Heat engineering; a text book of applied thermodynamics for engineers and students in technical schools . Fig. 92.—Card from engine forClayton analysis. log Vt, — log Vi 1 Trans. A. S. M. E., 34, p. 58, Engineering Experiment Station, Univ. of 65. (62) THE STEAM ENGINE 211 The variation of this line from a straight line, as shown in thefigure, would indicate leakage. Point Volume in fifths inches from clearance line Logarithm of volume in fifths inches + 1 Pressures in fifths inches from absolute zero Logarithm of pressure in fifths inches + 1 1 1.
Heat engineering; a text book of applied thermodynamics for engineers and students in technical schools . Fig. 92.—Card from engine forClayton analysis. log Vt, — log Vi 1 Trans. A. S. M. E., 34, p. 58, Engineering Experiment Station, Univ. of 65. (62) THE STEAM ENGINE 211 The variation of this line from a straight line, as shown in thefigure, would indicate leakage. Point Volume in fifths inches from clearance line Logarithm of volume in fifths inches + 1 Pressures in fifths inches from absolute zero Logarithm of pressure in fifths inches + 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 . 18 19 20 2 Logarithm of Volume Fig. 93.—Logarithmic diagram of steam engine indicator card. In preparing the table, distances to the true zero of pressureand of volume have been found and then the distances from theselines to any point have been measured in fifths of an inch. Thelogarithms of the numbers have been increased by unity to have 212 HEAT ENGINEERING all of the numbers positive for plotting. This only shifts thelines but does not change the slopes. The logarithms are then plotted giving the figure which alsoshows the true point of closing or opening of the valve as the pointat which the straight line begins marks the beginning or endingof the expansion or compression. This is of value as the events,especially compression are difficult to fix accurately on the indi-cator card. On investigating tests on which the quality of the steam in thecyl
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1915
