. Electric railway journal . eceive water from a gravity tunnel, which extendsunder the entire length of the turbine room. The waterfrom the condenser discharges into another gravity tun-nel, which also extends under the turbine room andcarries the water out into the river at a point about160 ft. below the intake. Each condenser is providedwith duplicate motor-driven single-stage centrifugalcondensate pumps. The concrete tunnels under the tur-bine room eliminate the usual large amount of pipingrequired for circulating water and also convenientlysupply the water with a minimum waste of power. T
. Electric railway journal . eceive water from a gravity tunnel, which extendsunder the entire length of the turbine room. The waterfrom the condenser discharges into another gravity tun-nel, which also extends under the turbine room andcarries the water out into the river at a point about160 ft. below the intake. Each condenser is providedwith duplicate motor-driven single-stage centrifugalcondensate pumps. The concrete tunnels under the tur-bine room eliminate the usual large amount of pipingrequired for circulating water and also convenientlysupply the water with a minimum waste of power. Thewater in the tunnel will have a velocity of 2 ft. persecond with the two turbines carrying full load andabout ft. per second with 40,000 kw. of turbine ca-pacity in operation. The discharge water lines fromthe condensers are sealed in the discharge tunnel so thatadvantage is taken of the syphon action obtained. The intake end of the tunnel is enlarged and providedwith a large area of racks for the water to flow through. FIG. 8—C ROSS- SECTION OFTURBINE ROOM SHOWINGARRANGEMENT OF VERTICALMOTOR-DRIVEN CIRCULATINGWATER AND CONDENSATEPUMPS
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