. Electric railway review . tower are all quite similarin their general construction and operation. Details shownin Fig. 265 (I 9-1) are common to all makes. The water isdistributed over the tower filling at the top and allowed topercolate through the filling downward against the risingcurrent of air. The different forms of filling furnished bythe manufacturers of water towers are ordinarily rated at1 to square feet of cooling surface per pound of steamcondensed and the cost of the cooling tower materials, notincluding the foundations, brick lining, motor to drive theIan nor cost of erec
. Electric railway review . tower are all quite similarin their general construction and operation. Details shownin Fig. 265 (I 9-1) are common to all makes. The water isdistributed over the tower filling at the top and allowed topercolate through the filling downward against the risingcurrent of air. The different forms of filling furnished bythe manufacturers of water towers are ordinarily rated at1 to square feet of cooling surface per pound of steamcondensed and the cost of the cooling tower materials, notincluding the foundations, brick lining, motor to drive theIan nor cost of erection, is generally from 10 to 14 cents persquare foot of cooling surface. The height of the tower isgenerally about 32 or 33 feet, measured from the top to thebottom of the metal casing. The metal casing is calked sothat the water will not leak through the seams. The lowest section of the casing would ordinarily be notless than % inch and the top section not less than V8 inch I I t f V I ■.Ormiiuin nimiiiinmn4 iimniiiiii. Figure 265-09-1). thick. The distributor is supported on hollow brass ballsand the bearing surfaces of the sleeves at the end of thedischarge pipe are of brass to insure that the distributorwill revolve with but very slight pressure at the nozzles. TheI-beams shown to support the filling, rest on the brick air at the base of the tower being under a slight pres-sure, the water seal shown is required where the water isdischarged from the tower to a storage basin as it pre-vents air from passing through this opening. The size offan required does not appear to be standardized among thedifferent manufacturers, as those supplied vary from two 8-foot to two 10-foot fans to supply the draft for a tower for30,000 pounds of steam per hour. Different manufacturers employ different materials forthe cooling surfaces. The most commonly used material iswood, the most satisfactory wood for this purpose beingswamp cypress, in surfaced boards 1 inch by 8 inches set
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectstreetr, bookyear1906
