. Electrical world. ected between itand the condenser. For handling the condensing water the cen-trifugal pump at each turbine is of the Worthington volute type,24-in. size, and is driven by a direct-connected Fleming Harrisburgside crank engine with 15 by is-in. cylinder, at 200 Thisengine has a throttling governor. The circuit of the condensing water through its pump and thecondenser forms a syphon, so that the pump is only obliged to givethe water a velocity head and to overcome the friction. Though thefloor of the turbine room is 16 ft. above mean low tide water, it isestimated that
. Electrical world. ected between itand the condenser. For handling the condensing water the cen-trifugal pump at each turbine is of the Worthington volute type,24-in. size, and is driven by a direct-connected Fleming Harrisburgside crank engine with 15 by is-in. cylinder, at 200 Thisengine has a throttling governor. The circuit of the condensing water through its pump and thecondenser forms a syphon, so that the pump is only obliged to givethe water a velocity head and to overcome the friction. Though thefloor of the turbine room is 16 ft. above mean low tide water, it isestimated that the maximum lift of the pump that handles the con-densing water will be less than 10 ft. Each turbine may draw itscondensing water from either of the two suction sluices above con-sidered, and this makes it possible to discontinue the use of eitherof these sluices for the purpose of cleaning or any other Worthington volute wet vacuum pump is driven by a direct-connected lo-hp motor of the induction Fig. 6.—Pl- of Fourth Station Property Showing 1903-4 and Proposed Future Installations. and steam instead of electric drive is used for these pumps becausethere is not as much exhaust steam available as could be used inthe feed water heaters. No economizers are to be used in this plant, but the gases of com-bustion from each end group of eight boilers go directly to theirchimney through a short iron flue of 8 by 20 ft. cross-section. Eachchimney thus receives the gases from 16 boilers through two fluesof this size on opposite sides. The number of chimneys for thecompleted station is thus six, there being one chimney for every twoturbine units. Gases from boilers of 8,000 hp nominal rating thuspass to each chimney, which is round in plan with a height of 250 the foundation, and interior diameters of 18 ft. at the bottomand 16 ft. at the top. These chimneys are constructed by theAlphons Custodis Chimney Construction Company. The eight boilers that supply
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
