. Bulletin. fuelwill have become more or less bright on top, by this time), the over-draft through the fire door should be partly closed and the ash-pitclamper left partly open. In mild weather, both the ash-pit damperand the overdraft should be closed to prevent the coked fuel now leftin the fire from burning out too quicky. In case the fire must be checked still further, as is true for mostof the heating season, the check damper (Fig. 3) in the smoke pipemust be opened in order to decrease the draft or suction action of the 1 PURCHASE AND USE OF COAL FOR HEATING HOMES 49 chimney by admitting
. Bulletin. fuelwill have become more or less bright on top, by this time), the over-draft through the fire door should be partly closed and the ash-pitclamper left partly open. In mild weather, both the ash-pit damperand the overdraft should be closed to prevent the coked fuel now leftin the fire from burning out too quicky. In case the fire must be checked still further, as is true for mostof the heating season, the check damper (Fig. 3) in the smoke pipemust be opened in order to decrease the draft or suction action of the 1 PURCHASE AND USE OF COAL FOR HEATING HOMES 49 chimney by admitting cold air directly into the flue. This is the casewhen the fire is to be carried overnight without burning out, but thereshould be no attempt to hold a fire in this way unless there is agood bed of fairly well coked fuel already in the fire pot. Always leta fresh fuel charge burn up somewhat, with overdrafts at fire levelopen, before attempting to carry it for a considerable period with anopen check Fig. 22. Third Stage of the Coking Method of Firing in Which the Entire Fuel Bed Has Become Incandescent and Is Burning with a Short Flame Which Gives Off No Smoke Method of Firing.—In order to promote economy, fire atfairly regular intervals, and put on comparatively small charges ofcoal frequently rather than large charges at much longer is recognized that infrequent firing of large quantities of coal maybe the more convenient method, but such convenience can, with theordinary heater, be obtained only at the sacrifice of economy. Largecharges of coal and infrequent firing will increase the chimney lossesdue to the production of unburned gases just after firing. Employ the coking method of firing (Figs. 20 to 22) in so far aspossible, that is, spread the fresh coal upon a portion of the fire bed \ 50 ILLINOIS ENGINEERING EXPERIMENT STATION only, leaving a portion of the fire glowing brightly (Fig. 20) so thatthe gases which rise from the freshly fired coal m
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectenginee, bookyear1904
