. Electric railway journal . st gases from four more boilerswhen installed. The new stack was built of common hard-burned brick, exactly duplicating in design the originalstack, and was made by the Heine Chimney Company. Ithas a height of 225 ft. above the boiler-room floor and itsflue has a diameter of 11 ft. at the top. The power-plantequipment includes a Schaeffer & Budenberg stack-draflrecording gage installed in the chief engineers office. HOILER PLANT CHANGES fn order to obtain the highest possible capacity fromthe older boiler plant several successful changes have beenmade in the instal
. Electric railway journal . st gases from four more boilerswhen installed. The new stack was built of common hard-burned brick, exactly duplicating in design the originalstack, and was made by the Heine Chimney Company. Ithas a height of 225 ft. above the boiler-room floor and itsflue has a diameter of 11 ft. at the top. The power-plantequipment includes a Schaeffer & Budenberg stack-draflrecording gage installed in the chief engineers office. HOILER PLANT CHANGES fn order to obtain the highest possible capacity fromthe older boiler plant several successful changes have beenmade in the installation. The stokers on the first eightboilers are being replaced by others of the chain-gratetvpe, but having a larger grate area and being standardwith those earlier mentioned for the new boilers. Sus-pended igniting arches 6 ft. long have also been change which brought about improved combustionconditions was the lowering of the grates about 18 in. toincrease the height between the grates and the lower. Aurora, Elgin & Chicago—Main Generating Station, Showing Low-Pressure Turbine in the Foreground spondingly improved. This seems to be due to the factthat the turbine absorbs most of the load fluctuations andthus allows the engines to run at approximately uniformloading. BOILER PLANT IMPROVEMENTS At the time the low-pressure turbine was installed theboiler house of the plant was extended to permit the in-stallation of an additional equipment of four 500-hp boil-ers of the same manufacture as the original boilers. Thenew boilers were all equipped with Green chain-gratestokers, each having a 6-ft. flat arch and a grate area of106 ft. This is an increase in grate area of per cent over that of the earlier installation of boil-ers of the same horse-power rating. The new boilers arefifteen tubes high instead of twelve, and are installed with-out economizer equipment. Instead a Hoppes open feed-water heater was installed to utilize the exhaust stea
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