Any time the water carry heavy debris, for the life of the Turbine, it is necessary to put a "FILTER".
Some of those filters are the"desanders tanks", intake filters and so on. So the water carrying shale needs to be allowed to rest long enough to permit the water to deposit the material as a sediment in the desander tank. ALSO it is necessary to have a way for periodic desander tank cleaning by either manual labor or the water it self washing the debris to a side escape. One, we made, had a desander tank feeding another tank or reservoir to allow the turbine operation during the desanding cycle because the water was re-routed to a lower pipe to expel the sand and small debris carried by the stream that was fed by a river several kilometers away all the way via underground tunnels or caves. In this case, the desander was run every Sunday in the early hours, always keeping the water clean, Also a fish trap was used to avoid fishes been drawn into the turbine pipes. Regards Nando ----- Original Message ----- From: "Frank Leslie" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Wednesday, October 13, 2004 12:45 PM Subject: RE: [microhydro] I have a stream flowing through my yard, what can I do with it? > > > Uhhhhh! Shale is rock and doesn't float. > > "A fissile rock composed of layers of claylike, fine-grained sediments." > http://dictionary.reference.com/search?q=shale&r=67 > > Is the shale small bits swirling in the water? A stilling basin would allow > it to separate. > > Frank Leslie > > -----Original Message----- > From: Carlos Bonifetti [mailto:[EMAIL PROTECTED] > Sent: Tuesday, October 12, 2004 6:00 PM > To: [EMAIL PROTECTED] > Subject: Re: [microhydro] I have a stream flowing through my yard, what > can I do with it? > > > > Dear Lawrence, > > If shale is similar to oil and floats over the water, the solution would > be a concrete or steel tank with enough area for low velocity in the > outgoing stream, up waters from the forebay, with a separation plate for > catching the floating shale and take it away by means of a syphon or some > other device. > This idea together others could help you in find the best problem solving. > > Regards, > > Carlos Bonifetti > ------------------------------------------------------------------------ -- > - > ----- Original Message ----- > From: Dennis Buller > To: [EMAIL PROTECTED] > Sent: Saturday, October 09, 2004 12:54 AM > Subject: Re: [microhydro] I have a stream flowing through my yard, what > can I do with it? > > > > > ----- Original Message ----- > From: Lawrence Balisky<mailto:[EMAIL PROTECTED]> > To: [EMAIL PROTECTED]<mailto:[EMAIL PROTECTED]> > Sent: Thursday, October 07, 2004 3:19 PM > Subject: FW: [microhydro] I have a stream flowing through my yard, > what can I do with it? > > > > My stream has large amounts of shale that comes out of the mountain. > Can > anyone direct me to advice on different intake designs that best > handle > shale as I am still trying to estimate the cost of this project. > > > > Thanks, > > Lawrence Balisky > > Dear Lawrence, > With an overshot wheel, shale would not be an issue. I am not sure > what your situation is, but it is something to think about. > Dennis > http://WildWaterPower.com<http://wildwaterpower.com/> > > [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 Sponsor > ADVERTISEMENT > > > > > > ------------------------------------------------------------------------ -- > ---- > Yahoo! Groups Links > > a.. 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