. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . If we assume that the averagetemperature of the water in the tender tank, summer andwinter, will be 55°, it is found on consulting tables of theproperties of steam that 1,311 must be supplied toeach pound of water at 55° in order to convert it intosteam of 200 pounds boiler pressure with 250 of initialsuperheat, the conditions which will be assumed as anexample. Further, it will be assumed that, consideringthe service in which the locomotive is to be operated andthe draught requirement
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . If we assume that the averagetemperature of the water in the tender tank, summer andwinter, will be 55°, it is found on consulting tables of theproperties of steam that 1,311 must be supplied toeach pound of water at 55° in order to convert it intosteam of 200 pounds boiler pressure with 250 of initialsuperheat, the conditions which will be assumed as anexample. Further, it will be assumed that, consideringthe service in which the locomotive is to be operated andthe draught requirements, the average running back pres- August, 1927 RAILWAY AND LOCOMOTIVE ENGINEERING 227 sure will be 5 pounds, and steam tables show that the tem-perature of exhaust steam at this pressure will be 225° is now possible to estimate the saving from the op-eration of a feed water heater under these conditions, andit will be assumed that the locomotive requires .38,000pounds of steam per hour to develop its maximum power Average- Pounds of Coal per Passenger Train Car Mile «» , , W4 IB25 1928. Aver ».« Pounds of 1023 30AL PER 101924 oc s w ss Ton Milee102a N Fre 1GHT192a 5ERVK :b f*o- 3 ..., b 1. „.— H. _J Fig. ocomotive Fuel ConsumptionFreight Train Service Passenger and in the cylinders and that five per cent of its boiler capacityis required to cover radiation losses, requirements fortrain heating, etc. A total boiler capacity of 40,000pounds of steam per hour is therefore assumed, whichalso means that 40,000 pounds of feed water per hour willhave to be heated through 160°. The heat required perhour to heat the feed water is therefore: 6,400,000 (1)From the steam tables it is found that each pound ofexhaust steam in being condensed from steam at 225° towater at the same temperature supplies 962 to the
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
