An Elementary Text book On Steam Engines And Boilers for the Use of Students in
An Elementary Text book On Steam Engines And Boilers for the Use of Students in
John Henry Kinealy
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The ratio obtained may, or may not, be the same for both ends of the cylinder. 56. To FIND THE WEIGHT OF STEAM USED PER HOUR PER HORSE-POWER. Take any point, /, near the end of the expansion line, and through it draw the line fg parallel to AB and intersecting the compression line at^. Let the ratio obtained by dividing the length offg by the length of AB be denoted by X. The volume of the steam, at the pressure by the gauge equal to the pressure corresponding to hf t that is used per stroke is... equal to the volume swept through by the piston, in one stroke, multiplied by X. Since the volume, in cubic feet, swept through by the piston per stroke is LA XLA , the volume of steam used per stroke is . 144 144 If the number of strokes made per minute is N, the number made per hour will be 60 A 7 ", and the volume of steam, at a gauge pressure corresponding to hf y used per hour will be GO XL AN $ XL AN 144 ~12~ STEAM ENGINES AND BOILERS. Let s be the volume, in cubic feet, of one pound of steam at the gauge pressure corresponding to the pressure /{/", as obtained from Table I ; then the weight of steam used per hour by the engine will be s 12 s From (54), we have that the horse-power of the engine If.
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