Things of the microhydro, David.
Here is another history case: Some years ago a turbine was suddenly stopped. After opening it, we found a mouse in the nozzle of the cross flow 5 kWe turbine set, located between nozzle top and flow regulator valve. The nozzle is only 50 mm width, as gross head is 63 m. The mouse comes inside 6" dia. PVC penstock with his head pointing down and became "wedge formed" (as in Tom & Jerry films); was very funny (for us not for the mouse, indeed). Preventing future problems we had taked out the flow regulator valve and turbine runs very well without it, fixing the flow by means of the butterfly valve installed in the pipe about 2 m up flow from the turbine entrance. Carlos -------------------------------------------------- ----- Original Message ----- From: "allenderd" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Friday, February 04, 2005 9:46 AM Subject: [microhydro] Proof of global warming - frogs block turbine nozzles > > > > My micro-hydro has worked fine for several years with minimal > trash screening. Recently, I have had the turbine nozzles blocked > with dead frogs. Now I know that Egypt was plagued with them when > Moses was around but they have suddenly appeared in the stream that > provides the water for the turbine. They have never been present > before. So, this hill stream and its surrounding area seems to have > warmed up significantly enough to make the habitat suitable for > frogs. Proof of global warming ? The trash screen has had to be > extended over the top of the forebay to stop the blighters jumping in > and commiting suicide > David > www.OffTheGrid.co.uk > > > > > > > > > > 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 --------------------~--> What would our lives be like without music, dance, and theater? Donate or volunteer in the arts today at Network for Good! http://us.click.yahoo.com/TzSHvD/SOnJAA/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/
