. American stationary engineering; a practical work which begins at the boiler room and takes in the whole power plant. Fig. 29. The letters in this figure refer to the same parts of the boileras do those in fig. 27, i. e., F B to the fire-box, etc., etc. It was formerly the custom to make the tubes much longerthan shown in the fig., with the object of gaining heatingsurface ; but modern experience has shown that the last threeor four feet next the smoke box were of little or no use, because,by the time the products of combustion reached this part of theheating surface, their temperature was s
. American stationary engineering; a practical work which begins at the boiler room and takes in the whole power plant. Fig. 29. The letters in this figure refer to the same parts of the boileras do those in fig. 27, i. e., F B to the fire-box, etc., etc. It was formerly the custom to make the tubes much longerthan shown in the fig., with the object of gaining heatingsurface ; but modern experience has shown that the last threeor four feet next the smoke box were of little or no use, because,by the time the products of combustion reached this part of theheating surface, their temperature was so reduced that butlittle additional heat could be abstracted from them, Thetubes, in addition to acting as flues and heating surface, fulfilalso the function of stays to the flat end of the barrel of theboiler, and the portion of the fire box opposite to it. In addition to the staying power derived from the tubes, thesmoke box, tube plate and the front shell plate are stayedtogether by several long rod«» 76 Maxims and HIO -<! mH O w Maxims and Instructions. 77 STANDARD HORIZONTAL TUBULAR STEAM BOILER. XABLE OF SIZES, PROPOKTIONS, ETC Diameter of LengthSheU. 0 OQ Gauge ofHeads. Number ofTubes. LengthTubes. Square. feet ofHeatingSurface. 3 . Sol 72 in. 19 ft. 4 in. 3-8 in. 1-2 in. 80 4 in. 18 ft. Gin. 1,500 100 73 18 4 3-8 1-2 86 ^ «» 17 0 1,500 100 73 • 17 4 3-8 •• 1-3 108 3 16 0 1,500 100 66 18 4 3-8 1-3 74 3^ « 17 0 1,350 90 66 17 4 3-8 1-3 93 3 « 16 •• 0 * 1,8&0 90 60 18 3 3-8 1-2 78 3 « 17 0 1,200 80 60 17 3 3-8 1-3 76 3 11 16 0 1,125 75 60 16 3 3-8 1-3 •• 77 3 <4 15 0 1,050 70 60 16 « 3 «• 3-8 1-3 70 3 << 15 0 975 65 60 16 3 3-8 1-3 64 3 tc 15 0 900 60 54 •• 17 3 5-16 7-16 60 3 <( 16 0 900 50 54 17 3 5-16 7-16 66 3 « 16 0 825 55 54 16 3 5-16 7-16 52 3 << 15 0 750 50 54 16 3 5-16 7-16 46 3 • < 15 0 675 45 54 16 3 5-16 7-16 40 3 « 15 0 600 40 48 ? W 2 5-16 7-16 50 3 4t 16 0 750 60 48 16 2 5-16 7-16 ••
Size: 1082px × 2309px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectsteamen, bookyear1917
