Hi Nando, I know you guys are sharp so i thought i'd give you enough info without boring you with all the details....i believe i DID you you enough facts to help solve the question......i already know that with the largest nozzle installed the net head drops to 128 ft and with the smallest nozzle it is steady at 132ft.......this is established ... flow rates and pipe friction need not be calculated....actual test data tells the best story........the power available is irrelevant as optimal rpm is dependant upon pitch diameter and net head.......i'm not stupid i just am not well versed in optimal rpm calculations with regards to operating either side of curve peak........i tried to give everyone enough info to do the calculation without flooding them with minute details......i was just trying to be helpful and not take up everyones time.........mark
----- Original Message ----- From: "HYDRO" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Friday, November 18, 2005 5:06 PM Subject: Re: [microhydro] 6.0 inch Pitch Diameter Pelton > Mark: > > Net heads does not vary with the Nozzle size, net heads vary with the Nozzle > physical position and the water friction in the pipe ( which means water > volume fed to the Nozzle). > > You have not given enough data to define head and pipe friction. > Nor you have defined the power available. > > It seems that you have already done some calculations and/or know some facts > to your situation, therefore WHY don't you supply those points for analysis, > instead of placing everybody in a "FINAL TEST " condition. > > Most will refrain from replying to you. > > Nando > > > ----- Original Message ----- > From: "Mark Drabick" <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Friday, November 18, 2005 10:24 AM > Subject: [microhydro] 6.0 inch Pitch Diameter Pelton > > > > Question for Pelton Engineers/Users > > > > I have a 6.0 inch pitch diameter pelton wheel that i would like to use to > > direct drive an induction generator. The net head will vary between 128 ft > > and 132 ft depending on what size nozzle i use. Would i be better off > > direct > > driving a 1850 rpm generator or a 1225 rpm generator?.....i know neither > > one > > is optimal but i'd like to avoid the belts and pulleys > > hassle........Thanks > > for your valued insight.......mark > > > > > > ------------------------ Yahoo! Groups Sponsor --------------------~--> Get fast access to your favorite Yahoo! Groups. Make Yahoo! your home page http://us.click.yahoo.com/dpRU5A/wUILAA/yQLSAA/FGYolB/TM --------------------------------------------------------------------~-> Does your company feature in the microhydro business directory at http://microhydropower.net/directory ? If not, please register free of charge and be exposed to the microhydro community world wide! NOTE: The advertisements in this email are added by Yahoogroups who provides us with free email group services. The microhydro-group does not endorse products or support the advertisements in any way. More information on micro hydropower at http://microhydropower.net To unsubscribe: send empty message to [EMAIL PROTECTED] Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/microhydro/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
