. Official proceedings . ^5)_; 2C 30 40 50 60 70 frO 90 100 110 120 130 140P0UNC8 DSy COAL Fl«£0 PEFl SQUARE FOOT OF GRATE PER MOLW Fig. 5 101. 20 40 60 80 100 120 140 160 POUNDS DRY OOAL riREO PER SQUARE TOOT OF GRATE PER HOUR ,FIG. 6EQUIVALENT EVAPORATION PER HOUR FROM (1) ENTIRE BOILER (2) TUBE HEATING SURFACE(J) FIREBOX HEATING SURFACE test data. The curve of firebox evaporation was calculated fromthe curve in Figure 3, using the firebox temperatures shown inFigure 5. The curve showing tube evaporation was obtained bysubtracting the firebox evaporation from the total. At the lowest rate of
. Official proceedings . ^5)_; 2C 30 40 50 60 70 frO 90 100 110 120 130 140P0UNC8 DSy COAL Fl«£0 PEFl SQUARE FOOT OF GRATE PER MOLW Fig. 5 101. 20 40 60 80 100 120 140 160 POUNDS DRY OOAL riREO PER SQUARE TOOT OF GRATE PER HOUR ,FIG. 6EQUIVALENT EVAPORATION PER HOUR FROM (1) ENTIRE BOILER (2) TUBE HEATING SURFACE(J) FIREBOX HEATING SURFACE test data. The curve of firebox evaporation was calculated fromthe curve in Figure 3, using the firebox temperatures shown inFigure 5. The curve showing tube evaporation was obtained bysubtracting the firebox evaporation from the total. At the lowest rate of evaporation, the curve indicates thatthe firebox evaporated 40 per cent, of the total, and at the highestlate, 37 per cent. An equivalent evaporation of pounds-per hour from 232 square feet of heating surface means an evap-oration of poimds per hour per square foot of heating sur-face ; and the temperature on the fire side of the sheet would beabout 536 degrees, if the sheets were clean. These figures show 102 what can be expected when high firebox temperatures and largeradiating surfaces are to be had; for firebox evaporat
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Keywords: ., bookauthorrailwayc, bookcentury1900, bookdecade1900, bookyear1901
