Question 3.9: Steam is admitted to an engine for 35% of the stroke with a ...
Steam is admitted to an engine for 35% of the stroke with a pressure of 7.2 bar, the law of expansion followed is pV^{1.1} = constant. Compression starts at 55% of return stroke and follows the law pV^{1.2} = constant, the clearance volume is 20% of the displacement volume and the back pressure is 660 mm of mercury vacuum when barometer reads 760 mm of mercury. Estimate the mean effective pressure and indicated power of a double-acting engine with cylinder diameter 320 mm, stroke 480 mm and speed 200 r.p.m.
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