Steam power plants, their design and construction . -CCXCC^lT)< the required capacity for a given horse-power in the plant by thiscapacity per inch and it will determine how wide the fan shouldbe at the periphery, with the increased diameter and the slowerspeed. The horse-power can be determined by multiplying thiswidth by the horse-power per inches in width. ^^T^. I Vertical Chimney Lincoln Whaei? Station, BostonElevated Railway Company. GEORGE A. KIMBALL, CH. ENGR. Plate 15. Chimney for U. S. Goveknment, Manila, P~ -TRONG, CON. ENGr; EDWARD BARROTH. ARCi Chapter X.—Chimneys. Sis
Steam power plants, their design and construction . -CCXCC^lT)< the required capacity for a given horse-power in the plant by thiscapacity per inch and it will determine how wide the fan shouldbe at the periphery, with the increased diameter and the slowerspeed. The horse-power can be determined by multiplying thiswidth by the horse-power per inches in width. ^^T^. I Vertical Chimney Lincoln Whaei? Station, BostonElevated Railway Company. GEORGE A. KIMBALL, CH. ENGR. Plate 15. Chimney for U. S. Goveknment, Manila, P~ -TRONG, CON. ENGr; EDWARD BARROTH. ARCi Chapter X.—Chimneys. Sise of Chimneys.—There are two factors that affect the ca-pacity of a chimney, its cross-sectional area and its height. Theintensity or force of draft is proportional to the square root ofthe height of the chimney, and, for a given height, the capacityis directly proportional to its cross-sectional area within certainlimits. Earlier in this book attention has been called to theimportance of having a strong draft in order that cheap, low-grade fuels may be burned successfully, and also, that there maybe sufficient reserve capacity in the boilers at times of abnormaldemands. In this latter respect ample draft is just as good as ad-ditional boiler-heating surface, and, as a general proposition, itcosts less. Although an engineer once said that high chimneysare
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