Steam power plants, their design and construction . rmined the cylinderdimensions, the rotative speed, steam pressure, and whether theengine is to be run condensing or non-condensing; hence thespecification should give: Diameter and stroke of cylinders;number of revolutions per minute; horse-power to be developedwhen working at highest efficiency; horse-power at maximumload; steam pressure; back pressure if run non-condensing, orvacuum if run condensing. As before stated, an engineer should not be too rigid in regardto cylinder dimensions, and it is well, particularly when purchas-ing high-spe
Steam power plants, their design and construction . rmined the cylinderdimensions, the rotative speed, steam pressure, and whether theengine is to be run condensing or non-condensing; hence thespecification should give: Diameter and stroke of cylinders;number of revolutions per minute; horse-power to be developedwhen working at highest efficiency; horse-power at maximumload; steam pressure; back pressure if run non-condensing, orvacuum if run condensing. As before stated, an engineer should not be too rigid in regardto cylinder dimensions, and it is well, particularly when purchas-ing high-speed or medium-speed engines, to state in the specifica-tions that engines with cylinder volumes equivalent to thosespecified will be considered. There are objections to an enginewith too short a stroke in proportion to the area of piston; thesewere stated in the preceding chapter. If the engine is to be runcondensing and the builder is to supply the condenser, provisionshould be made for it. The engineer should describe in a general way the kind of.
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