The Marine Steam Engine ...Longmans, 1899 - 519 páginas |
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Página 4
... resistance to the progress of the vessel . For fighting ships paddle - wheels were particularly unsuitable . The wheels themselves were exposed to danger from shot and shell , and the paddle - boxes interfered seriously with the ...
... resistance to the progress of the vessel . For fighting ships paddle - wheels were particularly unsuitable . The wheels themselves were exposed to danger from shot and shell , and the paddle - boxes interfered seriously with the ...
Página 19
... resistance overcome through a certain distance by means of this exertion is the work done . Measurement of work and energy : -The amount of work done is measured by multiplying the magnitude of the resistance — or , in other words , the ...
... resistance overcome through a certain distance by means of this exertion is the work done . Measurement of work and energy : -The amount of work done is measured by multiplying the magnitude of the resistance — or , in other words , the ...
Página 20
... resistance of the ship and driving her through the water . The ratio of this useful work to the total energy expended by the propeller is called the Efficiency of the propeller . It may be taken 20 THE MARINE STEAM - ENGINE.
... resistance of the ship and driving her through the water . The ratio of this useful work to the total energy expended by the propeller is called the Efficiency of the propeller . It may be taken 20 THE MARINE STEAM - ENGINE.
Página 24
... resistance offered to heat entering and leaving the surfaces of the plates is in general so much greater than the resistance offered to its passage through the body of the plate , that the nature and thickness of the plate have little ...
... resistance offered to heat entering and leaving the surfaces of the plates is in general so much greater than the resistance offered to its passage through the body of the plate , that the nature and thickness of the plate have little ...
Página 25
... resistance of external bodies to the change of volume which ensues . Work is therefore done in changing the water from a liquid into a gas , and this is stored up as mechanical energy , which can be yielded back again either as work ...
... resistance of external bodies to the change of volume which ensues . Work is therefore done in changing the water from a liquid into a gas , and this is stored up as mechanical energy , which can be yielded back again either as work ...
Otras ediciones - Ver todas
The Marine Steam Engine: A Treatise for Engineering Students, Young ... Richard Sennett Sin vista previa disponible - 2018 |
The Marine Steam Engine: A Treatise for Engineering Students, Young ... Richard Sennett Sin vista previa disponible - 2016 |
Términos y frases comunes
action air-pump amount angle arrangement auxiliary Belleville boiler bilge blades boilers bottom cause cent centre coal cock combustion chamber compound engines compression condenser connected considerable crank crank-shaft Crown 8vo curve diameter drain draught eccentric efficiency evaporation exhaust expansion engines Fahr feed-water fire fitted friction funnel furnace gases gauge gear gunmetal heating surface high-pressure cylinder holes horizontal Illustrations increased indicator diagram initial pressure jacket lever low-pressure cylinder manganese bronze marine engines mean effective pressure motion necessary obtained orifice paddle-wheel piston plates ports position practice prevent propeller pump quantity rate of expansion reduced revolutions per minute riveted Royal Navy safety valves screw sea-water shaft ship shown in Fig side slide-valve space speed square inch steam pipes steam pressure steel stokehold stroke suction surface condensers temperature triple expansion engines tubes vertical vessels volume water-tube boilers weight
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Página 142 - I call the steam vessel, must, during the whole time the engine is at work, be kept as hot as the steam that enters it ; first, by enclosing it in a case of wood, or any other materials that transmit heat slowly ; secondly, by surrounding it with steam, or other heated bodies ; and, thirdly, by suffering neither water, nor any other substance colder than the steam, to enter or touch it during that time...
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Página 142 - I intend, in many cases, to employ the expansive force of steam to press on the pistons, or whatever may be used instead of them, in the same manner as the pressure of the atmosphere is now employed in common...