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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />Manufacturers of turbines and pumps-as-a-turbine were con- <br />tacted to determine if they had units in the 100kW-lSOkW range. <br />For small units the use of a pump-as-a-turbine is advantageous <br />because of cost and availability. A pump-as-a-turbine is simply a <br />pump reversed so that water moves the impeller which turns a <br />generator to produce power. <br /> <br />An exhaustive search for manufacturers was not made, but <br /> <br />nearly all of the known potential suppliers in the area were <br /> <br /> <br />contacted. The manufacturers with small units were: Allis- <br /> <br /> <br />Chalmers, pump-as-a-turbine; Byron Jackson, turbine; Byron <br /> <br /> <br />Jackson, pump-as-a-turbine; Oriental Engineering and Supply, <br /> <br />turbine; and Worthington Pump Co., pump-as-a-turbine. <br /> <br />The only unit which met all four criteria was the Worthington <br />pump-as-a-turbine but the pump will have to be dismantled to fit <br />into the elevator. The Byron Jackson turbine and the pump met all <br />of the other criteria except they were too large to be moved to <br />the gate chamber; both are vertical units and the barrels are <br />larger than the elevator. The other two suppliers could not meet <br />two of the criteria. Given the constraints of the site, it was <br />fortunate that one manufacturer had a unit that could operate at <br />the site. <br /> <br />The Byron Jackson turbine had adjustable wicket gates which <br />made it the most efficient turbine available. However, comparison <br />of the kWh output of the Byron Jackson turbine and the Worthington <br />pump-as-a-turbine showed that the pump produced within 10% of what <br />the turbine produced and the pump was about one-third the cost of <br />the turbine. The pump would have probably been selected over the <br />turbine based on cost and output if both had worked at the site. <br />The Byron Jackson pump-as-a-turbine produced a little less than <br />the Worthington pump but would have been a viable unit had it fit <br />in the elevator. <br /> <br />7.0-10 <br />