I would think any attempt to extract energy from the outlet would change the system flow and consume more energy back at the driver.
Consider this thought experiment: Hook a hose into the discharge. Now take the other end and elevate it to some height and let the resultant flow fall onto a water wheel. You will capture energy but the pump now has to pump the flow up more head and consumes more energy to do so. It will also pump less water because you are working against more head and changing your location on the pump characteristic curve. With extra friction losses and mechanical inefficiencies, you consume more energy than you create. A reaction turbine would also have the same effect as it would raise the pressure the pump works against. Martin --- In [email protected], "EDDY CASARES" <[EMAIL PROTECTED]> wrote: > I have approached this idea of using the excess return pressure from the > pump of my swimming pool in the following manner: > > Any one can verify that once you overcome the friction loss in your filter > and in the return pipe system, you still have quite a bit of a pressure at > the discharge of each return at the pool. > > Well, anyone could use a portion of that pressure at the returns to run a > picoturbine and perfectly generate about 200 Watts or more for 8 hours > (Recommended for proper maintenance) which would be enough to help charge > your battery at night as a backup to a 200 Watt Photovoltaic System for > instance. > > This method is used in industry as an energy recovery in Reverse Osmosis > where high pressure of the reject flow is conveyed to a Pelton Turbine. > > Eddy > > > > ----- Original Message ----- > From: <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Friday, September 16, 2005 6:40 AM > Subject: Re: [microhydro] Reaction Turbine System for Home > > > > Thanks for responding Michael! I have a 30,000 gallon pool and, according > to > > the manufacturer, the water should be circulated 6-8 times a day through > the > > filter (minimum of 8 hours). I really don't know how much power that could > > generate. As it is now, the electric pump only circulates the water. Thank > you. > > > > Steve > > > > > > [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! Groups Links > > > > > > > > > > > > ------------------------ Yahoo! Groups Sponsor --------------------~--> Get fast access to your favorite Yahoo! Groups. Make Yahoo! your home page http://us.click.yahoo.com/dpRU5A/wUILAA/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/
