The point of angling the blades is so the water rides up onto the paddles,
imparting all of its impact onto the blade-without wasting it through
turbulence.
I am sorry I have not actually answered your question, but I am leaving
for Minnesota tomorrow morning and have to get ready. When I get back in a
week, I will try and find the answer.
Sincerely,
Dennis
Dear Dennis.
Any luck on the paddle angle. I am guessing that it might be around 4 degrees
from vertical.
Thanks,
Rodney
[Non-text portions of this message have been removed]
------------------------ Yahoo! Groups Sponsor --------------------~-->
What would our lives be like without music, dance, and theater?
Donate or volunteer in the arts today at Network for Good!
http://us.click.yahoo.com/TzSHvD/SOnJAA/79vVAA/FGYolB/TM
--------------------------------------------------------------------~->
Does your company feature in the microhydro business directory at
http://microhydropower.net/directory ? If not, please register free of charge
and be exposed to the microhydro community world wide!
NOTE: The advertisements in this email are added by Yahoogroups who provides us
with free email group services. The microhydro-group does not endorse products
or support the advertisements in any way.
More information on micro hydropower at http://microhydropower.net
To unsubscribe: send empty message to [EMAIL PROTECTED]
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/microhydro/
<*> To unsubscribe from this group, send an email to:
[EMAIL PROTECTED]
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
