Bulletin (1904) (14783799362) - Steam locomotive, Public domain image

Identifier: bulletinu08univ (find matches)
Title: Bulletin
Year: 1904 (1900s)
Authors: University of Illinois (Urbana-Champaign campus) Engineering Experiment Station
Subjects: Engineering
Publisher: Urbana
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: University of Toronto



Text Appearing Before Image:
its coal. Savings in connection with locomotivefriction are largely matters of proper maintenance of the locomotiverunning parts and of careful lubrication. The heat losses so far considered are those which to a greater orless extent exist under normal conditions, or with the locomotive inwhat may be called good operating condition. Most of these lossessuch as the radiation loss, the loss of heat out of the stack, or the heatwhich goes to the performance of work necessary to the operation ofair pumps or draft apparatus are in part unavoidable. With thelocomotive in poor condition, these losses will be larger. In likemanner if the locomotive is not skilfully fired and operated, most ofthese losses will be increased. The opportunity for saving comes inreducing these losses to the lowest possible amounts through betterdesign, better maintenance, and skilful engine operation and firing. HEAT IN EXHAUST STEAM 51%LOSS TO HEAT IN GASES 14%LOSS TO CINDERS 6% LOSS TO UNBURNED GASES AND SOOT 4^
Text Appearing After Image:
Fig. 2. Heat Distribution in the Locomotive Combustion iu llio lin-liux libcriitcH lieiit from tlie coal.CoiubuBliou is not comjikti!, uud nil tlio lieiit of the coal i» r bustiblu KKSCs cscajic unliurticd fiori) Ilic firebox nnSomo of the liout liberulcd from the coul is ciiiTicd out of thi and coiil ut a temimraturo of say 70 degrees P. go i thoy form come out of the Black at 500 or GOO dcgri whiih gavs into tlie firebox about 12 tons c gases pass out of the stack. It takes some of the hciit of the ton of coal to heat these i;i tons of gases from 70 dcgreeB to 000 degrees.Tbo bent liberi.ttd in tlie firebox, oxcoiit that which is used to heat the stack gases, passes through the firebox sheets, tbo boiler tubes, and the superheater units to the -n-stcr and steam. , liberated. Cinders and comTiass nut tbroucb the slack.Jtack by tbo stack gases. AirI the firebox; tbe gases whichFor each ton of coaland about 13 tons of I used for auxiliary purposes, is lost as leaks, or goes to the cyl