Forged Steel Water-tube Marine Boilers ...Babcock & Wilcox, 1914 - 220 من الصفحات |
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الصفحة 14
... contained 800 square feet of heating surface and 28 square feet of grate , the engine easily developing 250 indicated horse - power . The success obtained with the " Reverie " boiler warranted the con- struction , on the same lines , of ...
... contained 800 square feet of heating surface and 28 square feet of grate , the engine easily developing 250 indicated horse - power . The success obtained with the " Reverie " boiler warranted the con- struction , on the same lines , of ...
الصفحة 30
... contained water , possesses this feature in a high degree . The boiler should be able to withstand sudden and rapid changes of temperature . This means that its parts must have great freedom of expansion . The entire lack of this ...
... contained water , possesses this feature in a high degree . The boiler should be able to withstand sudden and rapid changes of temperature . This means that its parts must have great freedom of expansion . The entire lack of this ...
الصفحة 37
... contain a very small quantity of water and this is distributed among a large number of containers of small capacity . Consequently , there is no large mass of water to flash into steam . If a rupture of a tube occurs , the steam is all ...
... contain a very small quantity of water and this is distributed among a large number of containers of small capacity . Consequently , there is no large mass of water to flash into steam . If a rupture of a tube occurs , the steam is all ...
الصفحة 51
... contain from 15 to 30 per cent . of refuse or slate . Most of this , however , is usually removed when the coal is prepared for the market , so that anthracite , as sold , may contain as little as 3 per cent . On the other hand , the ...
... contain from 15 to 30 per cent . of refuse or slate . Most of this , however , is usually removed when the coal is prepared for the market , so that anthracite , as sold , may contain as little as 3 per cent . On the other hand , the ...
الصفحة 56
... bank of tubes forming the heating surface . Generally speaking , with this boiler and with careful firing and favorable conditions , from 70 to 75 per cent . of the heat units which a coal is found to contain theoretically , can be. 56.
... bank of tubes forming the heating surface . Generally speaking , with this boiler and with careful firing and favorable conditions , from 70 to 75 per cent . of the heat units which a coal is found to contain theoretically , can be. 56.
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Forged Steel Water-Tube Marine Boilers <span dir=ltr>Babcock & Wilcox Co</span> لا تتوفر معاينة - 2015 |
عبارات ومصطلحات مألوفة
air heater amount average BABCOCK & WILCOX Bituminous coal blower Boil Brazilian Navy British Navy Battleship British thermal units burner burning calorimeter carbon cent Coal per hour condensed corrosion cylinders degrees Fahrenheit diameter Dredge dry coal dry steam Duluth Equivalent evaporation ers power feed pump feed water Ferryboat Fireboat firing foot of grate foot of heating fuel furnace grate per hour grate surface heat value heating surface INDICATED HORSE-POWER installed intermediate-pressure June latent heat Lignite main engine moisture Navy Cruiser oxygen Pennsylvania Railroad Company percentage pound of combustible pound of water pounds of coal pounds pressure pressure on steam rate of combustion Rive-de-Gier San Francisco smoke pipe square feet square foot steam gauge steam jet Steam pressure STEAMER Steamship superheated superheaters tank temperature tests thermometer tubes United States Navy up-take valve vessels Water evaporated water-tube boilers weight WILCOX BOILERS WILCOX MARINE BOILER
مقاطع مشهورة
الصفحة 66 - The steam gunboat had a single scoop of modern type with a divergent nozzle based on information given in a paper read before the Society of Naval Architects and Marine Engineers of America by EF Hewins and JR Reilly.
الصفحة 12 - The necessary supply of water is to be injected, by means of a forcing pump, into the cap at one end ; and through a tube inserted into the cap at the other end, the steam is to be conveyed to the cylinder of the steam engine. The whole is then to be encircled in brick work or masonry in the usual manner, placed either horizontally or perpendicularly, at option.
الصفحة 85 - The accompanying table shows the number of British thermal units that will be absorbed by one pound of water, when heated from 32 degrees to various temperatures below 212 degrees. WATER BETWEEN 32 AND 212 DEGREES FAHRENHEIT There are four notable temperatures for pure water, viz. : 1. Freezing point at sea level, 32° F. . . . Weight per cu. ft. ,62.418 lb.; per cu. in., .03612 Ib. 2. Point of maximum density, 39.1° F.
الصفحة 95 - 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 must be on the steam pipe beyond the calorimeter connection....
الصفحة 67 - ... annular channel of the nozzle and put it in communication with the central chamber. The effect is that, when the burner is assembled with the washer in place, oil is delivered through the ducts tangentially to the central chamber where it rapidly revolves and almost immediately is discharged through the orifice in the tip.
الصفحة 68 - ... in unsuspected ways, and while almost any method may result in smokeless combustion, maximum economy and capacity can be secured only by careful and intelligent design. It is not necessary to give the air a whirling motion but, judging from our rather exhaustive experiments, better gas analyses are secured, lower air pressures are required, and less refinement of adjustment is needed if the air be brought into contact with the oil spray with the right sort of a twist. We have found the impeller...
الصفحة 12 - 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.
الصفحة 21 - 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.
الصفحة 85 - States standard gallon holds 231 cubic inches, and 8.3356 pounds of water at 62 degrees Fahrenheit. A British imperial gallon holds 277.274 cubic inches, and 10 pounds of water at 62 degrees Fahrenheit. Sea water (average) has a specific gravity of 1.028, boils at 213.2 degrees F., and weighs 64 pounds per cubic foot at 62 degrees Fahrenheit. A pressure of I pound per square inch is exerted by a column of water 2.3094 feet, or 27.71 inches high, at 62 degrees Fahrenheit.
الصفحة 61 - If the temperature is known, the conditions of combustion may be inferred. The following table, from M. Pouillet, will enable the temperature to be judged by the appearance of the fire: — To determine temperature by fusion of metals, etc., — Tables.