> I'm not sure if that's a joke or not. I realize that the water which
> has fully reached the top will not backflow since it is lower than the
> end of the screw. However, any water inside the screw will flow back
> down into the lower pool if the screw speed is insufficient to keep up
> with the pull of gravity on the water. Am I missing something?
> =

> On Thu, Jul 8, 2010 at 9:03 PM, John Gardner <goflo3@gmail.com> wrote:
> > What backflow? =A0 :)

It's not a joke, as for most of the screw the water does not cover the scre=
w, so the water cannot backflow. If the screw is made as a channel with an =
open top (see the pictures in the links I posted previously about power gen=
eration using a screw) then the only backflow is when the water overflows a=
 turn of the screw.

There will be a trickle backflow due to an inevitable gap between the screw=
 and the channel, but careful design would make this reasonably minimal.
-- =

Scanned by iCritical.

-- =

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