. Shipbuilding and Shipping Record. lial a III per ciul. gr-cairr \oliniic of sicaiii. » liiili »cij;lis per cent, less pir unit of volume than saliiialid sicani, is liguifs will iii(li<alc llial there is still a consiilcialilc marginfor sleaui ccononiy. allliough a grcalcr Xdluinc ol sicirii |irr strokeis taken. Lubrication is probably the mosl pKniiiniiil ijoini in niiiiil wIiimlirst eonsidering the use of supcilicatcd slcani. In iiaiily lliis m rdnot cause apprehension. With low degrees of sii|ki iicnl. il is nolalways necessary to use any oil interiuiUy. Jliis may
. Shipbuilding and Shipping Record. lial a III per ciul. gr-cairr \oliniic of sicaiii. » liiili »cij;lis per cent, less pir unit of volume than saliiialid sicani, is liguifs will iii(li<alc llial there is still a consiilcialilc marginfor sleaui ccononiy. allliough a grcalcr Xdluinc ol sicirii |irr strokeis taken. Lubrication is probably the mosl pKniiiniiil ijoini in niiiiil wIiimlirst eonsidering the use of supcilicatcd slcani. In iiaiily lliis m rdnot cause apprehension. With low degrees of sii|ki iicnl. il is nolalways necessary to use any oil interiuiUy. Jliis may be explainedby the fact that the superheat is not sutlicicnt to carry the steamthrough the high pressure cylinder- uilliniil condensation, ^\?la?rcconilensation occurs oil lubrication may nol be necessaiy. and thisis particidarl_\ true when lo\v- j)ressurcs are carried. ].,ow superheatreally docs little more than eliminate part of the initial moderate degrees of superheat differ as to the necessity. P. & O. Liner Socotra, ashore and broken in two off Paris Plage, North Coast of France. while no change is made in the second intermediate and low jjressurecylinders. In converting saturated engines to the use of superheatedsteam an increase in the high pressure cylinder diameter is notalways advLsable, and many times not possible. In such cases, if theindicated horse power is to be obtained, it is necessary to increasethe cut off in the high pressure cylinder, thus giving an increasedvolume of steam at cut off, and. in effect, decreasing the cylinderratio. If the volume at cut off is not increased the indicated horse-power will lie .slightly decreased, assuming, of course, that theboiler pressure is not changed. To explain the necessity for thesemodifications it will only be necessary to point out that theexpansion cun-e of superheated steam falls a little more rapidlythan saturated steam and, to make up for this, the volume of steamat cut off, with, s
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherlondon, bookyear191
