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SECTION 6: POTENTIAL FOR HEAD RECOVERY AT MWD CONNECTIONS 1s MWD Figure 2 SA -1 Proposed Configuration Ball Valve New Generator with Motorized Flow Controller Normally Normally open Open New Turbine PRV Pump Room Motorized To Santa Ana Distribution ............. New Construction The original pressure drop was designed for 200 feet, or 87 psi. The actual pressure drop appears to range from 217 to 275 feet, or 94 to 119 psi. A turbine should be selected that operates well over this pressure range. For the purposes of this analysis, a single operating pressure differential will be used. The midpoint of the observed pressure ranges is 245 feet, or 106 psi. One potential turbine that could be used in place of the Byron Jackson turbine is a Canyon Hydro In -Line Turbine ILT12-33-9.0. This turbine has a 12 -inch supply and discharge pipes in the same configuration as the current turbine, with a vertical axis and the generator mounted above the turbine. A proposal for this turbine generator package is contained in the Appendix. Another proposal is presented for a turbine with a horizontal axis manufactured by Gilkes. In this case the Canyon turbine is less expensive and matches the geometry of the existing installation. The Canyon Hydro turbine curve indicates a mechanical efficiency of 83.5% at the design point of 8 CFS and 245 feet. This implies an electrical output calculated as follows: 8.0 ft3hp sec 62.4 lbs 0.746 kW sec x 245 ft x 550 ft ibs x ft3 x 83.5%meth of f.x 95%elect. of f x hp =132 kW Through the installation of a new hydro -turbine and generator at SA -1, the output of the generator will increase from 68 kW to 132 kW. This will happen for the 6,645 hours per year that this connection is in use, for an electrical savings of 425,280 kWh per year. Note, the existing turbine is calculated to generate 68 kW x 6,645 hours per year, or 425,299 kWh per year of renewable electricity. Newcomb I Anderson I McCormick 19H-23 CITY OF SANTA ANA