Hellow Nando,
Very clever the point of view of your cousin. In that history case below, I said the customer that he must put a wire mesh protection in the existing rectangular opening at the side of the forbay, behind the trashrack, for stop flat and round stones inflow to the penstock, but perhaps he did'nt....... the runner arrive to our works yesterday with 3 blades less! Now we are at repairing task. Regards, Carlos ------------------------------------------------------------------------- ----- Original Message ----- From: "Nando" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Friday, January 21, 2005 6:33 PM Subject: Re: [microhydro] High Specific Speed Impulse Turbines? > > > 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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