. Railway age gazette . ated steam. The steam thenpasses directly to the cylinders. This and similar arrange-ments are called in this paper two-pass superlieaters. Thesuperheater elements are connected to the header by a ball-joint connection, the ends of each element being drawn up tothe header and held in place by a single bolt. In order to obtain different degrees of superheat without inany way changing the water-heating surface of the boiler orthe engine conditions, different forms of superheater elementswere used, maintaining the same superheater header and largeflues. The details of the
. Railway age gazette . ated steam. The steam thenpasses directly to the cylinders. This and similar arrange-ments are called in this paper two-pass superlieaters. Thesuperheater elements are connected to the header by a ball-joint connection, the ends of each element being drawn up tothe header and held in place by a single bolt. In order to obtain different degrees of superheat without inany way changing the water-heating surface of the boiler orthe engine conditions, different forms of superheater elementswere used, maintaining the same superheater header and largeflues. The details of the arrangements are indicated in and 2. One element of the standard superheater is shown atH in Fig, 2. •From a paper read before the Franklin Institute, Philadelphia, April 30,1914. In Fig. 1, A is simply an element at the header of which iimight be said that when all of the elements arc in place theyform a smokebox superheater; 5 is a quarter-length super-heater. The superheater C is one-half length and D three-. Fig, 2—Superheater Elements The standard and special or altered forms; G. extra length. 20 ft. 5 ; H, standard, 19 ft. long; /, Y^ return, 19 ft. long; A, J2 return,19 ft. long; L, Ya, return, 19 ft. long. quarter length; £ and F are of the same length as the stand-ard, but of one pass; F, however, has additional pipes rep-resenting the second pass, but having no steam flowing through 300 1 A lETu ■1 ■^ 1^ *r t ;TR* LCN{ TH ^ ■k- ^ a kftD > ^ u o 250 ^ ^ A. *^ y RET JRN i/ \A ^ ^ Z-i T^ y /^ r 1 / y Y* JHH . COO / 0 / ^ X NGt X /. / / ^ ^ <!. ~Ti u / A / ,y 0^ ^ ^ / : Lt *eT « a. y y y^ ^y ^ ^ 100 A ^ 1^ ^ ^ ^ /^ /■ y _^^ —a T > y> -* -^ y LCH 6TH - y 50 ^ r^ ,^ *o(r ni \im,i f 4^ -J 25000 30000 35000 40000 45000 50000 55000EVAPORATION, POUNDS PER HOUR Fig. 3—Superheat and Evaporation The superheat increases with an increase in evaporation up
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1913
