. Fuel economy and CO recorders, engineers' study course from Power. A practical manual dealing chiefly with the heat losses in boilers and the principle, operation and care of CO recorders. An understandable treatment of combustion, coal analysis, flue gas analysis, heat losses in flue gases, draft, chimney design, evaporation, boiler efficiency, heat balance, feedwater treatment and CO recorders and their troubles. e to the slight additional friction of the requiredadditional length of vertical pipe. The principles of boiler-furnace draft, produced by a chimney,are very similar to those invo
. Fuel economy and CO recorders, engineers' study course from Power. A practical manual dealing chiefly with the heat losses in boilers and the principle, operation and care of CO recorders. An understandable treatment of combustion, coal analysis, flue gas analysis, heat losses in flue gases, draft, chimney design, evaporation, boiler efficiency, heat balance, feedwater treatment and CO recorders and their troubles. e to the slight additional friction of the requiredadditional length of vertical pipe. The principles of boiler-furnace draft, produced by a chimney,are very similar to those involved in the foregoing diflerence in actual application is that the chimney system 94 CHIMNEY DESIGN 95 seemingly works upside down. The boiler room itself correspondsto the overhead tank in Fig. 23; the furnace, gas passages of theboiler, breeching and chimney are the piping system. But,instead of the flow being downward, as in the case of the watersystem, it is upward. Nevertheless,gravity is the actuating force in bothcases. The heavy cool air outsidethe chimney containing the light, hotgases has, due to the force of gravity,a continual tendency to seek its ownlevels in the chimney and force up thelight gases. It never succeeds, how-ever, for as long as the fire is main-tained the heavy cool air is convertedinto light hot gas in passing throughthe fuel bed. The important point of comparison. 300-? ^Zfank Fig. 23.—Illustration to show principal of chimney draft. b e tw ee nthe watersystem hereillustra tedand a nat-ural-draft system is that similar changes in dimensions or design producesimilar results. If it is desired to increase the head (or draft)so that a certain rate of flow may be maintained against a givenresistance, logically, the height of the water pipe or chimney, asthe case may be, must be increased. While increasing the areaof the piping or the gas passages helps to a slight extent, themain resistance (at E, Fig. 23, or at the fuel bed in the ca
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectsteamboilers, bookyea
