- Fuel Consumption
28th September 2006As an example, the Emma Maersk, tonnage gross 170,974 bt, net tonnage 55,396 nt, deadweight 156,907 DWT (11,000 teu based on 14,000 ton /teu or 13,000 to 14,000 based on slots), capable of greater than 25.5 knots, but estimated at an average of 24 knots.
Dr. Ram Vis
5th October 2006Based on the figures given by you, we can estimate the fuel consumption to be about 300-350 MT per day for this vessel.
5th October 2006With regard to Emma Mærsk and its fuel consumption; the rated power output of the main engine is 80 000 kW and the specific brake fuel consumption are approximately 163 – 170 g/kWh.
5th October 2006So based on an 80,000 KW output and consumption at 163-170 g/KWh then total consumption at full power output should be between 13.04 and 13.60 MT per hour (~312 to 327 MT/day based on 24 hr operation).
Is the consumption of 163 - 170 g/KWh an industry standard or is it stated somewhere in the specs for the Emma Mærsk engines? Is there a specific fuel type associated?
27th October 2006Sorry for the late reply. The information is based on engine manufactures data, and the Fuel specification:
Fuel oil, 730 cSt/50°C - 7200 sR1/100°F - ISO 8217, category ISO-F-RMK 55.
19th April 2007About the specific vessel it is possible to reduce the fuel consumption more than 20 MT per day by using 3 types of additives. Combustion improver, Cylinder oil additive and System oil additive.
It has been recorded direct savings in the order of 4 to 9%
For a free copy of the research report from The National Technical University of Athens contact me directly.
19th April 2007
11th April 2008The above PDFs I cannot open.
Dr. Ram Vis on 5 Oct 2006 you gave estimates for the figures given for the Emma Maersk. Are you available to show the calculations of how you arrived at these values (300-350 MT per day)?
24th October 2008Dear Dr. Vis,
I am working on a project that requires me to calculate the fuel consumption (FC) of a container ship. After some preliminary research I realised that FC is commonly known to be proportional to the cube of velocity. Do you know of any generic way to calculate the FC? Although I know that FC is calculated differently based on different situations. For example, I stumbled upon
Fuel Consumption Rate = k1*Full Displacement + k2*(Ship Speed)^3 + k3*AverageWave Height
However, is there any books or published papers that can give me a good explanation of calculating FC?
19th September 2006For a 6000 TEU container ship from Hong Kong to Long Beach, understanding there are many engine configurations, what would be an estimated fuel consumption?
How is consumption generally measured (tonnes per hr; tonnes per mile; tonnes per teu-mile; etc.)?
How much would consumption vary by fuel grade? by teu capacity (2000 vs 4000 vs. 6000 vs. 8000, etc)?
Dr. Ram Vis
24th September 2006Dear Mr. Foreman,
This calculation is a bit complicated.
If a ship has the capacity to carry larger number of containers, its cost per teu per mile comes down.
If you want to transport goods through a container from Point A to Point B, the container carriers quote on the basis of how many containers they carry on that ship, how much fuel the ship consumes and of course, the distance between the two points and the speed of the container vessel.
This is the basis for the quotation. However, often, market forces determine what is actually quoted.
To answer your specific questions:
1. I cannot estimate fuel consumtion in this situation, unless you tell me the speed of the vessel.
2. Generally, ship owners quote prices for these ships based on per teu per mile. Fuel consumtion is measured at tonnes per hour.
3. Fuel consumption will not vary much with the grade of fuel. It will vary a lot with the speed of the vessel. The larger the number of teus a vessel can carry, the consumption per teu will come down. In other words, a bigger container vessel will charge lessconsume less fuel per container, all other factors being same (and hence the charge per teu is less).
Hope this answers your questions.
18th December 2009I am trying to determine fuel consumption for these two container ships
I'm told I need to know the "FO" but I do not. The power output is listed. Their max speed is around 18 knots, so I guess I could go with 16-17 knots as an average. Can I find the fuel consumption without calling someone who knows about marine engines?
Can anyone help with this?