OK, 352 GPM sheds some light on the subject. That is a lot of water, almost 6 gallons every second. I'm an electrical engineer, not mechanical so I'm not sure of all the equations but that makes more sense.
PM me with your phone and/or email and we can talk about me getting in touch with Tony off the board. I don't want to cast un-necessary doubt on the project because at this point I'm sure they must know what they are doing. On the other hand changing the specs drastically just before production does cast its own doubt.
Equation #7 in that link I posted earlier shows that at a flow rate of 352 GPM and a pressure of 50 psi (converted to 115' of head) ignoring frictional losses and assuming 100% efficiency the test setup could generate 10.23 hp or 7.6KW. Therefore 4 slices could produce about 40hp or 30KW so it seems to me that they could not reduce the input pressure unless they increased the flow.
Blockman, was the input to this system the 3", 5" or 6" pipe? Notice that does not enter into this equation.
This isn't my direct field of knowledge but those numbers sound about right to me. I'll try thier engineer tomorrow and ask more about the applications.
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