Dear Sir (eric)? Thanks a lot for your help, I have already e-mail it, hoping to get reply form them soon Best Regard, T.Hedy Hartoyo -----Original Message----- From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Wednesday, October 05, 2005 1:13 AM To: [email protected] Subject: Re: [microhydro] RE: Need information to buy weather proof 24VDC-200watts genera Hello,
Try : http://www.cismac.com/index.html They make turbine for the application you think (i have no link with us, i am just French to !) Best Regard, ----Message d'origine---- >A: <[email protected]> >De: "T.Hedy Hartoyo" <[EMAIL PROTECTED]> >Date: Wed, 5 Oct 2005 20:18:08 -0700 >Sujet: [microhydro] RE: Need information to buy weather proof 24VDC-200watts generator > > > >My name is Hedy from Indonesia and very new to this, I am interested to >micro hydro and start learning about it. >One of the idea after joining this group is designing a small turbine to >run an 24 VDC generator for driving a control valve for remote >application. I have 3 inch pipe diameter with 10 ft/sec velocity with >750 psig pressure >I am thinking to put a small s type turbine in an elbow with qualified >mechanical seal and couple the output shaft to the generator. >My question is where I can buy this kind of generator, and what is the >minimum rpm I can run to get 24 VDC? And what is the price? >I need it for outdoor application,( weatherproof or TEFC type) >Thanks a lot for helping me > > >Best Regard, > >T.Hedy Hartoyo >Engineering & Construction >Director > >PT. Saran Tunggal >Jl. TB.Simatupang No.57 >Jakarta, 13760 >Telp. +62 21 8779 5456 >Fax. +62 21 8779 5379 >E-Mail. <mailto:[EMAIL PROTECTED]> [EMAIL PROTECTED] > [EMAIL PROTECTED] > >-----Original Message----- >From: [email protected] [mailto:[EMAIL PROTECTED] On >Behalf Of Manfred Mornhinweg >Sent: Monday, October 03, 2005 2:39 PM >To: [email protected] >Subject: [microhydro] Re: generator = motor ? > >Hi, > >> Can electricity produced from a spinning wheel (a water wheel for >> example) via a generator go in reverse? > >What do you mean by "going in reverse"? Turning in the sense opposite to > >the normal one? Most generators will work fine that way, but not all. > >> More specifically, if >> electricity were applied to a generator, would it spin the wheel? > >This too depends on the kind of generator. Many will work as motor, but >at reduced efficiency and often with severe limitations, such as not >being self-starting. > >Generally speaking, it's best to use a machine for the purpose it was >designed. Given that both motors and generators are easily found >commercially, I don't see such big sense in reversing their functions, >except for fun and experiment. > >> Also, where can I find an easy "recipe" for making a generator for >> water flow or wind? > >If your machine falls into a power class for which you can find >ready-made generators, it's usually best to buy one. Car alternators are > >cheap, widely available in many sizes, and are solidly proven >technology. They cover the range from about 200 to 1000 Watt. Above that > >power level, alternators for 220 or 110V are abundant and of reasonable >cost. Only below the 200 Watt level could it make sense to build a >specialised generator. That would usually be done with permanent magnets > > on the rotor, and coils on the stator. There are countless different >mechanical arrangements possible. The output from the coils would be >rectified with diodes and used to charge batteries. Regulation would be >done with a circuit that switches in a load, or that disconnects the >generator, or that regulates the current from it, when the batteries are > >full. > >Manfred. > > >---------------------------- >Visit my hobby website! >http://ludens.cl >---------------------------- > > > > >Does your company feature in the microhydro business directory at >http://microhydropower.net/directory ? 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