Thermodynamics of the steam-engine and other heat-engines (1889)
Peabody, Cecil Hobart, 1855-1934 · New York, Wiley & Sons · leaf 393
Ob represents the volume of M pounds ofsteamx admitted at the absolute pressure of 50 pounds. \a 368 THERMODYNAMICS OF THE STEAM-ENGINE. represents the total work done during the admission, of which\b must be expended in overcoming the back pressure duringexhaust, leaving the useful work ab. The… … Fig. 71. back pressure, and the portions cd, ef, etc., represent the usefulwork. The limit of useful expansion is that at which the use-ful work becomes a maximum. The line xy is drawn throughthe points on the curves for the several pressures, beyond whichlittle or no gain is obtained from further…
Thermodynamics · Steam-engines · Heat-engines
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