Shipbuilding and Shipping Record, Vol. 10

Shipbuilding and Shipping Record, Vol. 10 : A Journal of Shipbuilding, Marine, Engineering, Docks, Harbours and Shipping; September 27, 1917 (Classic Reprint)

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Excerpt from Shipbuilding and Shipping Record, Vol. 10: A Journal of Shipbuilding, Marine, Engineering, Docks, Harbours and Shipping; September 27, 1917 It is well known that not only does an increase in the efficiency of a boiler result from the employment of hot feed water, but also that the life of the boiler is considerably increased in consequence; hence there are many advantages resulting from the employment of the exhaust from auxiliary engines as a means of heating the boiler feed water. If steam is allowed to expand below atmospheric pressure, its temperature falls below 212 Fahr., and it is the aim in all feed-heating devices that the temperature shall approximate to this figure so that the pressure on the suction side of the feed pump shall never exceed atmospheric, hence with the feed - heater system of utilisation of the exhaust from the auxiliaries the steam never expands below atmospheric pressure, but passes from the various auxiliary engines at 2 or 3 lbs. Per square' inch above that pressure, and therefore at a temperature of about 220 Fahr., into the feed heater, where it comes into contact with pipes through which the feed water is passing, and which, in consequence, has its temperature raised to very nearly boiling point before it is pumped into the boiler. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.show more

Product details

  • Paperback | 34 pages
  • 152 x 229 x 2mm | 59g
  • Forgotten Books
  • United States
  • English
  • , black & white illustrations
  • 0243171374
  • 9780243171378