. The street railway review . ir during the first18 hours of the day, or when the lighting load is small. Thus extramen and additional Ixiilers arc not required. The economy of thewhole plant, in pounds of coal per unit output, was increased 8per cent by the addition of the pumping load. The water horsepower of work by the pumps is reduced to kilowatt hours. At 14011). pumping pressure, 1,000,000 gallons pumped per day arc exactlyi(|uivalent to kw. h. output. The efliciency of the pumpingengines on steady load is approximately equal to that of the railwayand lighting service. Auxiliaries
. The street railway review . ir during the first18 hours of the day, or when the lighting load is small. Thus extramen and additional Ixiilers arc not required. The economy of thewhole plant, in pounds of coal per unit output, was increased 8per cent by the addition of the pumping load. The water horsepower of work by the pumps is reduced to kilowatt hours. At 14011). pumping pressure, 1,000,000 gallons pumped per day arc exactlyi(|uivalent to kw. h. output. The efliciency of the pumpingengines on steady load is approximately equal to that of the railwayand lighting service. Auxiliaries. In importance, there is first a 20-ton Whiting traveling crane toreduce the labor item and to decrease the time required for inspec-tion and repairs. There arc several small motor driven accessoriesfor the economizer, ash conveyor, etc., a Holly gravity return systemof drainage to save all condensation, a Sweet receiver, Finn traps,an automatic oiling system, etc. The steam auxiliaries were recently tested by R. P. Stevens,. EXTERIOR OF IOWER IIOISE. EVERETT RAII-WAY & ELEC-TRIC CO. superintendent, and D. f?. Young, engineer. The steam was weighed,using a small special temporary condenser. It was found that theauxiliaries require the following pounds of steam per 24 hours:Holly system 2,300; boiler feed pump 2,360; stoker engine 975; dryvacuum or air pump 6,250; induced draft fan engine ; toUil, lb. or from 6 to 7 per cent of the steam usc<l by the heat units in the exhaust steam are entirely used to heat thefeed water as stated. May 20, 190,?.] STREET RAILWAY REVIEW. 271 men work on eight hour shifts. Two men operate the planton each shift, one in the engine room, one in the boiler room. Thereis one chief engineer over these six operators. The design of ilieplant permits a minimum of labor. water evaporated by the boilers is metered by cold watermeters before it goes to the heater. Coal is weighed in cars only,except during t
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
