Hi there,
It is possible to extract energy from the flowing water. The potential energy will depend on the speed of the water current, normally given in meter per second. Just like in wind power, higher the speed higher the power output form the turbine. The turbine that you are looking for is commonly knows as water current turbines, and many are still in prototype stages. See this website: http://www.althydrosolutions.com/ Ghanashyam -----Original Message----- From: Mohammad Jahangir Khan [mailto:[EMAIL PROTECTED] Sent: Thursday, November 04, 2004 10:23 AM To: [EMAIL PROTECTED] Subject: [microhydro] Re: Newbie question: energy estimation from flow rat e Hi Martin Thans for your reply and sorry for my late response. In fact I am looking into 'Kinetic energy conversion' and not 'Potential/head energy conversion'. I know that's a bit unconventional, but do you think that is totally impossible/impractical to do ? Thanks Jahangir. --- In [EMAIL PROTECTED], "Martin.Leahy" <[EMAIL PROTECTED]> wrote: > > Most waterpower systems require that you concentrate most of the practical > head (fall) between the entry (high) point and the exit back to the stream > (low point). i.e. one is attempting to harness the potential energy of the > water falling from high point to low point. [Harnessing the kinetic (speed) > energy is a different and less used approach] > > Power available is then: > > Power (kW) = flow (m3/s) x head (m) x g (m/s^2) x overall efficiency > > where g is the acceleration due to gravity. > > or say power (kW) = flow (m3/s) x head (m) x 7 > > The units one buys and sells electricity are kWh (i.e. the number of kW > times the hours of operation at that power level). Cost effective systems > will usually have a 30-40% capacity factor (i.e. the power output in an > average year would be nameplate power x hours in the year x 0.4). > > You need to measure the head, and the more (financial/time) risk you take > the more confident you need to be about the accuracy of the head and flow > you measure! > > Regards, > > Martin > > -----Original Message----- > From: Mohammad Jahangir Khan [mailto:[EMAIL PROTECTED] > Sent: 01 November 2004 14:08 > To: [EMAIL PROTECTED] > Subject: [microhydro] Newbie question: energy estimation from flow rate > > > > > > Hi > > Is it possible to measure the energy/power available from a free- > flowing water stream ? The flow-rate is given in m3/s. > > Thanks. > J. Khan > > > > > > > > > > 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 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 ------------------------ 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/
