Hi Nando, Tuesday, July 27, 2004, 4:16:15 PM, you wrote:
N> Brian; N> Since you have JUST 10 feet head, what is the water volume you have ?. I do not have a site survey yet - I can only estimate visually at this point. River is about 20' wide and my wife is up to her eyeballs in the center of the flow. She's 5'2" so figure 4 1/2' deep. The hole appears pretty wide so I'd give it an average depth across of 2'. That's 40 square feet. There's white water around the rocks so I'd say there's at least 60 feet per minute velocity. 40 square feet times 60 feet per minute yields 2400 cubic feet per minute. Multiply by 7 gallons per cubic foot and that yields 96,000 gallons per minute. I'd wager I could be off by 50% so lets say I have something on the order of 40,000 GPM to work with. I don't know microhydro too well (that's why I am here) but it seems that's plenty of volume - head is going to be the issue. N> If you have a quality Sextant then with geometry you can measure the length N> of the pipe, you already know the HEAD. I am guessing at the head. It could be less - and when you are talking about that sort of head even a few feet makes a huge difference in available power (or so I understand it). N> There are laser equipment for that purpose that are accurate to a fraction N> of a centimeter in hundreds of meters, though you pay for those. Yes. Pricey stuff. I'm hunting around to see if I might know someone who might let me borrow one they own. Not likely, I'm afraid. I'll be there this coming september so I'll have better detail then. Thanks - Brian ------------------------ Yahoo! Groups Sponsor --------------------~--> Make a clean sweep of pop-up ads. Yahoo! Companion Toolbar. Now with Pop-Up Blocker. Get it for free! http://us.click.yahoo.com/L5YrjA/eSIIAA/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/
