Download - Fuel Oil Sys
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FUEL OIL SYSTEM
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1. FUEL OILS
1. H.F.O. Heavy fuel oil( residual, blends & crudes );
. !.F.O. !iesel fuel oilor".!.O. "arine !iesel oilorli#$% fuel oil( in
res%ric%ed sense )1.1.1 esidualsare residuesfro' various rafinery rocesses;
1.1. lendsare fuel oil 'i*%uresof differen% viscosi%y %o ob%ain a
roduc% of desired viscosi%y and densi%y.
1.1.+ rudes- na%ural 'i*%ures consis%in# of $ydrocarbons sul$ur,
ni%ro#en and / or o*y#en deriva%ives of $ydrocarbons.
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1. FUEL OILS
1. H.F.O. Heavy fuel oil( residual, blends & crudes );
. !.F.O. !iesel fuel oilor".!.O. "arine !iesel oilorli#$% fuel oil( in
res%ric%ed sense )1.1.1 esidualsare residuesfro' various rafinery rocesses;
1.1. lendsare fuel oil 'i*%uresof differen% viscosi%y %o ob%ain a
roduc% of desired viscosi%y and densi%y.
1.1.+ rudes- na%ural 'i*%ures consis%in# of $ydrocarbons sul$ur,
ni%ro#en and / or o*y#en deriva%ives of $ydrocarbons.
. FUEL 0ISOSI2
In%ernal resis%ance of a fluid %o rela%ive 'ove'en%. Oil is 'ore viscous
3$en cold. 0iscosi%y is 'easured in ed3ood Universal, Saybol%
Universal, Saybol% Furol and En#ler, bu% 'os% co''only in 4ine'a%ic cS%.
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+. 5U5OSE OF HE FUEL OIL S2SE"
o s%ore, %ransfer & clean%$e oil rior %o in6ec%ion.
7. SE588E FUEL OIL S2SE"S
7.1 H.F.O. Heavy fuel oil 9 in navi#a%ion;
7. !.F.O. !iesel fuel oil / or ".!.O."arine !iesel oil / or li#$% fuel oil9
in 'anuverin#.
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:. FO" HE !OULE OO" O HE E
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:. FO" HE !OULE OO" O HE E
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=. S8FE2 !E0IES
=.1 Lo3 %an4 level alar'si#nals %$a% a level in %$e %an4 is %oo lo3.
=. 5ressure loss alar'indica%es a ressure dro belo3 er'issible
li'i%s.
=.+ 0iscosi%y re#ula%or>con%rols fuel oil %e'era%ure, i.e. viscosi%y)
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=. S8FE2 !E0IES
=.1 Lo3 %an4 level alar'si#nals %$a% a level in %$e %an4 is %oo lo3.
=. 5ressure loss alar'indica%es a ressure dro belo3 er'issible
li'i%s.
=.+ 0iscosi%y re#ula%or>con%rols fuel oil %e'era%ure, i.e. viscosi%y)
=.7 5ressure re#ula%in# valveensures cons%an% ressure a% %$e fuel
'ain;
=.: ?uic4 close valvesare valves $avin# collasable bria#eand 'aybe closed fro' ou%side 'ac$inery sace.
=.= E'er#ency re'o%e cu%@ou% s3i%c$esfi%%ed %o %$e u's and
ac%ua%ed in case of e'er#ency.
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B. O"USIO
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C. F8OS LE8!I< O
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C. F8OS LE8!I< O
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C.+ 5EE8IO
Is %$e dis%ance %$e oil drole%s %ravel in%o co'bus%ion sace before
'i*in# 3i%$ air and i#ni%in#.
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5ene%ra%ion deends uon-
a) a%o'isa%ion;
b) veloci%y leavin# %$e in6ec%or
c) condi%ions 3i%$in %$e co'bus%ion c$a'ber
I% is desirable %$a% %$e fuel ene%ra%es in%o %$e 3$ole co'bus%ion
sacebu% i% s$ould no% i'in#eon %$e in%ernal surfacebefore burnin#.
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5ene%ra%ion deends uon-
a) a%o'isa%ion;
b) veloci%y leavin# %$e in6ec%or
c) condi%ions 3i%$in %$e co'bus%ion c$a'ber
I% is desirable %$a% %$e fuel ene%ra%es in%o %$e 3$ole co'bus%ion
sacebu% i% s$ould no% i'in#eon %$e in%ernal surfacebefore burnin#.
C.7 UULEE
Is %$e 'ove'en%of %$e co'ressed airand fuel3i%$in a co'bus%ionsace before co'bus%ion occurs.
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urbulence is caused by -
a) s3irl, 3$ic$ is i'ared due %o %$e air en%ry a% scavan#e or%s
b) fuel sray a%%ern
c) is%on cro3n s$ae
urbulence i'rovesfuel and air 'i*in# foreffec%ive andraid
co'bus%ion.
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. FUEL IGEOS
$ey are inser%ed in%o fuel valve oc4e%of %$e en#ine cylinder.
In6ec%ors can be fi%%ed cen%rally( si'e%rical fuel sray ) or in o%$er
3aydeendin# uon %$e osi%ion of e*$aus% valves.
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. FUEL IGEOS
$ey are inser%ed in%o fuel valve oc4e%of %$e en#ine cylinder.
In6ec%ors can be fi%%ed cen%rally( si'e%rical fuel sray ) or in o%$er
3aydeendin# uon %$e osi%ion of e*$aus% valves.!efec%s-
a) c$o4in# due %o dir%;
b) inadea%e coolin#( $i#$ %. 9 carbon buildin# u on %$e a%o'iser;)
( lo3 %. 9 e*%ernal corrosion )
es%in#-
Fuel in6ec%ors'us% be re#ulary over$auled;
8f%er asse'bly an in6ec%or is %es%ed 3i%$ a %es% u'( oera%in#
ressure and fuel sray );$ere s$ould be no lea4a#es.
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.1 OOLI