The Schulz Steam Turbine for Land And Marine Purposes With Special Reference to
The Schulz Steam Turbine for Land And Marine Purposes With Special Reference to
Max Dietrich
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Curves 8 and 9 give the work done by the screw when the boat is stationary and when it is in motion respectively. Curves 10 and 12 give the steam consumption per hour. Curves 11 and 13 give the steam consumption per horse-powei per hour. 45 The excess pressure of the driving steam at this trial varied approximately from 200 to 213 Ibs. Per square inch. The super- heating of the steam was generally about 160 to 180 cleg. F. ; in some cases, however, it amounted to more than 780 deg. F. The vacuu...m was never more than 9'4 Ibs. Per square inch. A better vacuum could not be obtained, owing to the insufficient output of the air-pump. When the comparatively small peripheral velocities of the first and last turbine wheels (100 and 165 feet a second) are con- sidered, the results shown by Table III. And by the curves in Figs. 25 and 26 must be considered excellent. With an output of 195 horse-power and a speed of 2, 200 revolutions per minute, only 22 Ibs. Of steam per horse-power per hour were used, in spite of the bad vacuum of 9'4 Ibs.
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