. The street railway review . nection lines between the two halves the arrangement would be asshown by Fig. 18. Having decided upon the general arrangement of the economizersand boilers, the piping should now be laid out in a detailed system should be made as reliable and as flexible as that shownin Fig. 14 and by tracing out Fig. 15 it will be seen that the followingconditions are readily secured: I. Regular operation of No. i pump on fire line and house Fiiii. 15, fJOS-. STREET RAILWAY REVIEW. 107 service; No. - ininili H main for lulic cleaning; No. .3],iiiiip nil fe
. The street railway review . nection lines between the two halves the arrangement would be asshown by Fig. 18. Having decided upon the general arrangement of the economizersand boilers, the piping should now be laid out in a detailed system should be made as reliable and as flexible as that shownin Fig. 14 and by tracing out Fig. 15 it will be seen that the followingconditions are readily secured: I. Regular operation of No. i pump on fire line and house Fiiii. 15, fJOS-. STREET RAILWAY REVIEW. 107 service; No. - ininili H main for lulic cleaning; No. .3],iiiiip nil feed mains. J. Tile meter can lie used willi eillu-r |inni|i .No. 2 or No. .3 orwilli holli; llie discliarge from llic mcler can lie fed lo the main,auxiliary main or to botli at the same time; tlic meter can delivertlirongli one or more economizers with either lieater water or coldwater; it can also feed direct to tlie boilers hy passing one or moreeconomizers. •, Thi- l„, villi cc ff£^£> Pi/Af^ f /^//P£ Pt/Z^A. ^S 3. Any one inimp may be shut down without interfering witliregular operation; any two pumps may be shut down and still main-tain pressure on the feed main and the house service, using coldwater or water from the hot well in the economizers. 4. When an economizer is sliut olT the boilers wliicli regularly boiler which burned the greater amount of coal would be heating thefeed water for the other boiler. The chief rc(|uircments for a boiler feed syMein arc well caredfor in Fig. ly. They are as follows: 1. Any part of the feed system may be shut ofT without reduc-ing the capacity more than onc-foiirlh, for four units. 2. The hot well water may be fed to the economizers when theheater is off. iiiomizers off may lake their fccil fromany other economizers which are inoperation. 4. An abundance of feed reserveis provided for. I here arc various other systems ofmetering which might be employedsuch as a separate meter for eachIjoiler, or as shown in Fig.
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
