Forged Steel Water-tube Marine BoilersBabcock & Wilcox Company, 1901 - 176 pages |
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212 degrees air heater amount Annapolis anthracite ash pit auxiliary machinery Average BABCOCK & WILCOX bituminous coal blower British thermal units calorimeter carbon cent condensed corrosion Cruiser cylinders cylindrical boilers degrees Fahrenheit Dredger dry coal dry steam efficiency evaporated per pound feed pump feed water foot of grate foot of heating fuel funnel furnace gases grate per hour grate surface heat units heating surface heating value inches of water indicated horse-power intermediate-pressure June knots Lake Lake Huron latent heat Lignite magnesium chloride main engine moisture OWNERS pounds of coal Pounds of water pounds pressure pressure on steam Rive-de-Gier ship smoke pipe speed square feet square foot steam and water steam gauge steam pressure steamer stoke hold stokers temperature tons total heat trials tubes United States Navy up-take valve vessel water drum Water evaporated water-tube boilers weight WILCOX BOILERS WILCOX MARINE BOILERS Zenith City
Popular passages
Page 101 - Barrus recommends a so-called " calibration " for dry steam. This, again, involves an assumption which is open to some doubt, which is that steam, when in a quiescent state, drops all its moisture and becomes dry. No other practical method, however, has been proposed, and this is, therefore, the only method used at the present time. Some engineers, however, refuse to make any calibration, but, instead, make an assumed allowance for error. To make the calibration, close the boiler stop valve, which...
Page 101 - ... atmospheric pressure. Theoretically the boiler pressure is indicated by the temperature of the upper thermometer ; but, owing to radiation, etc., it is usually too low, and it is better to use the readings of the boiler gauge, if correct, or better still to have a test gauge connected on the J^-inch pipe supplying the calorimeter. If the instrument be well covered, and there is as little radiating surface as possible, the above assumption that there is no loss of heat in passing through the instrument...
Page 23 - THE construction of the Babcock & Wilcox marine boiler embodies the same well-known principles as the successful land or stationary type; freedom of circulation, and economy when forcing, being important factors of both designs. The tubes forming the heating surface are divided into vertical sections and, to insure a continuous circulation in one direction, are placed at an inclination of 15 degrees with the horizontal.
Page 71 - CALORIE is the amount of heat required to raise the temperature of one kilogram of water one degree centigrade.
Page 14 - These experiments were carried no higher than 280°, at which temperature the elasticity of steam was found equal to about four times the pressure of the atmosphere. By experiments which have lately been made by myself, the elasticity of steam at the temperature of boiling oil, which has been estimated at about 600°, was found to equal forty times the pressure of the atmosphere.
Page 120 - ... slightly dirty gray or straw color, unless the water is transparent. So long as the water is red or black, corrosion is going on, and it must immediately be neutralized by freely using lime or soda, and frequently scumming and blowing off, the make-up being provided by the evaporator. The salinometer is not a very accurate instrument for determining the quantity of sea water in boiler water, but the apparatus here described gives a convenient and accurate method of ascertaining the exact number...
Page 101 - ... temperature of dry steam at atmospheric pressure. Theoretically the boiler pressure is indicated by the temperature of the upper thermometer, but owing to radiation, etc., it is usually too low, and it is better to use the readings of the boiler gauge, if correct, or better still to have a test gauge connected on the % inch pipe supplying the calorimeter.
Page 35 - I consider the battle of Santiago to have developed the necessity of the use of water-tube boilers, whether it taught us anything else or not. It would have been of the greatest advantage to have had during the blockade of Santiago boilers capable of raising steam in less than half an hour. Coal need not have been used to keep all the boilers under steam all the time. The Massachusetts might have shared in the glories of the fight if she had been fitted with water-tube boilers. The Indiana would...
Page 103 - X 100 in which x = percentage of moisture; T = calibration reading of lower thermometer; / — test reading of lower thermometer; L = latent heat of steam at boiler pressure. The method of taking a sample of steam from the main is of the greatest importance, and more erroneous results are due to improper connections than to any other cause.
Page 23 - Each section is made up of a series of straight tubes expanded at their ends into sinuous steel boxes known as " headers." The tubes are thus staggered. Extending across the front of the boiler, and connected to the upper ends of the front headers by short tubes, is a horizontal steam and water drum of ample dimensions. As the upper ends of the rear headers are also connected to this drum by horizontal tubes, each section is provided with an inlet and outlet for steam and water.