. The Street railway journal . gals, per minute. For this air lift a Norwalk and aLaidlaw-Dunn-Gordon compressor are installed, with respec-tive capacities of 254 cu. ft. and 127 cu. ft. a minute. The exhaust from the auxiliaries after passing through theheater reaches these tanks at no degs., and heats the water toabout 80 degs., at which temperature the water is forced bythe pumps through the water side of the heater to theeconomizers. The water enters the economizers at about 150degs., and goes to the boilers at from 275 degs. to 280 tanks feed to the pumps by gravity. By this meth
. The Street railway journal . gals, per minute. For this air lift a Norwalk and aLaidlaw-Dunn-Gordon compressor are installed, with respec-tive capacities of 254 cu. ft. and 127 cu. ft. a minute. The exhaust from the auxiliaries after passing through theheater reaches these tanks at no degs., and heats the water toabout 80 degs., at which temperature the water is forced bythe pumps through the water side of the heater to theeconomizers. The water enters the economizers at about 150degs., and goes to the boilers at from 275 degs. to 280 tanks feed to the pumps by gravity. By this method thehighest efficiency is obtained from the heat of the auxiliaryexhaust and of the escaping flue gases. None of the engineexhaust is used in this connection, as jet condensers are em-ployed. The use of artesian water for the boilers is necessaryas the river water is not at all suitable and the city water isexpensive and also unfit. An excellent grade of water is ob-tained from the wells, there being a very small quantity of. ders 32 ins. and 68 ins. in diameter and a 60-in. stroke. Thisengine has a speed of 75 r. p. m., and is rated normally at 2700hp, with a guarantee for carrying a 50 per cent overload con-tinuously. It is directly conected to a 1600-kw, 575-volt Gen-eral Electric direct-current railway generator. The fifth engine, Fig. 11, which is now being installed, is ofthe Allis-Corliss type, and is similar to No. 4, except that itsnormal rating is 2400 hp and its cylinder dimensions 30 ins. and60 ins. x 48 ins., with a speed of 94 r. p. m. This engine willdrive a 1500-kw, thirty-two-pole, revolving field General Elec-tric alternator, that will generate a 2300-volt, 25-cycle, three-phase current for use in transmitting power to sub-stations. All the engines rest on solid concrete foundations, made ofthe best Dyckerhoff-Hemmoor cement. In forming the founda-tion for the 1600-kw direct-current unit 800 barrels of cementwere used. Bundy oil separators are used on all th
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
