File:Applied thermodynamics for engineers (1913) (14766386765).jpg

Identifier: appliedthermodyn01enni (find matches)
Title: Applied thermodynamics for engineers
Year: 1913 (1910s)
Authors: Ennis, William Duane, 1877-
Subjects: Thermodynamics
Publisher: New York, Van Nostrand
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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rged through holes in the cylinder waU, so that it ceases to be a factor inproducing further condensation. SOSrThe Steam Power Plant. Figure 233, from Heck (46), isintroduced at this point to give a conception of the various elementscomposing, with the engine, the complete steam plant. Fuel is burnedon the grate 1; the gases from the fire follow the path denoted by thearrows, and pass the damper 4 to the chimney 5. Water enters, fromthe pump IV, the boiler through 29, and is evaporated, the steampassing through 8 to the engine. The exhaust steam from the enginegoes through 18 to the condenser III, to which water is brought through21. Steam to drive the condenser pump comes from 26. Its exhaust,with that of the feed pump 31, passes to the condenser through 27. Thecondensed steam and warmed water pass out through 23, and should, ifpossible, be used as a source of supply for the boiler feed. The freeexhaust pipe 19 is used in case of breakdown at the condenser. 352 APPLIED THERMODYNAMICS
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509. The Locomotive. This is an entire power plant,made portable. Figure 234shows a typical modern form.The engine consists of twohorizontal double acting cyl-inders coupled to the ends ofthe same axle at right an-gles. These are located un-der the front end of theboiler, which is of the typedescribed in Art. 563. Apair of heavy frames sup-ports the boiler, the load be-ing carried on the axles bymeans of an intervening spring rigging. The stackis necessarily short, so thatartificial draft is provided bymeans of an expanding noz-zle in the smoke box,through which the exhauststeam passes; live steammay be used when necessaryto supplement this. Theengines are non-condensing,but superheating and heat-ing of feed water, particu-larly the former, are beingintroduced extensively. Thewater is carried in an aux-iliary tender, excepting inlight locomotives, in which a saddle tank may be builtover the boiler. The ability of a locomo-tive to start a load dependsupon the force which it canexert at

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