Ripper, William, 1853-1937 · London, New York [etc.] : Longmans, Green and co. · leaf 518
ack pressure,expansion. Obtain this expression, andprove that the maximum work per cubic foot of steam is obtained when r = , Ihneglecting all losses. (Shefheld Univ.) Answer.—Let the cross-hatched area inFig. 491 represent the hypothetical dia-gram, the expansion curve following thelaw PV =… … Total area of diagram = p,i|mean pressure or average height = -^J— Fig. 491. log, r + v,{p3 - Pi)log, r + i;,(p, - pd p, log,. »• + iPi~ P2) Also P3 = mean pressure = 7),(1 + log,, ?■) -P2 494 QUESTIONS WITH SOLUTIONS. Let P,„ = mean pressure per square foot. V = volume of the cylinder in cubic…
Steam-engines
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