Superheated Steam in Locomotive Service (Classic Reprint) PDF Download

Author: William F. M. Goss
Publisher:
ISBN: 9781332338931
Category : Technology & Engineering
Languages : en
Pages : 158

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Book Description
Excerpt from Superheated Steam in Locomotive Service The results of the study concerning the value of superheated steam in locomotive service, the details of which are presented in the succeeding pages, may be summarized as follows: 1. Foreign practice has proved that superheated steam may be successfully used in locomotive service without involving mechanism which is unduly complicated or difficult to maintain. 2. There is ample evidence to prove that the various details in contact with the highly heated steam, such as the superheater, piping, valves, pistons, and rod packing, as employed in German practice, give practically no trouble in maintenance; they are ordinarily not the things most in need of attention when a locomotive is held for repairs. 3. The results of tests confirm, in general terms, the statements of German engineers to the effect that superheating materially reduces the consumption of water and fuel and increases the power capacity of the locomotive. 4. The combined boiler and superheater tested contains 943 feet of water-heating surface and 193 feet of superheating surface; it delivers steam which is superheated approximately 150 . The amount of superheat diminishes when the boiler-pressure is increased, and increases when the rate of evaporation is increased, the precise relation being T=1230-0.265P+7.28H where T represents the superheat in degrees Fahrenheit, P the boiler-pressure by gage, and H the equivalent evaporation per foot of water-heating surface per hour. 5. The evaporation efficiency of the combined boiler and superheater tested is E=11.706-0.214H where E is the equivalent evaporation per pound of fuel and H is the equivalent evaporation per hour per foot of water-heating and superheating surface. 6. The addition of the superheater to a boiler originally designed for saturated steam involved some reduction in the total area of heat-transmitting surface, but the efficiency of the combination when developing a given amount of power was not lower than that of the original boiler. 7. The ratio of the heat absorbed per foot of superheating surface to that absorbed per foot of water-heating surface ranges from 0.34 to 0.53, the value increasing as the rate of evaporation is increased. 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."