I use a Delco Remy 24 V with a 12 cm p.c.d. Pelton, generating 550 W with 110 m head and 1.6 l/s. I threw away the internal regulator, use resistive field control to find the best output and a Xantrex C40 in current diversion mode. It charges a bank of Trojan T105s; I draw 220V from that with a Steca inverter.
Advantages: * widely available (also in generic replacements, spare parts, and in automobile disposal facilities), robust, relatively standard. * The radially mounted carbon contact springs tend to jump out when opening the case and sometimes get lost. Be sure to have a couple of those in reserve. This does not happen with some generic replacements which have tangential carbons and fixed springs. * In constant use with the internal regulator, the carbon contacts will last 3 to 4 months. With resistive field control (constant speed), about 9 months. Both bearings will need a yearly replacement. * Cost-effective and gets the job done. Definitely the way to go if you are short in time/money and/or in any remote place where spare parts can be a problem. Disadvantages: * VERY inefficient. Consider something else if you've got the time and/or the money, or if you're very short in water. * After some carbon and bearing changes you start whishing for something more "solid state" and brushless. you *might* find some metal works willing to machine a permanent magnet rotor for you, but this gets involved. Conclusion: my turbine II will be an triphasic induction motor used as a generator (needs some trials to find the right capacity of condensers across the phases), and either a transformer to step the output down to around 30 V and charge the batteries, or direct 220V output with an IGC (the latter hard to get here). MK El vie, 10 de 06 de 2005 a las 16:43, Earl Tilton escribi�: > I'm working on a very basic project with a friend of mine on his land. We > are contemplating a micro-hydro system and would like to know of any good > experiences people have had with various *easily obtainable* alternators. > We're considering automotive / heavy equipment but would like to know *in > layman's terms* what the advantages / disadvantages would be. > > Also, I saw a string on a person considering jetski turbines. How would this > work with a 12month 3'-wide creek in the mountains of N.C. USA? > > Regards, > -- E.R. Tilton > ----- Original Message ----- > From: Radu Babau - VARSPEED Hydro > To: [email protected] > Sent: Tuesday, June 07, 2005 2:47 PM > Subject: Re: [microhydro] new turbines > > > Hello Mr. Ungureanu, > > Since I live and work in the country which seems to originate you as well - > Romania - I must urgently disqualify your feeling ("looser into the cold > war") as not real at all. Moreover, my personal impression is that your > skills in making war charges and missiles makes no relevance to the group. > Please notice that all the people who are placing here some of their small > or great ideas and concerns are trying to build things, usually out of > nothing, which is something indeed. > > I wish you all the best with promoting your "ultimate step into the field > of > turbines" equipment. > > Have fun, > > Radu Babau > > > > > > > > > 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 > > > > > > > [Non-text portions of this message have been removed] > > > > > > > > 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 > > > > > > > > > ------------------------ Yahoo! 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