. Bulletin . deg. C. An instrument with a shorter range would probablygive better results. During the operation of the apparatus the temperature recordershows a minimum at the dew-point. When the dew forms, the currentin the heating coil is momentarily turned on and the temperature risesuntil the film breaks. The rise in temperature shown by the recorderduring the evaporation will depend on the rate of the heating of theair and the velocity with which the flue gases sweep the glass rate of heating was adjusted by means of a 30-ohm rheostat inseries with the heating current. The vel
. Bulletin . deg. C. An instrument with a shorter range would probablygive better results. During the operation of the apparatus the temperature recordershows a minimum at the dew-point. When the dew forms, the currentin the heating coil is momentarily turned on and the temperature risesuntil the film breaks. The rise in temperature shown by the recorderduring the evaporation will depend on the rate of the heating of theair and the velocity with which the flue gases sweep the glass rate of heating was adjusted by means of a 30-ohm rheostat inseries with the heating current. The velocity of the flue gases wascontrolled by means of the air aspirator used to create the the best performance a rise of about 30 deg. C. was used. At thisrate about twenty cycles of the instrument an hour were convenience, a small lamp bulb of 25 watts was shunted acrossthe heating coil to indicate when the instrument was operating cor-rect! v. 14 ILLINOIS ENGINEERING EXPERIMENT STATION. Hi §^ > •$> ^ /so /oo so ^ = /?afe of- _E^a/oor-a/L/&/7_ eoOa&gr. C /OO ~Dew Po/nf- Soof B/ow/rrg^ Fig. 5. Fluctuations of Dew-point and Boiler Eyaporation-Loav Sulphur Coal DETERMINATION OF DEW-POINT OF FLUE GASES 15
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectenginee, bookyear1904
