Identifier: streetrailwayjo221903newy (find matches)
Title: The Street railway journal
Year: 1884 (1880s)
Authors:
Subjects: Street-railroads Electric railroads Transportation
Publisher: New York : McGraw Pub. Co.
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
expanded into the steel headers, and the joints are notexposed but are protected from direct heat of the products ofcombustion as shown; the superheating surface comprises,therefore, the net exposed tube surface only. In designing thesuperheater the manufacturers have obtained a construction ofheaders and tubes which gives perfect freedom for expansionand contraction, a simple and effective heating surface occupy-ing little space and affording a long dwell of the steam in thetrack of the combustion products, as well as a thoroughmingling of all the steam particles at their entry into eachsucceeding header; this periodic intimate mixing action pro-ducing a condition which is a necessary one for rapid and 99Q STREET RAILWAY JOURNAL. (Vol. XXII. No. 23. economic transfer of heat through the tube surfaces. Thevertical fire tiles protect the asbestos blocks from any abrad-ing action of the impinging products of combustion, whilethe non-conducting material between the tiles and the headers
Text Appearing After Image:
EXTERIOR OF INDIANAPOLIS & NORTHWESTERN CAR affords insulation of the header surfaces. The dead-airspace between the headers and outer casings of the super-heater, combined with the above-described insulation, producesa degree of header temperature in operation but little abovethat of the steam itself, while the thick non-conducting liningof the casing plates reduces the heat loss by external radiationto a minimum. Superheaters of this type are delivering steam at tempera-tures of 600 degs. F., and it is said that the cost of repairs hasbeen practically nil, although the superheaters have been in usefor about three years, under frequent and sudden variations ofsteam. The company is prepared to fill all requirements ofcapacity, pressure and temperature. The flexibility of design admits of the superheater beingplaced in positions where either the floor space or the headroom is limited. The under truss is made of 1^5-in. round iron, with a il/2-m.turnbuckle in the center and M. C. B.

Note About Images