Willy, Nando, all: OK. Concepts below are a good advice. Willy: Take in account that one turbine set is cheaper than two of half power. Flexibility operation flexibility will be considered for the scheme choice, one or two machines. I think that 3 machines must be discarded. Regards, Carlos --------------------------------
----- Original Message ----- From: "Nando" <[EMAIL PROTECTED]> To: "HydroPower Forum" <[email protected]> Cc: <[EMAIL PROTECTED]> Sent: Wednesday, June 01, 2005 1:18 PM Subject: Re: [microhydro] 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] --------------------------------- D�couvrez le nouveau Yahoo! Mail : 1 Go d'espace de stockage pour vos mails, photos et vid�os ! Cr�ez votre Yahoo! Mail [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! 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