. The street railway review . n be savedby heating the feed to the steam temperature. The heat returnable by the feed is, of course, less than in the case of the actualengine, owing to the reduced weight of steam passing through tneengine. The heat supplied to the ideal engine is therefore; B. T. U. Gross supply Less returned by feed 5,000 Net heat supplied per minute 95,300 The i. h. p. of the ideal steam engine being the same as that ofthe actual engine, the number of B. T. IT. per minute areutilized as work upon the piston, namely, 27,260. The thermalefficiency of this ideal s
. The street railway review . n be savedby heating the feed to the steam temperature. The heat returnable by the feed is, of course, less than in the case of the actualengine, owing to the reduced weight of steam passing through tneengine. The heat supplied to the ideal engine is therefore; B. T. U. Gross supply Less returned by feed 5,000 Net heat supplied per minute 95,300 The i. h. p. of the ideal steam engine being the same as that ofthe actual engine, the number of B. T. IT. per minute areutilized as work upon the piston, namely, 27,260. The thermalefficiency of this ideal steam engine is therefore )-^95,300= and the B. T. U. per minute per i. h. p. are 95,300-;-G43=148,iis against 221 for the actual engine. The actual engine, there-fore, requires 73 B. T. U. per minute per i. h. p. more than the idealengine; these heat-units are lost on account of imperfections mthe actual engine, and can be looked upon as a measure of theseimperfections. The ideal steam engine thus becomes the stan-. za/77/?<?A«A^/e \3aturoted^ 3teamG,t Cnrranee- ^
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
