Re.: Pennstock size. If you have access to Machinery's Handbook (try your local Library or a machine shop), there are tables for flow and power for different sizes of pipe & Head. These tables are located near the back on the book.
Example: Theoretical Velocity of water due to head in Feet: 6' head = 19.66 feet/ second = 1077'/minute 7' head =21.23 feet/second = 1274'/minute. 1274 - 1077 = 197feet/minute difference. 197'/min * .6667= 131.34'/min + 1077'/min =1208'/min. Velocity '/min times Area in Square feet = Volume in Cubic feet /minute. (this is the usual unit used by engineers) 1 Cubic foot = 7.48 Gallons The area of a10 inch pipe(in square feet is)0.545 square feet. 1208'/min * 0.545 square feet = 658.36 cubic feet/min. 658.36 cubic feet * 7.48 gallons =4924.5328 gallons. There are also formulas to compensate for bends & length of pipe. Another good book is: Marks' Mechanical Engineers Handbook. It has a whole section on Water Power. However both books are very expensive. See also: Small Hydropower Handbook 33 pages. www.smallhydropower.com/manual3.htm This is an excellent Manual and it is FREE. Arthur [EMAIL PROTECTED] ------------------------ 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/
