Engineers and Engineering Volume 31

Engineers and Engineering Volume 31

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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. 1914 edition. Excerpt: ...turbines, a practice which is becoming more and more common. Economizers have not been widely used in large central stations, for although at times of peak load they can extract from the flue gases some heat that would be otherwise wasted, the cost of operating and maintaining them for the rest of the time is enough to largely counter-balance this saving. The net result is usually not large enough to justify the economizer unless the load factor approaches that of a manufacturing plant, or unless coal is very dear, or where there is some special reason for needing the storage of a large quantity of hot water to help out the boiler plant. The extension of the Fisk St. Station in Chicago is being fitted with an economizer installation, but on a plan different from that usually followed in past installations, in that there is to be a separate economizer for each battery of boilers, each with its own induced draft fans. This scheme will obviate some of the objectionable features of the older type, where one large economizer installation usually handled all the flue gases from a considerable number of. boilers. In very 'arge stations provision now has to be made for the proper admission of air to the boiler room for combustion, particularly where natural draft is used. The required quantity is so enormous that in order to make the boiler room habitable in winter time it is desirable to handle the air, necessary for combustion, through the ashpits, and not through the firing aisle. The present day tendency is to improve economy in the boiler room, where the coal is being burned. Engineers are now recognizing, and it has been proved by actual experience in Detroit, that if men who rank as skilled mechanics are employed as firemen, they can more

Product details

  • Paperback | 106 pages
  • 189 x 246 x 6mm | 204g
  • United States
  • English
  • black & white illustrations
  • 1236853520
  • 9781236853523