A Textbook on Marine Engineering ...: Steam and Steam Boilers, Steam Engines, the Machinery of Western River Steamboats, Recent Developments in Marine EngineeringInternational textbook Company, 1900 |
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Σελίδα 274
... fire or fur- nace . Heat is communicated to the mole- cules of water , and they begin to move faster and faster and faster . That is , their kinetic energy increases , and , if a thermom- eter were inserted in the vessel , it would be ...
... fire or fur- nace . Heat is communicated to the mole- cules of water , and they begin to move faster and faster and faster . That is , their kinetic energy increases , and , if a thermom- eter were inserted in the vessel , it would be ...
Σελίδα 283
... fire , the air contained in the water is first driven off , and escapes from the surface . The water in contact with the part of the vessel nearest the fire receives heat first and expands . Its specific gravity is reduced ; that is ...
... fire , the air contained in the water is first driven off , and escapes from the surface . The water in contact with the part of the vessel nearest the fire receives heat first and expands . Its specific gravity is reduced ; that is ...
Σελίδα 291
... fire or hot gases on one side and water on the other , the surface in contact with the fire is called the heating surface . The sum of all such surfaces is called the total heating surface . Boilers may be divided into three classes ...
... fire or hot gases on one side and water on the other , the surface in contact with the fire is called the heating surface . The sum of all such surfaces is called the total heating surface . Boilers may be divided into three classes ...
Σελίδα 292
... as to prevent the hot gases from coming in contact with the shell above the water- line W. It is a general rule in boiler construction that under no circumstances should the fire line be carried above 292 STEAM AND STEAM BOILERS .
... as to prevent the hot gases from coming in contact with the shell above the water- line W. It is a general rule in boiler construction that under no circumstances should the fire line be carried above 292 STEAM AND STEAM BOILERS .
Σελίδα 293
... fire line be carried above the water - line . The part of the boiler shell above the brick- work , the steam drum , and the steam pipe are covered with some non - conducting material to prevent the radiation of heat . In the flue boiler ...
... fire line be carried above the water - line . The part of the boiler shell above the brick- work , the steam drum , and the steam pipe are covered with some non - conducting material to prevent the radiation of heat . In the flue boiler ...
Συχνά εμφανιζόμενοι όροι και φράσεις
angle ash pit belt body bottom burned carbon cast iron center of gravity circumference cock column condenser connected cubic foot cylinder denominator distance divided divisor driven engine equal evaporated EXAMPLE.-What EXAMPLES FOR PRACTICE feed-water feet figure fire flanged force fraction fuel gases gauge given grate head heating surface Hence horsepower hotwell hydrogen inches in diameter iron kinetic energy lap joint latent heat length lever load marine boilers mercury multiplied number of revolutions number of teeth oxygen piston pitch plate pounds of water pounds per square pressure allowed pulley pump quantity quotient raise ratio revolutions per minute rivets rope safety valve saturation screw shaft shell shown in Fig side smokestack SOLUTION square inch square root stay staybolts stayrods steam drum steam pipe steam pressure steel stop-valve stress temperature tensile strength tubes velocity vessel volume water-tube boilers weight wrought-iron
Δημοφιλή αποσπάσματα
Σελίδα 137 - A sphere is a solid bounded by a curved surface, every point of which is equally distant from a point within called the center.
Σελίδα 149 - Newton's Three Laws of Motion," and are as follows: I. All bodies continue in a state of rest, or of uniform motion in a straight line, unless acted upon by some external force that compels a change.
Σελίδα 474 - The conditions of the boiler and furnace in all respects should be, as nearly as possible, the same at the end as at the beginning of the test. The steam pressure should be the same, the water level the same, the fire upon the grates should be the same in quantity and condition, and the walls, flues, etc., should be of the same temperature.
Σελίδα 93 - The terms of a ratio are the two numbers to be compared ; thus, in the above ratio, 20 and 4 are the terms. When both terms are considered together, they are called a couplet ; when considered separately, the first term is called the antecedent, and the second term the consequent. Thus, in the ratio 20 : 4, 20 and 4 form a couplet, and 20 is the antecedent, and 4 the consequent.
Σελίδα 119 - If a straight line be drawn through two sides of a triangle, parallel to the third side, a second triangle will be formed whose sides will be proportional to the corresponding sides of the first triangle.
Σελίδα 97 - The first and fourth terms of a proportion are called the extremes, and the second and third terms, the means. Thus, in the foregoing proportion, 8 and 3 are the extremes and 4 and 6 are the means.
Σελίδα 10 - The number thus added to itself, or the number to be multiplied, is called the multiplicand. The number which shows how many times the multiplicand is to be taken, or the number by which we multiply, is called the multiplier.
Σελίδα 476 - The boiler should be run continuously, without stopping for meal times or for rise or fall of pressure of steam due to change of demand for steam. The draught being adjusted to the rate of evaporation or combustion desired before the test is begun, it should be retained constant during the test by means of the damper. If the boiler is not connected to the same steam pipe with other boilers, an extra outlet for steam with valve in same should...
Σελίδα 152 - In a moving body, the line described by its center of gravity is always taken as the path of the body. In finding the distance that a body has moved, the distance that the center of gravity has moved is taken.
Σελίδα 473 - ... calculation of the results of the test corrected accordingly. Wherever possible, the test should be made with standard coal of a known quality. For that portion of the country east of the Alleghany Mountains, good anthracite egg coal or Cumberland semibituminous coal may be taken as the standard for making tests. West of the Alleghany Mountains and east of the Missouri River, Pittsburg lump coal may be used.