. Railway mechanical engineer . EXAMPLETons Per Day = ZOODollars PerTon » Per Lb. = Average = 8%FlueTempera-kire,fc00oFLoss Per Day =*33E _l L_L I c|2 \CL. A. sJ4 Z& v ^ ,5- V , < a. w o° f s^ r / <f / / / / /. 7 6 5 4 3 Z I 0Hundred Dollars Per Day Loss. Fig. 2—Fuel Losses Measured by C02 and Flue Temperatures can be made, the higher will be the efficiency of the boiler;this is no doubt generally conceded to be a fact by all powerplant men. Every substance expands and contracts under temperaturechanges. In each 180 deg. iron changes one part in 800approximately, whil
. Railway mechanical engineer . EXAMPLETons Per Day = ZOODollars PerTon » Per Lb. = Average = 8%FlueTempera-kire,fc00oFLoss Per Day =*33E _l L_L I c|2 \CL. A. sJ4 Z& v ^ ,5- V , < a. w o° f s^ r / <f / / / / /. 7 6 5 4 3 Z I 0Hundred Dollars Per Day Loss. Fig. 2—Fuel Losses Measured by C02 and Flue Temperatures can be made, the higher will be the efficiency of the boiler;this is no doubt generally conceded to be a fact by all powerplant men. Every substance expands and contracts under temperaturechanges. In each 180 deg. iron changes one part in 800approximately, while firebrick changes one part in 2,000,which of course is a great variation. The result is that theiron-work expands more than the brickwork, and there isnecessarily a slight relative movement between them as theexpansion takes place. As the boiler cools the reverse con-dition occurs and this contraction and expansion soon de-velops cracks and openings so that the settings require closeattention at all times. These leaks can be located by themethod referred to heretofore or by throwing a scoop or two-of green coal on the fire and closing the damper tightly. Im February, 1921 RAILWAY MECHANICAL ENGINEER 91 this case the result i
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
