RE Steinaman in CT.
Hi,
I too will be interested to see what advice comes to you from the group.
Here in Maine I live adjacent to an old mill pond whose dam is jointly
maintained by the town and State dept of Inland fisheries & game (their
interest is in waterfowl nesting). Although my town endorses my idea of
tapping the dam for a hydro scheme, I have gotten a very cold reception from
the State�so far.
However that is beside the point. You don�t say how you plan to use the
power generated... is it for weekend use or everyday to recharge batteries
or to reduce your bill from the power co.?
The sawmill that was here in the old days needed a lot of power for perhaps
8-10 hours a day so they had a relatively large impulse turbine which over
the day drew down the pond a few feet.. but overnight it would refill. This
kind of option could be useful to you if you didn�t require 24-7 power
because you might design for a somewhat larger turbine and possibly avoid
the cost of a large battery.
I am sure that the engineers will emphasize the necessity of a design that
keeps the penstock always full. But my modest suggestion is that you should
design a separate weir at the top of your dam to supply the penstock. Why?
Because you could really screw up by messing with your present spillway. As
you must know, your overflow must work perfectly in times of heavy rains or
the dam could be wash out.
A simple solution is to drape a large pvc (flexible) pipe over the the top
of the dam and down to your turbine and run it as a siphon.
Chris
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