[EMAIL PROTECTED] wrote: > > Thanks, Nando, for your reply, and for yours as well, Dane and Max. ... ... > > > Is there a chart or formula anywhere which shows potential harnessable > energy based on volume and velocity? Or perhaps a coefficient of all 3- > volume, velocity, and head? Please pardon any glaring mistakes I may be > making, as I am a neophyte.
Yes, this information is available. I will break it into two parts; the first belongs to basic hydraulics, the second relates specifically to the Aquair turbine. 1. When water flows under pressure through an orifice due to an imposed head (h), the velocity (V) in m/sec is given by: V = C x sqrt(2 x g x h) where g is the gravitational constant = 9.8m/sec^2; h is the head in metres and C is a constant called the coefficient of discharge. The value of C will depend on the specifics of the site, but is likely to have a value of 0.6 to 0.65. For example at a head of 1 metre the velocity will be about 3.7 m/sec. The discharge rate, (which is usually designated by Q and expressed in m^3/sec) = V x A where A is the area of the orifice in m^2. Multiply Q by 1000 to obtain a discharge rate in litres/sec. 2. For detailed performance specs on the Aquair go to www.ampair.com, click on the 'Hydro power' thumbnail and then click on the AQUAIR UW tab. This page includes a graph that shows output (in amps @ 12V) versus velocity. For example at 3.7 m/sec the output is 8A, which equates to 96W. Regards, Max Enfield Planetary Power ------------------------ Yahoo! Groups Sponsor --------------------~--> In low income neighborhoods, 84% do not own computers. At Network for Good, help bridge the Digital Divide! http://us.click.yahoo.com/EA3HyD/3MnJAA/79vVAA/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/
