Himani
The big advantage to me on my site is the ability to
shut the system down with no water pressure in the
penstock. This is important if you need to shut the
system down in the winter where freezing temperatures
could damage the pipe. It is also important for repair
of the penstock which can only be done with the pipe
drained.
Peter Allen
--- [email protected] wrote:
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>
> There are 4 messages in this issue.
>
> Topics in this digest:
>
> 1. Re: Re: Mini Hydropower Plant
> From: "Nando" <[EMAIL PROTECTED]>
> 2. Re: Mini Hydropower Plant
> From: "oso954" <[EMAIL PROTECTED]>
> 3. RE: Re: Mini Hydropower Plant
> From: "Dan"
> <[EMAIL PROTECTED]>
> 4. Gates/Valves at top of penstock
> From: himani goyal
> <[EMAIL PROTECTED]>
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
> Message: 1
> Date: Wed, 1 Jun 2005 12:18:04 -0500
> From: "Nando" <[EMAIL PROTECTED]>
> Subject: Re: Re: Mini Hydropower Plant
>
> Willy;
> Carlos said the S turbine, which is a Kaplan -
> Simplified.
>
> It probably be cheaper to have two - 1 MW each so
> one will be standby and
> the definition of what is best, it is, STILL, too
> early to say.
>
> I suggested 1 meter minimum ( rough and fast
> estimate) and it may be more
> 1.2 or 1.5, specially if in winter times you want to
> have additional energy
> available and in this case utilizing both generators
> ( with frequency
> synchronization).
> Planning for future expansion is a MUST if properly
> planned; the site could
> be made to produce much more if the idea of a
> reservoir ( lake ) is
> implemented and planned.
>
> The Turbine type will depend on the site, efficiency
> and cost of each.
>
> If you need a minimum power generated, make sure
> that the storage area
> allows that during the summer months.
>
> Did you consider the transmission and conversion
> losses in the equation for
> the required minimum power ?.
> Depending on the area, transmission distance, load
> locations, Power Factor
> of the loads and some other points the 1MW may
> require additional 20 to 30
> % generated power.
>
> Regards
>
> Nando
> ----- Original Message -----
> From: "Willy Mwamba" <[EMAIL PROTECTED]>
> To: "HydroPower Forum" <[email protected]>
> Sent: Wednesday, June 01, 2005 2:12 AM
> Subject: [microhydro] Re: Mini Hydropower Plant
>
>
> Dear Nando,
> Dear Dimitar Partenov,
> Dear Carlos,
> Dear all,
>
> Thank you very much for your feedback. It is clear
> that the project is
> complex and huge. It requires a complete study by a
> team of specialists. My
> group is presently in a process of writing a
> preliminary report that the
> Ministry of Energy of the Democratic Replubic of
> Congo will use to convince
> some financial donors to finance the project. Your
> contribution is and will
> be appreciated in that it will help us prepare this
> preliminary report.
> Bear with me. I still have plenty of questions to
> ask but let me do it by
> steps.
>
> Nando suggested a Francis turbine and a penstock of
> 1 meter diameter.
> Dimitar suggested a Kaplan or a propeler turbine
> with siphon intake and a
> penstock of 1.2 m.
> Carlos suggested instead an axial "S" type turbine.
> I did a bit of search on turbines and indeed all
> these turbines types fall
> in the category of turbines that can be use for this
> head and flow ( H: 15m,
> Q: 10m�). I know that through your experience you
> have reasons behind your
> selection.
> I want to know the advantages and desadvantages of
> using the type of
> selected turbines.
> Since I want to have a spare unit also installed.
> Will it be cheaper to have
> only one big turbine and a spare turbine or 2
> running smaller turbines and a
> spare one?
>
> To run all the industrial machineries that are
> planned to be installed,
> almost 1MW of power will be needed. That is the
> reason why the selection of
> turbines and generators must be so as to give at the
> other end a 1MW power.
>
> Thank again for your willing to help
>
> Willy L. Mwamba
> [EMAIL PROTECTED]
>
>
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________________________________________________________________________
>
________________________________________________________________________
>
> Message: 2
> Date: Wed, 01 Jun 2005 23:06:26 -0000
> From: "oso954" <[EMAIL PROTECTED]>
> Subject: Re: Mini Hydropower Plant
>
> Willy:
>
> You should not be writing a preliminary report for a
> hydro-electric
> project.
>
> You should instead be writing a preliminary report
> for a Power
> System. In it, you can identify that you have
> industry loads of about
> 1000kW and an undetermined amount of rural electric
> needs. You can
>
=== message truncated ===
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