. The Street railway journal . ARRANGEMENT OF BUILDINGS lutely free from water. The circulating- pump is of thepositive type, of high efficiency, and both this and the airpump are driven by an economical engine provided witha capacity regulator. This circulating pump only handlesthe cold injection water, the hot water passing out auto-matically through a barometric column, or so-called waterleg. Many advantages are obtained by the use of this centralcondenser, and it is said that the amount of power re- fer the air or water to pass through, which can becomeclogged or congested, causing a dropp
. The Street railway journal . ARRANGEMENT OF BUILDINGS lutely free from water. The circulating- pump is of thepositive type, of high efficiency, and both this and the airpump are driven by an economical engine provided witha capacity regulator. This circulating pump only handlesthe cold injection water, the hot water passing out auto-matically through a barometric column, or so-called waterleg. Many advantages are obtained by the use of this centralcondenser, and it is said that the amount of power re- fer the air or water to pass through, which can becomeclogged or congested, causing a dropping of the the same time the amount of water fed to the condenseris automatically regulated by the positive displacementrotary pump, which is driven by the air pump engine. Inthe usual condenser a sudden increase in the load, or aleak, lessens the vacuum, which in turn reduces the quan-tity of water, causing a still poorer vacuum; whereas inthe Weiss system the water is pumped in entirely inde-. Street Railway Journal, PLAN AND SIDE ELEVATION OF EXHAUST PIPING quired to drive the condensing machinery is only a frac-tion of that required by the usual jet condensers. It isalso claimed that this condenser uses only one-half to two-thirds the amount of cooling water necessary for a jet orsurface condenser, and again, the height that the condens-ing water has to be lifted is not so great in the Weiss con-denser as it is in an ordinary condenser using a wet airpump, there being a balance due to the height of thewater in the barometric tube or water leg. The hot wellof this condenser is hotter than with any other, as thetemperature of the overflow can be the same as that ofthe exhaust steam. In other words, it obtains without costthe same effect as would be produced by a feed waterheater in the exhaust pipe. For these reasons, and on ac- pendent of the vacuum. An increase of load, howeversudden or severe, does nothing except slightly lessen thevacuum. A back flowr of wa
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
