Hello Carlos:
Which clearly indicates that the water intake should be " filtered" to remove debris that may cause problems in the Hydro Turbine. Standard procedure done by my cousin that refused not to do it -- he preferred not to install the hydro if a proper intake protection was not implemented. -- he lost several contracts but several years later he was called to fix the problem on those contracts he lost. Regards Nando ----- Original Message ----- From: "Carlos Bonifetti" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Friday, January 21, 2005 3:44 PM Subject: Re: [microhydro] High Specific Speed Impulse Turbines? > > > Hi Rupert and Mark: > > Here I am again after my hollidays. > Rupert have reason about the generall lack of funds for innovation > projects, but fortunatelly here in Chile we have a governmental well > operating institution named INNOVA BIO BIO who provides funds for innovation > projects, only for our Bio Bio Region (VIII Region, Chile), and so I am > studying the presentation of a project for picohydro and local electronic > regulators production. > > About blades falling from cross-flow machines I had only one experience: in > a 25 kWe SKAT T-13 model working with a 20 m gross head, a flat and circular > stone about 35 mm diameter came in by the penstock and stay a few seconds > between 2 blades after "marking" some other 14 blades at the meedle, so the > runner became suddenly stop and one blade was cutted just aside de weld in > the external plate, in spite off the sloted disc constrution. The runner was > taked off and the damaged blade was replaced in our works. Owner goes on > again without any future troubles. > > Regards, > Carlos > ------------------------------ > > > > > ----- Original Message ----- > From: "H2MJD" <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Friday, January 21, 2005 1:34 PM > Subject: Re: [microhydro] High Specific Speed Impulse Turbines? > > > > > > > > Hi Rupert > > > > I"d like to learn more about your turbines. I tried to access the web link > > provided but for some reason couldn't get to the Impulse page. Any > > suggestions. > > > > Thanks > > Mark > > > > > >> I see that you have come across the project that I started about 15 > >> years ago. I came up with the idea precisely because of the problems > >> with 'pumps as turbines. If you know your hydraulic conditions, the > >> water is clean and nothing changes, I agree PAT is a perfectly > >> satisfactory solution BUT in the real world the site data is usually > >> wrong, the customers change their minds halfway through the project and > >> the water has 'rubbish in it'. The latter is difficult to remove. > >> The project produced a workable turbine and the concepts are embodied in > >> a new series of turbines that I now make. Unfortunately there is a great > >> lack of funds and investment for promoting new ideas and designs, so it > >> has all taken rather a long time to develop. So if anyone is fed up with > >> the blades falling out of their cross-flow, drop me a line! > >> Regards > >> Rupert Evans > >> Evans Engineering UK (Powerstream) > >> [EMAIL PROTECTED] > > > > > > > > > > > > > > > > Does your company feature in the microhydro business directory at > > http://microhydropower.net/directory ? 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