Reeve, Sidney A. (Sidney Armor), 1866-1941 · New York, London, The Macmillan Company · leaf 269
be chosen; say at 252 THE THERMODYNAMICS OF HEAT-ENGINES 8 pounds absolute. This establishes the total ratio ofexpansion at 1$£ = 20. Let it be assumed that the vacuumto be expected in the cylinder is 25 inches, or 12^ poundsbelow atmospheric pressure, or 2\ pounds absolute. Referring to Fig. 42,… … Fig. 42 on page 122): Work = Py V[ log r. The final volume at-tained by the steam, at the end of the stroke in the largestcylinder, will be represented by Fy. Let this be repre-sented by Vy, in cubic feet. Then, since P1 = 8x 144 =1152 pounds per square foot and r= 20, the work repre-sented by the…
Thermodynamics · Heat-engines
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