Martin I can find drawngs for a 9 inch spiral. What CAD systems you use?
--- In [email protected], "Martin.Leahy" <[EMAIL PROTECTED]>
wrote:
>
> Any body know whether I can get a set of drawings for a 9 inch
spiral tube
> Francis turbine?
>
> Thanks
>
> Martin
>
> -----Original Message-----
> From: Radu Babau - VARSPEED Hydro [mailto:[EMAIL PROTECTED]
> Sent: 07 March 2005 10:02
> To: [email protected]
> Subject: Re: [microhydro] Fwd: waste water discharge . . .
>
>
>
>
> Hello Ken,
>
>
> A rough calculation shows the opportunity to get ~150 kW output
power, using
> a Kaplan or propellor turbine.
>
> However, the discharge of a waste water plant is not always that
clean as
> you would like to believe. Those tiny suspension particles will make the
> turbine to clogg randomly, so it has to be cleaned quite often in
comparison
> with clean water turbines. There is also higher errosion due to
small metal
> and sand particles. This means higher general maitenance costs. One
simple
> idea is to reverse the turbine speed once a day, using a softstarter for
> instance. The water turbulence would contribute to rotor cleaning,
so you
> will have to seldom dismantle and clean it manually.
>
> Since you say the flow is constant, you could use a constant speed
induction
> generator, and a fixed pitch rotor. Things with moving blades will have
> higher chances to get gripped by the muddy water. Please choose
carefully
> the rotor characteristics.
>
> It's a feasible idea after all. There are experienced guys in the
group who
> could put you on the track for a good propellor supplier. The first name
> which crosses my mind right now is Peter Ruyter, www.cargo-kraft.se
>
> BR,
>
> Radu
>
>
> ----- Forwarded message from Ken Carman <[EMAIL PROTECTED]> -----
> Date: Wed, 16 Feb 2005 16:48:21 -0800 (PST)
> From: Ken Carman <[EMAIL PROTECTED]>
> Reply-To: Ken Carman <[EMAIL PROTECTED]>
> Subject: waste water discharge . . .
> To: [EMAIL PROTECTED]
>
> Our city has a large water treatment facility with a discharge that
has a
> head
> of 6 to 8 feet and a constant year-round flow of nearly 40,000 gpm.
Is this
> a
> good opportunity to persue putting a turbine on or not?
>
> Ken [EMAIL PROTECTED]
>
> ----- End forwarded message -----
>
>
> [Non-text portions of this message have been removed]
>
>
>
>
>
>
>
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