Steve:
Turgos turbines are made in several forms and the efficiency varies depending on
the bucket form.
Some have the "buckets" made with tube cut sections which do give poor
efficiency, these are not buckets but blades which when the water hits way from
the 90 degrees point starts losing efficiency.
Turgos with high efficiency have the buckets formed in a shape that we could say
that look like a tablespoon with one side straight where the jets enters to hit
the spoon.
The best efficiency Turgos have the buckets formed with an elliptical profile
which allows the maximum transfer of energy of the jet hitting the buckets
throughout the full angle range of the jet also the top of the elliptical
profile is cut in a well defined curved profile to maximize the jet distribution
between more than one bucket at the same time.
Joe Hartvigsen Turgos are one that have elliptical buckets, therefore one with
the higher effiiencies. reason why I suggest them.
to determine what type of turbine can be used, one needs to have all the site
parameters, like head, water volume, pipe length --
Systems with Turgos are easier to build because the turbine shaft can be
installed directly to the generator shaft therefore reducing the use of ball
bearing already available in the generator.
Peltons do require at least two extra ball bearings and the coupling to the
generator.
Nando
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