|How about HP?|
Looking at a chart in the book of capacities of Hunt-Francis turbines with the 7,560 cu.ft. water a minute we find that we could get 74.41-hp with a 36-in wheel and 12-ft head – requiring 3,992 cu.ft. min ..
but .. the casing that the turbine sits in is approximately three times the dia of the turbine wheel (or .. maybe not. See the bit later on the exterior mounted turbine). For a 36-in wheel that means a casing 9-ft in dia. .. and that for a horizontal mounted turbine .. it would be 4-1/2 feet from the shaft to the floor. That would mean that instead of 12-ft of head we would have 12-4.5 or 7.5 ft. of head. That would reduce our hp to around 37-hp.
What if we used a 24-in wheel? That would require a 6-ft dia casing or 3-ft from shaft to floor and leave us with a 9-ft head – and give us 22.24-hp.
Thing is .. the pump-house is already made. I have about 8-ft height in the lower section to put the turbine wheel and generator etc. inside. That would seem to restrict me to the smaller wheel and 22+ hp.
|Once I had the dam created in Sketchup I could print off the various bits and glue them to some .040″ Styrene using one of those glue sticks. Nice thing about that is warm water dissolves the glue leaving you with your own personal ‘kit’.|
I couldn’t find my model putty so I grabbed some automotive spot putty. Works just as well far as I have ever noticed.
Still have to add the radius at the bottom.