Compressed Air; Experiments Upon the Transmission of Power by Compressed Air in Paris (Popp's System)
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Compressed Air; Experiments Upon the Transmission of Power by Compressed Air in Paris (Popp's System)

Compressed Air; Experiments Upon the Transmission of Power by Compressed Air in Paris (Popp's System)


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Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: rising during the compression, as all heat so taken up by the air represents work done in the steam-cylinders of which no part whatever can be utilized. If the air were compressed adiabatically, i.e., without any cooling whatever, its temperature on leaving the compressor would be about 430 deg. Fahr., a temperature higher than that of saturated steam of 300 Ibs. pressure per square inch. At St. Fargeau water for cooling is allowed to run into the cylinders through the suction-valve during the suction stroke, in such quantity that the final temperature is only 150 deg. Fahr. So far the result is satisfactory enough, but owing, unfortunately, to the particular way in which the cooling water is utilized mechanically, the air does not get cooled until after it has been compresssed, so that practically no benefit is obtained from the cooling in spite of the extent to which it occurs. The power expended, as we shall see presently, is practically equal to what would have been expended had the compression been adiabatic. The quantity of air dealt with at each revolution is 47.6 cubic feet (for the pair of double-acting compressing cylinders), which is equivalent to 3.55 Ibs., the quantity of water used being about 2.4 Ibs. After compression, the air, now having an absolute pressure of six atmospheres and a temperature of 150 deg. Fahr., is pushed into large boiler-plate receivers (III) of which some are arranged to act as separators, and in these a large portion of the cooling water, which has been carried along mechanically by the air, is deposited and removed, before the air enters the mains (IV). The principal main is 300 mm. (11.8 in.) in diameterand about f in. thick. It is of cast-iron, made in lengths perfectly plain at each end, and connected by a very simple external joint...


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Product Details
  • ISBN-13: 9780217916318
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 32
  • Spine Width: 2 mm
  • Width: 189 mm
  • ISBN-10: 0217916317
  • Publisher Date: 15 May 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 77 gr


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