 | William John Macquorn Rankine - Heat engineering - 1870 - 638 pages
...TI= ^| =2Ar2; (10.) [therefore, the best chimney-draugJti takes place when the absolute tanperatuire of the gas in the chimney is to that of the external...air as 25 to 12. When this condition is fulfilled, we have evidently A = H; (11.) Wat is, the head for the best chimney-draught, expressed in hot ifM,... | |
 | Thomas Minchin Goodeve - Steam - 1879 - 364 pages
...formulse for computing the height of a chimney in order to produce a given draught, and states that the best chimney draught takes place when the absolute...chimney is to that of the external air as 25 to 12, or when the density of the hot gas is one-half that of the external air. For example, if the temperature... | |
 | Albert Edward Seaton - Marine engineering - 1886 - 514 pages
...at its base should be about that of melting lead, or nearly 600°. Professor Eankine states that " the best chimney draught takes place when the absolute...chimney is to that of the external air as 25 to 12." That is, if T be temperature of the air, then, 25 Absolute temperature at the base of funnel = --^... | |
 | Emory Edwards - Steam engineering - 1888 - 540 pages
...formula for computing the height of a chimney in order to produce a given draught, and states that the best chimney draught takes place when the absolute...chimney is to that of the external air as 25 to 12, or when the density of the hot gas is one-half that of the external air. For example, if the temperature... | |
 | Robert Wilson - Chimneys - 1888 - 136 pages
...theory of draught of Morin the best chimney draught takes place when the absolute temperature of the hot gas in the chimney is to that of the external air as 2y to 1 approximately> or when the head in hot gas h = H ; that is, when the density of the hot gas... | |
 | De Volson Wood - Heat-engines - 1889 - 500 pages
.../*•'?:This will be a maximum for r - ri - 2 AT • 1 ~ 0.48 " 12 " that is, the best chimney draft takes place when the absolute temperature of the gas...chimney is to that of the external air as 25 to 12. This in the preceding equation gives A = //. In the solution for a maximum, l is considered constant,... | |
 | Charles Edward Groves, William Thorp, William Joseph Dibdin - Chemistry, Technical - 1889 - 850 pages
...discharged per second. This may be found by calculation, which shows that "the best chimneydraught takes place when the absolute temperature of the gas...chimney is to that of the external air as 25 to 12," or when the density of the hot gas is one-half that of the external air. Bankine adds that it may be... | |
 | Charles Edward Groves - 1889 - 862 pages
...discharged per second. This may be found by calculation, which shows that "the best chimneydraught takes place when the absolute temperature of the gas...chimney is to that of the external air as 25 to 12," or when the density of the hot gas is one-half that of the external air. Rankine adds that it may be... | |
 | De Volson Wood - Heat-engines - 1889 - 506 pages
...T, This will be a maximum for T - -TL - 2 l T • i 0.48 12 " that is, tlie best chimney draft takm place when the absolute temperature of the gas in...chimney is to that of the external air as 25 to 12. This in the preceding equation gives h = H. In the solution for a maxim um, I is considered constant,... | |
 | De Volson Wood - Heat-engines - 1889 - 520 pages
...L 13 1 This will be a maximum for T' = 0^8 = 2 12 that is, the best chimney draft takes place w/im the absolute temperature of the gas in the chimney is to that of the external air as 25 to 12. This in the preceding equation gives h = E. In the solution for a maximum, / is considered constant,... | |
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Therefore the best chimney draught takes place when the absolute temperature of the gas in the chimney is to that of the external air as 25 to 12. 
