. Journal of electricity. component the pro-portion by weight is .1182; for the carbon monoxidecomponent it is .0103; and for the nitrogen componentwe have .7453. As a check on our work we find thatthe sum of these separate components is unity as itshould be. Or expressed in percentages, we wouldhave for a volumetric analysis consisting of percent carbon dioxide, per cent oxygen, per centcarbon monoxide, and per cent nitrogen; that thepercentages by weight become per cent carbondioxide, per cent oxygen, per cent carbonmonoxide, and per cent nitrogen, wh
. Journal of electricity. component the pro-portion by weight is .1182; for the carbon monoxidecomponent it is .0103; and for the nitrogen componentwe have .7453. As a check on our work we find thatthe sum of these separate components is unity as itshould be. Or expressed in percentages, we wouldhave for a volumetric analysis consisting of percent carbon dioxide, per cent oxygen, per centcarbon monoxide, and per cent nitrogen; that thepercentages by weight become per cent carbondioxide, per cent oxygen, per cent carbonmonoxide, and per cent nitrogen, which foot up100 per cent in either case and thus check our work. A Suggested Form of Tabulation.—To expeditecomputation the work set forth in the above discussionmay be tabulated. Below we have a form of tabulationwhich will prove useful for such transformations: mV Constituents Volume M ol. Wt. mV cs .1270 CO., .086 44 O, .11 32 .1182 CO .011 28 .308 .0103 N„ .793 28 cs = .7453 A PORTABLE PYROMETER OUTFIT For the Beady measurement of temperatures in and about the powerplant, a portable type of pyrometer is often convenient. In theillustration shown temperatures may be read from 200°F. to 2200° an instrument as the one shown is very convenient in ascer-taining- the flue gas temperatures when the Orsat analysis is being:taken. Weight of Air Theoretically Required for PerfectFuel Oil Combustion.—For economic combustion inthe furnace a certain percentage of air over and abovethat theoretically required for perfect combustion isnecessary. This is due to the fact that it is practicallyimpossible to bring all of the entering air into intimatecontact with the heated carbon, hydrogen, and othercombustible ingredients of the fuel; consequently,unless an excess of air is admitted some of these in-gredients will pass out of the chimney practice dictates from 40 to 50% excess air asthe proper ratio for economic fuel oil
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