Bulletin - Engineering Experiment Station Volume 75-80

Bulletin - Engineering Experiment Station Volume 75-80

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1915 edition. Excerpt: ...to it subsequent to taking the weight and the temperature of the latter, the result is essentially the same as though the closed system had been used, and no account need be taken of the water thus circulated. In the present case, however, the temperature was taken close to the boiler and after the circulating water had gone into the feed water. The water-back has, therefore, been considered as part of the heating surface of the boiler and the heat absorbed by the circulating water has been reduced to terms of equivalent water evaporated and added to the boiler output as discussed under feed water corrections in the Appendix. 10. Flue Gas.--Flue gas samples were collected over half-hour periods. One sample was taken at the breeching about 2 ft. below the dampers and a second one at a point about 8 in. behind and below the end of the tile roof of the combustion chamber. This point was about 34 in. back of the bridge wall at the point where the gases turned to go up through the first pass. It was close enough to the furnace so that no air leakage chargeable to the boiler setting had as yet occurred, and far enough back so that combustion was complete, as may be seen from a comparison of the CO in the gas there and at the dampers. The sampler used in the breeching is shown in Fig. 4 and the breeching itself in Fig. 5. In the latter it may be seen that the boiler had 3 nozzles opening from the last pass into the breeching with a damper in each one, the dampers being operated simultaneously from one control rod. A set of sample tubes cross connected as shown in Fig. 4 extended into each one of these passages. The two gate valves shown at A and B Fig. 5. Section Through Breeching. made it possible to obtain a sample from either boiler. Before...show more

Product details

  • Paperback | 80 pages
  • 189 x 246 x 4mm | 159g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236987446
  • 9781236987440