The Marine Steam Engine: A Treatise for the Use of Engineering Students and Officers of the Royal Navy |
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Page 17
... stroke could be obtained . With this type of engine the piston speeds varied from 500 to 665 ft . per minute . To promote economy of fuel the cylinders were usually steam- jacketed , and made large enough to allow for considerable ...
... stroke could be obtained . With this type of engine the piston speeds varied from 500 to 665 ft . per minute . To promote economy of fuel the cylinders were usually steam- jacketed , and made large enough to allow for considerable ...
Page 159
... stroke of the piston . This diagram we will call the theoretical indicator diagram . Its area may be computed from geometrical principles , so that it may be used in theoretical investigations on the power and efficiency of the engines ...
... stroke of the piston . This diagram we will call the theoretical indicator diagram . Its area may be computed from geometrical principles , so that it may be used in theoretical investigations on the power and efficiency of the engines ...
Page 160
... stroke , the whole stroke being represented by o P , the admission of steam to the cylinder is cut off by the closing of the steam ports by the valve . The expansion of the steam in the cylinder now com- mences , and the piston is ...
... stroke , the whole stroke being represented by o P , the admission of steam to the cylinder is cut off by the closing of the steam ports by the valve . The expansion of the steam in the cylinder now com- mences , and the piston is ...
Page 163
... stroke , and the mean effective pressure is equal to the mean absolute pressure minus the assumed constant back pressure of 3 pounds per square inch . Relative volume . - By relative volume is meant the ratio of the volume of the steam ...
... stroke , and the mean effective pressure is equal to the mean absolute pressure minus the assumed constant back pressure of 3 pounds per square inch . Relative volume . - By relative volume is meant the ratio of the volume of the steam ...
Page 165
... stroke being completed by the ex- pansion of the steam . The indicator diagram representing the work in this case is A EFD BA , the part done by direct pressure during admission being shown by the rect- angle E F q A , and that due to ...
... stroke being completed by the ex- pansion of the steam . The indicator diagram representing the work in this case is A EFD BA , the part done by direct pressure during admission being shown by the rect- angle E F q A , and that due to ...
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Common terms and phrases
action air-pump angle arrangement atmosphere auxiliary back pressure bilge blades brass cause centre coal cock combustion compound engine connected crank crank-shaft curve diameter draught eccentric efficiency equal evaporation exhaust expansion engines Fahr feed feed-water feet fitted floats friction funnel furnaces gases gear gun-metal heating surface high-pressure cylinder hot-well hydrometer increased indicated horse-power indicator diagrams iron jacket Kingston valve latent heat length low-pressure cylinders marine boilers marine engines mean effective pressure metal motion necessary ordinary paddle-wheel pass pipes piston pitch plates port position pounds per square prevent propeller pump quantity rates of expansion reduced represent resistance revolutions per minute Royal Navy safety-valves screw screw-propeller sensible heat shaft ship shown in Fig side slide-valve speed square inch steam pressure steam-pipes steel stokeholds stroke suitable superheated superheater surface condensers temperature thermal units total heat triple expansion engines tubes vertical weight wheel
Popular passages
Page 32 - ... the quantity of heat necessary to raise the temperature of one pound of water at its maximum density, one degree Fahr., can be made to perform work equal to the raising of 772 Ibs.