. The street railway review . to direct contact with the superheater surface. Whateverthe type of superheater may be, the velocity of the steam is closelyrelated to the desired degree of superheat and the location of theapparatus with respect to the flue gases, this latter depending uponthe type of the boiler. Fig. 7 represents a Gochrig-Leuchs (Darm-stadt) superheater located in the first and second passes of thefurnace gases. It is a narrow tube type, and it will be noticed thatthe flow of steam is combined parallel and counter current. Thesteam enters at the outside ends and leaves at the m
. The street railway review . to direct contact with the superheater surface. Whateverthe type of superheater may be, the velocity of the steam is closelyrelated to the desired degree of superheat and the location of theapparatus with respect to the flue gases, this latter depending uponthe type of the boiler. Fig. 7 represents a Gochrig-Leuchs (Darm-stadt) superheater located in the first and second passes of thefurnace gases. It is a narrow tube type, and it will be noticed thatthe flow of steam is combined parallel and counter current. Thesteam enters at the outside ends and leaves at the middle, a damperbeing so arranged that the passage of furnace gas may be superheater, as illustrated in this boiler, has a heating surfaceequal to one-half that of the boiler itself, and will therefore assurethe highest superheat which can be used only in a first class primemover. Another practice is illustrated in Fig. 8, representing a Heringsuperheater located practically in an additional compartment attached. to the setting of a lulnilar boiler. It will be noticed that the gasleaves the boiler setting, passes through the superheater and re-turns to the boiler and escapes below the superheater setting. Thisis a parallel-current superheater. In- both of the mentioned typesthe travel of the gas is at right angles to the flow of steam. A system frequently used, in which the steam runs with the as the flow of gas and, which at the same time is a parallel and Dec. 15, IQ05.] STREET RAILWAY REVIEW 861 counter-ciiirciil limllncr type, is shown in Vik- 9- ic tubes ofthis system, it is claiincil, ;iro of such strong and <lura1)lc materialthat the necessity for a regulating dainper is eliminated. A different type of superlieater lias its detail of ■.howii in Fig. 10. The tubes of the su|ierheater take the place ofa horizontal row nf water tubes of a boiler, and the superheater mayoceujiy a lower or higher position according tn the- amount of s
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
