The Marine Steam Engine: A Treatise for the Use of Engineering Students and Officers of the Royal Navy |
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Page 70
... lead to an over- heating of the metal . In an ordinary boiler the crowns of the furnaces form the most efficient heating surface , next come the sides of the furnaces above the fire - bars , then the 70 THE MARINE STEAM - ENGINE .
... lead to an over- heating of the metal . In an ordinary boiler the crowns of the furnaces form the most efficient heating surface , next come the sides of the furnaces above the fire - bars , then the 70 THE MARINE STEAM - ENGINE .
Page 80
... lead into the same chamber the draught through some of the fires is often greater than through others , so that the work done is unequally distributed and the per- formance of the boiler less efficient . We may add in passing that the ...
... lead into the same chamber the draught through some of the fires is often greater than through others , so that the work done is unequally distributed and the per- formance of the boiler less efficient . We may add in passing that the ...
Page 90
... lead to overheating and burning of the boiler plates and tubes , by withdrawing a large quantity of water from the boilers . Many cylindrical boilers have been fitted with large steam domes in order to increase the steam room . When ...
... lead to overheating and burning of the boiler plates and tubes , by withdrawing a large quantity of water from the boilers . Many cylindrical boilers have been fitted with large steam domes in order to increase the steam room . When ...
Page 109
... leads to the engines . When working with non - superheated steam the damper is placed in the position B , to allow the hot gases to pass direct to the funnel without going through the superheater ; the valve E is opened and the valves D ...
... leads to the engines . When working with non - superheated steam the damper is placed in the position B , to allow the hot gases to pass direct to the funnel without going through the superheater ; the valve E is opened and the valves D ...
Page 111
... lead weights placed directly on the spindle above the valve . These valves , for marine boilers especially , had many disadvan- tages . The increased weight added to the boilers was not inconsiderable , and the oscillation of the ...
... lead weights placed directly on the spindle above the valve . These valves , for marine boilers especially , had many disadvan- tages . The increased weight added to the boilers was not inconsiderable , and the oscillation of the ...
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Common terms and phrases
absolute pressure action air-pump angle arrangement atmosphere back pressure bilge blades brass cause centre coal cocks combustion compound engine connected crank crank-shaft curve diameter draught eccentric efficiency evaporation exhaust expansion valve Fahr feed feed-water feet fitted friction funnel furnaces gases gear gun-metal heating surface high-pressure cylinder hot-well hydrometer increased indicated horse-power indicator diagrams iron jacket Kingston valves latent heat length low-pressure cylinders machinery marine boilers marine engines metal motion necessary ordinary orifice paddle-wheel pass pipes piston plates port pounds per square pressure of steam prevent propeller pumps quantity rates of expansion reduced revolutions per minute Royal Navy safety-valves screw screw-propeller sea-water sensible heat shaft ship shown in Fig side slide slide-valve speed square inch steam pressure steam-pipes steel stokeholds stroke suction suitable superheated superheater surface condensers temperature thermal units total heat triple expansion engines tubes vertical weight
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.