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Specific Fuel Oil Consumption (SFOC) Definition,Formula And
Calculation
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Specific Fuel Oil Consumption Definition
Consumption of fuel oil per unit energy at out put shaft is known as Specific fuel oil
consumption.Unit of specific fuel oil consumption is Kg/kWh or g/bhph .Or we can define in
another way ie, mass of fuel oil consumed per average shaft power developed by the engine
at the same time
Specific fuel oil consumption= Mass of fuel consumed per hour/break power in
that particular hour
Detailed Specific Fuel Oil Consumption calculation for diesel engine SFOC
Calculation
SFOC = ( Co x D x 10^6 )/(h x Pe)
where:
Co = Fuel oil consumption over the period (m^3)
D = Corrected gravity (t/m3)
h = Measuring period, hours
Pe =Brake horse power, bhp
Specific Fuel Oil Consumption Calculation
For finding Specific fuel oil consumption we should know all the values which is required
for the above formula
>Take fuel oil flow meter reading for specific time interval usually take one hour period.
ie h=1hr
>Difference between two reading gives you the Volume ie Co
>Density of fuel oil is in bunker delivery note or in sample test result using this value
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calculate the density of fuel oil at the temperature near the low meter D
Temperature corrected Density D= (Density of Fuel Oil @ 15 degree Celsius) * [1- {(T-15)
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>Calculate the shaft power at the given interval Pe . Shaft power is calculated by the
help of dynamometer or using fuel index and RPM you can find out the break power from
the graph given in manual.
For example
h =1hr
Co =1.3m3
D119 =0.94t/m3
Pe =8,200 bhp
SFOC = ( Co x D x 10^6 )/(h x Pe)
Latest Comments
=149.03g/bhph
1 of 3 16-10-2017, 00:13
Specific Fuel Oil Consumption (SFOC) Definition,Formula And Calcula... http://www.marinesite.info/2014/03/specific-fuel-oil-consumption.html
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what is generally the density of hfo and diesel oil at 15 c
Bijay Kumar Singh commented:
Reply Very useful
Replies
Ermie Tupaz commented:
that is given by your laboratory
Bijoy chandrasekhar 3 January 2017 at 20:42
(BDN).
density for hfo is aroung 0.99 @ 15 C and Do is .8 aprox.
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Ermie Tupaz 5 October 2017 at 10:16
Unknown commented:
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Anonymous 24 March 2017 at 00:07
How to find Specific Lube Oil Consumption plz anybody Share it with me
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Reply
Anonymous 23 May 2017 at 18:52
how to get SPFOC in g/kWh of boiler consumption with power rating of 31KW and fuel consumption of
385kg/h .
Reply
Jade Graham 2 August 2017 at 22:30
A look at Kwantas Assets consist mostly Palm Oil Plantations & some Palm Oil Mills in Guanchow, China.
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Reply
kevin rex 31 August 2017 at 00:00
Mass correction also has to be added to this,even the calorific value has to be accounted
Reply
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