Thanks for the clarification. This is more closely what I was thinking that the information that I had read implied. As stated, I'm not very polished at all this stuff, just learning it (no practical experience, nor no real background in electrical systems/theory).
So I guess why question (for subsequent clarification) would be: Can speed governors help rectify/level out the sensitivity problems with these high specific speed impulse turbines? Or does/would the addition of this extra component negate the cost savings of this PAT(?) Ugh, I feel that I've gotten in way over my head. I appreciate people's patience in helping educate me on this stuff. -Mark Nagel Everett, WA -----Original Message----- From: H2MJD [mailto:[EMAIL PROTECTED] Sent: Friday, January 21, 2005 8:31 AM To: [email protected] Subject: Re: [microhydro] High Specific Speed Impulse Turbines? Perhaps Mr. Nagel meant Electronic SPEED governor.....I've always wondered if speed controllers could be used as power point trackers when doing a utility interfaced system. My understanding is that some speed controllers allow for backfeeding the grid......am i wrong? ----- Original Message ----- From: Max Enfield To: [email protected] Sent: Friday, January 21, 2005 2:07 AM Subject: Re: [microhydro] High Specific Speed Impulse Turbines? [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 [Non-text portions of this message have been removed] ------------------------ Yahoo! Groups Sponsor --------------------~--> Has someone you know been affected by illness or disease? Network for Good is THE place to support health awareness efforts! http://us.click.yahoo.com/RzSHvD/UOnJAA/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/
