. American stationary engineering; a practical work which begins at the boiler room and takes in the whole power plant. t power ofchimneys is proportional to the square root of the height, so wemay reduce its area below the collective area of the boiler tubesin the same proportion that the square root of its height exceedsthe square root of 81. For example, suppose we have to design a chimney for tenboilers, 6Q in. in diameter, each having 72 tubes, 3^ in. indiameter, what would be its proportion ? The collective area of the 720 3^-in. tubes would be 6,017square inches, and if the chimney is t
. American stationary engineering; a practical work which begins at the boiler room and takes in the whole power plant. t power ofchimneys is proportional to the square root of the height, so wemay reduce its area below the collective area of the boiler tubesin the same proportion that the square root of its height exceedsthe square root of 81. For example, suppose we have to design a chimney for tenboilers, 6Q in. in diameter, each having 72 tubes, 3^ in. indiameter, what would be its proportion ? The collective area of the 720 3^-in. tubes would be 6,017square inches, and if the chimney is to be but 81 feet high, itshould have this area, which would require a flue 6 ft. 5^ But, suppose, for some reason, it is decided to have a chimney150 feet in height, instead of 81 feet. The square root of 150is 12^ ; the square root of 81 is 9 ; and we reduce the area of thechimney by the following proportion: : 9=6,017: 4,420<quare inches, which would be the proper area, and would calllor a chimney 5 ft. 6 in. square, and similarly if any othettieight were decided upon. Maxims and
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectsteamen, bookyear1917
