[EMAIL PROTECTED] wrote: > > While trying to track down information on Pump As Turbine (PAT) I ran across > "High Specific Speed Impulse Turbines." > > NOTE: I'm just a novice with all this stuff, but isn't the issue that these > folks are looking to overcome addressed for PAT by using electronic load > controllers? > > BTW - PAT looks really great for small installations (and for long-term > viability [pumps being ubiquitous]). > > -Mark Nagel > Everett, WA
A detailed discussion of "specific speed" can be found in any textbook on hydro-power. Briefly, it is a number dependent on the geometry of a turbine. If head, rpm and output efficiency are held constant, then the higher the flow rate a turbine can handle, the higher will be its specific speed. So, for example adding more jets to a Pelton wheel will increase its specific speed. It has nothing to do with electronic load governors. 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/
