Hello, I use polyethylene pipe, two in paralel. easy to install very resistant.
It's two 3'1/2 (89mm) for 20 metres (65.6feet) head and 300gpm (19 l/s) they are 250 metres long (820 feet) (3'1/2 is the internal diametre) There is two 100metres long and one 50metres, only two plastic junction per pipe. Why two in paralel ? because 3'5 is the standard in France for irrigation So i can have a good price, athought for unions, T ... Larger pipe are not very easy to unroll without a machine Not easy to transport too. For information 100 m of 3'1/2 is 150 kg weight And after 5" y can have only 6 metres long with solder end, not very easy to use (not impossible too) Regards Eric ----Message d'origine---- >A: [email protected] >De: Timothy Crawford <[EMAIL PROTECTED]> >Date: Sat, 26 Nov 2005 00:27:44 -0500 (EST) >Sujet: [microhydro] Penstock decision > >I am also a newbie, this being my first post. I would appreciate some >perspective on what would be the most sensible type of piping for a penstock >on my potential site. On my property is a small, year-round spring-fed creek >running at an estimated 100 - 300 gpm, depending upon amount of added flow >from local runoff after rains (...it rains a lot here in Western Washington). >I estimate the available gross head (I haven't surveyed it) at 60 ft. The run >of the penstock pipe would approximate 600 - 800 feet. I would like to extract as much AC production as I reasonably can from the site, as my state and utility encourages net metering, and my house uses a lot of power, even though I have installed geothermal heat pumping. > My question is this: the stream is in a fairly steep, heavily wooded > ravine, and the going is tough because of the irregular terrain and brush. > Because of the expected difficulty of installing and properly bedding a 4 or > 5" PVC pipe, I wonder if (1or several) 2" or larger polyethylene pipe(s) > would make sense instead. I am afraid that the joints on the PVC could fail > from the stress of the uneven terrain. Since freezing isn't an issue, I > think poly pipe could just be laid on the ground (with necessary tethering). Would this be more appropriate given the difficulty of the terrain, or would PVC be cheaper and acceptably rugged? > Thank you so much for your advice. >Respectfully, >Tim Crawford >Montesano, Washington, USA > > > > > >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! Groups Links > > > > > > > > ------------------------------------------------------------- NetCourrier, votre bureau virtuel sur Internet : Mail, Agenda, Clubs, Toolbar... Web/Wap : www.netcourrier.com Téléphone/Fax : 08 92 69 00 21 (0,34 TTC/min) Minitel: 3615 NETCOURRIER (0,16 TTC/min) ------------------------ Yahoo! Groups Sponsor --------------------~--> Fair play? Video games influencing politics. Click and talk back! http://us.click.yahoo.com/u8TY5A/tzNLAA/yQLSAA/FGYolB/TM --------------------------------------------------------------------~-> 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! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/microhydro/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
