. The railroad and engineering journal . f the tubeshad suffered no perceptible diminution. The Author thengave the results of some recent trials made by ProfessorAlexander Kennedy—whose report was appended to thepaper—both with natural draft and with different amountsof forced draft, and a full description was given of themethod of conducting them. At the most economical rateof working, the evaporation, reduced to standard, amountedto lbs. of water per pound of fuel, and the followingheat-balance showed the way in which the heat of thecombustion was utilized by the boiler : Per cent. Hea
. The railroad and engineering journal . f the tubeshad suffered no perceptible diminution. The Author thengave the results of some recent trials made by ProfessorAlexander Kennedy—whose report was appended to thepaper—both with natural draft and with different amountsof forced draft, and a full description was given of themethod of conducting them. At the most economical rateof working, the evaporation, reduced to standard, amountedto lbs. of water per pound of fuel, and the followingheat-balance showed the way in which the heat of thecombustion was utilized by the boiler : Per cent. Heat expended in heating and evaporating feed-water Heat expended in raising temperature of furnace gases lo 8 Heat lost through formation of carbonic oxide Heat lost by radiation and otherwise unaccounted for 100,0 The very high percentage of evaporation——repre-sented the efficiency of the boiler, and was simply equal tothe ratio between the actual evaporation and that theoretU 64 THE RAILROAD AND [February, F^4
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectrailroa, bookyear1887
